Merge branch 'bjorn/line-numbers-in-exceptions/OTP-9468' into major

* bjorn/line-numbers-in-exceptions/OTP-9468: (51 commits)
  debugger: By default, only save non-tail-recursive calls
  debugger: Add line_number_SUITE
  debugger: Include line numbers in exceptions
  Update examples in the documentation to include line numbers
  Update documentation for erlang:raise/3 and erlang:get_stacktrace/0
  beam_lib: Retain the "Line" chunk when stripping BEAM files
  erl: Add +L to suppress loading of line number information
  compiler: Add no_line_info for suppressing line/1 instructions
  exception_SUITE: Test line numbers in exceptions
  common_test: Use line numbers in exceptions
  common_test tests: Don't do detailed testing of the stack backtrace
  test_server: Refactor init_per_testcase/3 into two functions
  Implement process_info(Pid, current_{location,stacktrace})
  beam_emu: Factor out saving of stack trace from save_stacktrace()
  compiler: Don't create filenames starting with "./"
  ops.tab: Remove line instructions before tail-recursive calls
  Lookup and include filenames and line numbers in exceptions
  Fix decrement of continuation pointers
  Refactor building of the exception stacktrace
  BEAM loader: Load the line table
  ...

130 files changed, 4801 insertions, 2225 deletions

diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml
index 02082e57c6..8502ceadd2 100644
--- a/erts/doc/src/erl.xml
+++ b/erts/doc/src/erl.xml
@@ -587,6 +587,13 @@
         <p>Enables auto load tracing, displaying info while loading
           code.</p>
       </item>
+      <tag><c><![CDATA[+L]]></c></tag>
+      <item>
+        <p>Don't load information about source filenames and line numbers.
+	  This will save some memory, but exceptions will not contain
+	  information about the filenames and line numbers.
+          </p>
+      </item>
       <tag><marker id="erts_alloc"><c><![CDATA[+MFlag Value]]></c></marker></tag>
       <item>
         <p>Memory allocator specific flags, see
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index b7d775541f..9b560f04c9 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -1282,17 +1282,18 @@ b</pre>
       </desc>
     </func>
     <func>
-      <name>erlang:get_stacktrace() -> [{Module, Function, Arity | Args}]</name>
+      <name>erlang:get_stacktrace() -> [{Module, Function, Arity | Args, Location}]</name>
       <fsummary>Get the call stack back-trace of the last exception</fsummary>
       <type>
         <v>Module = Function = atom()</v>
         <v>Arity = arity()</v>
         <v>Args = [term()]</v>
+	<v>Location = [{atom(),term()}]</v>
       </type>
       <desc>
         <p>Get the call stack back-trace (<em>stacktrace</em>) of the last
           exception in the calling process as a list of 
-          <c>{Module,Function,Arity}</c> tuples.
+          <c>{Module,Function,Arity,Location}</c> tuples.
           The <c>Arity</c> field in the first tuple may be the argument
           list of that function call instead of an arity integer,
           depending on the exception.</p>
@@ -1302,6 +1303,25 @@ b</pre>
         <p>The stacktrace is the same data as the <c>catch</c> operator
           returns, for example:</p>
         <p><c>{'EXIT',{badarg,Stacktrace}} = catch abs(x)</c></p>
+	<p><c>Location</c> is a (possibly empty) list of two-tuples that
+	  may indicate the location in the source code of the function.
+	  The first element is an atom that describes the type of
+	  information in the second element. Currently the following
+	  items may occur:</p>
+	<taglist>
+	  <tag><c>file</c></tag>
+	  <item>
+	    <p>The second element of the tuple is a string (list of
+	      characters) representing the filename of the source file
+	      of the function.</p>
+	  </item>
+	  <tag><c>line</c></tag>
+	  <item>
+	    <p>The second element of the tuple is the line number
+	      (an integer greater than zero) in the source file
+	      where the exception occurred or the function was called.</p>
+	  </item>
+	</taglist>
         <p>See also
           <seealso marker="#error/1">erlang:error/1</seealso> and
           <seealso marker="#error/2">erlang:error/2</seealso>.</p>
@@ -3809,11 +3829,26 @@ os_prompt%</pre>
 	    catches in this process. This <c>InfoTuple</c> may be
 	    changed or removed without prior notice.</p>
           </item>
-          <tag><c>{current_function, {Module, Function, Args}}</c></tag>
+          <tag><c>{current_function, {Module, Function, Arity}}</c></tag>
           <item>
-            <p><c>Module</c>, <c>Function</c>, <c>Args</c> is
+            <p><c>Module</c>, <c>Function</c>, <c>Arity</c> is
               the current function call of the process.</p>
           </item>
+          <tag><c>{current_location, {Module, Function, Arity, Location}}</c></tag>
+          <item>
+            <p><c>Module</c>, <c>Function</c>, <c>Arity</c> is
+              the current function call of the process.
+	      <c>Location</c> is a list of two-tuples that describes the
+	      location in the source code.
+	    </p>
+          </item>
+          <tag><c>{current_stacktrace, Stack}</c></tag>
+          <item>
+            <p>Return the current call stack back-trace (<em>stacktrace</em>)
+              of the process. The stack has the same format as returned by
+	      <seealso marker="#get_stacktrace/1">erlang:get_stacktrace/0</seealso>.
+	    </p>
+          </item>
           <tag><c>{dictionary, Dictionary}</c></tag>
           <item>
             <p><c>Dictionary</c> is the dictionary of the process.</p>
@@ -4080,11 +4115,14 @@ os_prompt%</pre>
           equivalent to <c>erlang:Class(Reason)</c>.
           <c>Reason</c> is any term and <c>Stacktrace</c> is a list as
           returned from <c>get_stacktrace()</c>, that is a list of
-          3-tuples <c>{Module, Function, Arity | Args}</c> where
-          <c>Module</c> and <c>Function</c> are atoms and the third
-          element is an integer arity or an argument list. The
-          stacktrace may also contain <c>{Fun, Args}</c> tuples where
+          4-tuples <c>{Module, Function, Arity | Args,
+          Location}</c> where <c>Module</c> and <c>Function</c>
+          are atoms and the third element is an integer arity or an
+          argument list. The stacktrace may also contain <c>{Fun,
+          Args, Location}</c> tuples where
           <c>Fun</c> is a local fun and <c>Args</c> is an argument list.</p>
+	<p>The <c>Location</c> element at the end is optional.
+	  Omitting it is equivalent to specifying an empty list.</p>
         <p>The stacktrace is used as the exception stacktrace for the
           calling process; it will be truncated to the current
           maximum stacktrace depth.</p>
diff --git a/erts/emulator/beam/atom.names b/erts/emulator/beam/atom.names
index 68d64fb7b0..e7308dbf43 100644
--- a/erts/emulator/beam/atom.names
+++ b/erts/emulator/beam/atom.names
@@ -156,6 +156,8 @@ atom cr
 atom crlf
 atom creation
 atom current_function
+atom current_location
+atom current_stacktrace
 atom data
 atom debug_flags
 atom delay_trap
diff --git a/erts/emulator/beam/beam_emu.c b/erts/emulator/beam/beam_emu.c
index 937b3d9e53..afdbd65bb5 100644
--- a/erts/emulator/beam/beam_emu.c
+++ b/erts/emulator/beam/beam_emu.c
@@ -5270,6 +5270,7 @@ void process_main(void)
  OpCase(label_L):
  OpCase(too_old_compiler):
  OpCase(on_load):
+ OpCase(line_I):
     erl_exit(1, "meta op\n");
 
     /*
@@ -5686,6 +5687,25 @@ expand_error_value(Process* c_p, Uint freason, Eterm Value) {
  * that c_p->ftrace will point to a cons cell which holds the given args
  * and the saved data (encoded as a bignum).
  *
+ * There is an issue with line number information. Line number
+ * information is associated with the address *before* an operation
+ * that may fail or be stored stored on the stack. But continuation
+ * pointers point after its call instruction, not before. To avoid
+ * finding the wrong line number, we'll need to adjust them so that
+ * they point at the beginning of the call instruction or inside the
+ * call instruction. Since its impractical to point at the beginning,
+ * we'll do the simplest thing and decrement the continuation pointers
+ * by one.
+ *
+ * Here is an example of what can go wrong. Without the adjustment
+ * of continuation pointers, the call at line 42 below would seem to
+ * be at line 43:
+ *
+ * line 42
+ * call ...
+ * line 43
+ * gc_bif ...
+ *
  * (It would be much better to put the arglist - when it exists - in the
  * error value instead of in the actual trace; e.g. '{badarg, Args}'
  * instead of using 'badarg' with Args in the trace. The arglist may
@@ -5752,7 +5772,7 @@ save_stacktrace(Process* c_p, BeamInstr* pc, Eterm* reg, BifFunction bf,
 	}
 	/* Save second stack entry if CP is valid and different from pc */
 	if (depth > 0 && c_p->cp != 0 && c_p->cp != pc) {
-	    s->trace[s->depth++] = c_p->cp;
+	    s->trace[s->depth++] = c_p->cp - 1;
 	    depth--;
 	}
 	s->pc = NULL;
@@ -5772,13 +5792,13 @@ save_stacktrace(Process* c_p, BeamInstr* pc, Eterm* reg, BifFunction bf,
 	    /* Save first stack entry */
 	    ASSERT(c_p->cp);
 	    if (depth > 0) {
-		s->trace[s->depth++] = c_p->cp;
+		s->trace[s->depth++] = c_p->cp - 1;
 		depth--;
 	    }
 	    s->pc = NULL; /* Ignore pc */
 	} else {
 	    if (depth > 0 && c_p->cp != 0 && c_p->cp != pc) {
-		s->trace[s->depth++] = c_p->cp;
+		s->trace[s->depth++] = c_p->cp - 1;
 		depth--;
 	    }
 	    s->pc = pc;
@@ -5793,24 +5813,31 @@ save_stacktrace(Process* c_p, BeamInstr* pc, Eterm* reg, BifFunction bf,
     }
 
     /* Save the actual stack trace */
+    erts_save_stacktrace(c_p, s, depth);
+}
+
+void
+erts_save_stacktrace(Process* p, struct StackTrace* s, int depth)
+{
     if (depth > 0) {
 	Eterm *ptr;
 	BeamInstr *prev = s->depth ? s->trace[s->depth-1] : NULL;
 	BeamInstr i_return_trace = beam_return_trace[0];
 	BeamInstr i_return_to_trace = beam_return_to_trace[0];
+
 	/*
 	 * Traverse the stack backwards and add all unique continuation
 	 * pointers to the buffer, up to the maximum stack trace size.
 	 * 
 	 * Skip trace stack frames.
 	 */
-	ptr = c_p->stop;
-	if (ptr < STACK_START(c_p) 
-	    && (is_not_CP(*ptr)|| (*cp_val(*ptr) != i_return_trace &&
-				   *cp_val(*ptr) != i_return_to_trace))
-	    && c_p->cp) {
-	    /* Can not follow cp here - code may be unloaded */
-	    BeamInstr *cpp = c_p->cp;
+	ptr = p->stop;
+	if (ptr < STACK_START(p) &&
+	    (is_not_CP(*ptr)|| (*cp_val(*ptr) != i_return_trace &&
+				*cp_val(*ptr) != i_return_to_trace)) &&
+	    p->cp) {
+	    /* Cannot follow cp here - code may be unloaded */
+	    BeamInstr *cpp = p->cp;
 	    if (cpp == beam_exception_trace || cpp == beam_return_trace) {
 		/* Skip return_trace parameters */
 		ptr += 2;
@@ -5819,7 +5846,7 @@ save_stacktrace(Process* c_p, BeamInstr* pc, Eterm* reg, BifFunction bf,
 		ptr += 1;
 	    }
 	}
-	while (ptr < STACK_START(c_p) && depth > 0) {
+	while (ptr < STACK_START(p) && depth > 0) {
 	    if (is_CP(*ptr)) {
 		if (*cp_val(*ptr) == i_return_trace) {
 		    /* Skip stack frame variables */
@@ -5834,7 +5861,7 @@ save_stacktrace(Process* c_p, BeamInstr* pc, Eterm* reg, BifFunction bf,
 		    if (cp != prev) {
 			/* Record non-duplicates only */
 			prev = cp;
-			s->trace[s->depth++] = cp;
+			s->trace[s->depth++] = cp - 1;
 			depth--;
 		    }
 		    ptr++;
@@ -5902,9 +5929,14 @@ build_stacktrace(Process* c_p, Eterm exc) {
     struct StackTrace* s;
     Eterm  args;
     int    depth;
-    BeamInstr* current;
-    Eterm  Where = NIL;
-    Eterm *next_p = &Where;
+    FunctionInfo fi;
+    FunctionInfo* stk;
+    FunctionInfo* stkp;
+    Eterm res = NIL;
+    Uint heap_size;
+    Eterm* hp;
+    Eterm mfa;
+    int i;
 
     if (! (s = get_trace_from_exc(exc))) {
         return NIL;
@@ -5923,64 +5955,56 @@ build_stacktrace(Process* c_p, Eterm exc) {
      * saved s->current should already contain the proper value.
      */
     if (s->pc != NULL) {
-	current = find_function_from_pc(s->pc);
+	erts_lookup_function_info(&fi, s->pc, 1);
+    } else if (GET_EXC_INDEX(s->freason) ==
+	       GET_EXC_INDEX(EXC_FUNCTION_CLAUSE)) {
+	erts_lookup_function_info(&fi, s->current, 1);
     } else {
-	current = s->current;
+	erts_set_current_function(&fi, s->current);
     }
+
     /*
-     * If current is still NULL, default to the initial function
+     * If fi.current is still NULL, default to the initial function
      * (e.g. spawn_link(erlang, abs, [1])).
      */
-    if (current == NULL) {
-	current = c_p->initial;
+    if (fi.current == NULL) {
+	erts_set_current_function(&fi, c_p->initial);
 	args = am_true; /* Just in case */
     } else {
 	args = get_args_from_exc(exc);
     }
 
-    depth = s->depth;
-    
     /*
-     * Add the {M,F,A} for the current function 
-     * (where A is arity or [Argument]).
+     * Look up all saved continuation pointers and calculate
+     * needed heap space.
      */
-    {
-	int i;
-	Eterm mfa;
-	Uint heap_size = 6*(depth+1);
-	Eterm* hp = HAlloc(c_p, heap_size);
-	Eterm* hp_end = hp + heap_size;
-
-	if (args != am_true) {
-	    /* We have an arglist - use it */
-	    mfa = TUPLE3(hp, current[0], current[1], args);
-	} else {
-	    Eterm arity = make_small(current[2]);
-	    mfa = TUPLE3(hp, current[0], current[1], arity);
+    depth = s->depth;
+    stk = stkp = (FunctionInfo *) erts_alloc(ERTS_ALC_T_TMP,
+				      depth*sizeof(FunctionInfo));
+    heap_size = fi.needed + 2;
+    for (i = 0; i < depth; i++) {
+	erts_lookup_function_info(stkp, s->trace[i], 1);
+	if (stkp->current) {
+	    heap_size += stkp->needed + 2;
+	    stkp++;
 	}
-	hp += 4;
-	ASSERT(*next_p == NIL);
-	*next_p = CONS(hp, mfa, NIL);
-	next_p = &CDR(list_val(*next_p));
-	hp += 2;
+    }
 
-	/* 
-	 * Finally, we go through the saved continuation pointers.
-	 */
-	for (i = 0; i < depth; i++) {
-	    BeamInstr *fi = find_function_from_pc((BeamInstr *) s->trace[i]);
-	    if (fi == NULL) continue;
-	    mfa = TUPLE3(hp, fi[0], fi[1], make_small(fi[2]));
-	    hp += 4;
-	    ASSERT(*next_p == NIL);
-	    *next_p = CONS(hp, mfa, NIL);
-	    next_p = &CDR(list_val(*next_p));
-	    hp += 2;
-	}
-	ASSERT(hp <= hp_end);
-	HRelease(c_p, hp_end, hp);
+    /*
+     * Allocate heap space and build the stacktrace.
+     */
+    hp = HAlloc(c_p, heap_size);
+    while (stkp > stk) {
+	stkp--;
+	hp = erts_build_mfa_item(stkp, hp, am_true, &mfa);
+	res = CONS(hp, mfa, res);
+	hp += 2;
     }
-    return Where;
+    hp = erts_build_mfa_item(&fi, hp, args, &mfa);
+    res = CONS(hp, mfa, res);
+
+    erts_free(ERTS_ALC_T_TMP, (void *) stk);
+    return res;
 }
 
 
diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c
index eb10ae59a8..fad81e24d6 100644
--- a/erts/emulator/beam/beam_load.c
+++ b/erts/emulator/beam/beam_load.c
@@ -158,6 +158,7 @@ typedef struct {
 #define LITERAL_CHUNK 6
 #define ATTR_CHUNK 7
 #define COMPILE_CHUNK 8
+#define LINE_CHUNK 9
 
 #define NUM_CHUNK_TYPES (sizeof(chunk_types)/sizeof(chunk_types[0]))
 
@@ -182,6 +183,7 @@ static Uint chunk_types[] = {
     MakeIffId('L', 'i', 't', 'T'), /* 6 */
     MakeIffId('A', 't', 't', 'r'), /* 7 */
     MakeIffId('C', 'I', 'n', 'f'), /* 8 */
+    MakeIffId('L', 'i', 'n', 'e'), /* 9 */
 };
 
 /*
@@ -231,6 +233,15 @@ struct string_patch {
 };
 
 /*
+ * This structure associates a code offset with a source code location.
+ */
+
+typedef struct {
+    int pos;			/* Position in code */
+    Uint32 loc;			/* Location in source code */
+} LineInstr;
+
+/*
  * This structure contains all information about the module being loaded.
  */  
 
@@ -325,6 +336,19 @@ typedef struct {
     Literal* literals;		/* Array of literals. */
     LiteralPatch* literal_patches; /* Operands that need to be patched. */
     Uint total_literal_size;	/* Total heap size for all literals. */
+
+    /*
+     * Line table.
+     */
+    BeamInstr* line_item;	/* Line items from the BEAM file. */
+    int num_line_items;		/* Number of line items. */
+    LineInstr* line_instr;	/* Line instructions */
+    int num_line_instrs;	/* Maximum number of line instructions */
+    int current_li;		/* Current line instruction */
+    int* func_line;		/* Mapping from function to first line instr */
+    Eterm* fname;		/* List of file names */
+    int num_fnames;		/* Number of filenames in fname table */
+    int loc_size;		/* Size of location info in bytes (2/4) */
 } LoaderState;
 
 typedef struct {
@@ -332,6 +356,27 @@ typedef struct {
     Eterm* func_tab[1];		/* Pointers to each function. */
 } LoadedCode;
 
+/*
+ * Layout of the line table.
+ */
+
+#define MI_LINE_FNAME_PTR 0
+#define MI_LINE_LOC_TAB 1
+#define MI_LINE_LOC_SIZE 2
+#define MI_LINE_FUNC_TAB 3
+
+#define LINE_INVALID_LOCATION (0)
+
+/*
+ * Macros for manipulating locations.
+ */
+
+#define IS_VALID_LOCATION(File, Line) \
+    ((unsigned) (File) < 255 && (unsigned) (Line) < ((1 << 24) - 1))
+#define MAKE_LOCATION(File, Line) (((File) << 24) | (Line))
+#define LOC_FILE(Loc) ((Loc) >> 24)
+#define LOC_LINE(Loc) ((Loc) & ((1 << 24)-1))
+
 #define GetTagAndValue(Stp, Tag, Val)					\
    do {									\
       BeamInstr __w;							\
@@ -468,6 +513,7 @@ static int load_import_table(LoaderState* stp);
 static int read_export_table(LoaderState* stp);
 static int read_lambda_table(LoaderState* stp);
 static int read_literal_table(LoaderState* stp);
+static int read_line_table(LoaderState* stp);
 static int read_code_header(LoaderState* stp);
 static int load_code(LoaderState* stp);
 static GenOp* gen_element(LoaderState* stp, GenOpArg Fail, GenOpArg Index,
@@ -506,6 +552,8 @@ static Eterm native_addresses(Process* p, Eterm mod);
 int patch_funentries(Eterm Patchlist);
 int patch(Eterm Addresses, Uint fe);
 static int safe_mul(UWord a, UWord b, UWord* resp);
+static void lookup_loc(FunctionInfo* fi, BeamInstr* pc,
+		       BeamInstr* modp, int idx);
 
 
 static int must_swap_floats;
@@ -679,6 +727,18 @@ bin_load(Process *c_p, ErtsProcLocks c_p_locks,
     }
 
     /*
+     * Read the line table (if present).
+     */
+
+    CHKBLK(ERTS_ALC_T_CODE,state.code);
+    if (state.chunks[LINE_CHUNK].size > 0) {
+	define_file(&state, "line table", LINE_CHUNK);
+	if (!read_line_table(&state)) {
+	    goto load_error;
+	}
+    }
+
+    /*
      * Load the code chunk.
      */
 
@@ -786,6 +846,22 @@ bin_load(Process *c_p, ErtsProcLocks c_p_locks,
 	state.genop_blocks = next;
     }
 
+    if (state.line_item != 0) {
+	erts_free(ERTS_ALC_T_LOADER_TMP, state.line_item);
+    }
+
+    if (state.line_instr != 0) {
+	erts_free(ERTS_ALC_T_LOADER_TMP, state.line_instr);
+    }
+
+    if (state.func_line != 0) {
+	erts_free(ERTS_ALC_T_LOADER_TMP, state.func_line);
+    }
+
+    if (state.fname != 0) {
+	erts_free(ERTS_ALC_T_LOADER_TMP, state.fname);
+    }
+
     return rval;
 }
 
@@ -816,6 +892,10 @@ init_state(LoaderState* stp)
     stp->string_patches = 0;
     stp->may_load_nif = 0;
     stp->on_load = 0;
+    stp->line_item = 0;
+    stp->line_instr = 0;
+    stp->func_line = 0;
+    stp->fname = 0;
 }
 
 static int
@@ -1305,6 +1385,138 @@ read_literal_table(LoaderState* stp)
     return 0;
 }
 
+static int
+read_line_table(LoaderState* stp)
+{
+    unsigned version;
+    unsigned flags;
+    int num_line_items;
+    BeamInstr* lp;
+    int i;
+    BeamInstr fname_index;
+    BeamInstr tag;
+
+    /*
+     * If the emulator flag ignoring the line information was given,
+     * return immediately.
+     */
+
+    if (erts_no_line_info) {
+	return 1;
+    }
+
+    /*
+     * Check version of line table.
+     */
+
+    GetInt(stp, 4, version);
+    if (version != 0) {
+	/*
+	 * Wrong version. Silently ignore the line number chunk.
+	 */
+	return 1;
+    }
+
+    /*
+     * Read the remaining header words. The flag word is reserved
+     * for possible future use; for the moment we ignore it.
+     */
+    GetInt(stp, 4, flags);
+    GetInt(stp, 4, stp->num_line_instrs);
+    GetInt(stp, 4, num_line_items);
+    GetInt(stp, 4, stp->num_fnames);
+
+    /*
+     * Calculate space and allocate memory for the line item table.
+     */
+
+    num_line_items++;
+    lp = (BeamInstr *) erts_alloc(ERTS_ALC_T_LOADER_TMP,
+				  num_line_items * sizeof(BeamInstr));
+    stp->line_item = lp;
+    stp->num_line_items = num_line_items;
+
+    /*
+     * The zeroth entry in the line item table is special.
+     * It contains the undefined location.
+     */
+
+    *lp++ = LINE_INVALID_LOCATION;
+    num_line_items--;
+
+    /*
+     * Read all the line items.
+     */
+
+    stp->loc_size = stp->num_fnames ? 4 : 2;
+    fname_index = 0;
+    while (num_line_items-- > 0) {
+	BeamInstr val;
+	BeamInstr loc;
+
+	GetTagAndValue(stp, tag, val);
+	if (tag == TAG_i) {
+	    if (IS_VALID_LOCATION(fname_index, val)) {
+		loc = MAKE_LOCATION(fname_index, val);
+	    } else {
+		/*
+		 * Too many files or huge line number. Silently invalidate
+		 * the location.
+		 */
+		loc = LINE_INVALID_LOCATION;
+	    }
+	    *lp++ = loc;
+	    if (val > 0xFFFF) {
+		stp->loc_size = 4;
+	    }
+	} else if (tag == TAG_a) {
+	    if (val > stp->num_fnames) {
+		LoadError2(stp, "file index overflow (%d/%d)",
+			   val, stp->num_fnames);
+	    }
+	    fname_index = val;
+	    num_line_items++;
+	} else {
+	    LoadError1(stp, "bad tag '%c' (expected 'a' or 'i')",
+		       tag_to_letter[tag]);
+	}
+    }
+
+    /*
+     * Read all filenames.
+     */
+
+    if (stp->num_fnames != 0) {
+	stp->fname = (Eterm *) erts_alloc(ERTS_ALC_T_LOADER_TMP,
+					      stp->num_fnames *
+					      sizeof(Eterm));
+	for (i = 0; i < stp->num_fnames; i++) {
+	    byte* fname;
+	    Uint n;
+
+	    GetInt(stp, 2, n);
+	    GetString(stp, fname, n);
+	    stp->fname[i] = am_atom_put((char*)fname, n);
+	}
+    }
+
+    /*
+     * Allocate the arrays to be filled while code is being loaded.
+     */
+    stp->line_instr = (LineInstr *) erts_alloc(ERTS_ALC_T_LOADER_TMP,
+					       stp->num_line_instrs *
+					       sizeof(LineInstr));
+    stp->current_li = 0;
+    stp->func_line = (int *)  erts_alloc(ERTS_ALC_T_LOADER_TMP,
+					 stp->num_functions *
+					 sizeof(int));
+
+    return 1;
+
+ load_error:
+    return 0;
+}
+
 
 static int
 read_code_header(LoaderState* stp)
@@ -1414,7 +1626,7 @@ load_code(LoaderState* stp)
 {
     int i;
     int ci;
-    int last_func_start = 0;
+    int last_func_start = 0;	/* Needed by nif loading and line instructions */
     char* sign;
     int arg;			/* Number of current argument. */
     int num_specific;		/* Number of specific ops for current. */
@@ -1427,6 +1639,14 @@ load_code(LoaderState* stp)
     GenOp** last_op_next = NULL;
     int arity;
 
+    /*
+     * The size of the loaded func_info instruction is needed
+     * by both the nif functionality and line instructions.
+     */
+    enum {
+	FUNC_INFO_SZ = 5
+    };
+
     code = stp->code;
     code_buffer_size = stp->code_buffer_size;
     ci = stp->ci;
@@ -2013,7 +2233,6 @@ load_code(LoaderState* stp)
 	case op_i_func_info_IaaI:
 	    {
 		Uint offset;
-		enum { FINFO_SZ = 5 };
 
 		if (function_number >= stp->num_functions) {
 		    LoadError1(stp, "too many functions in module (header said %d)",
@@ -2021,27 +2240,37 @@ load_code(LoaderState* stp)
 		}
 
 		if (stp->may_load_nif) {
-		    const int finfo_ix = ci - FINFO_SZ;		    
+		    const int finfo_ix = ci - FUNC_INFO_SZ;
 		    enum { MIN_FUNC_SZ = 3 };		    
 		    if (finfo_ix - last_func_start < MIN_FUNC_SZ && last_func_start) {		   
 			/* Must make room for call_nif op */
 			int pad = MIN_FUNC_SZ - (finfo_ix - last_func_start);
 			ASSERT(pad > 0 && pad < MIN_FUNC_SZ);
 			CodeNeed(pad);
-			sys_memmove(&code[finfo_ix+pad], &code[finfo_ix], FINFO_SZ*sizeof(BeamInstr));
+			sys_memmove(&code[finfo_ix+pad], &code[finfo_ix],
+				    FUNC_INFO_SZ*sizeof(BeamInstr));
 			sys_memset(&code[finfo_ix], 0, pad*sizeof(BeamInstr));
 			ci += pad;
 			stp->labels[last_label].value += pad;
 		    }
 		}
 		last_func_start = ci;
+
+		/*
+		 * Save current offset of into the line instruction array.
+		 */
+
+		if (stp->func_line) {
+		    stp->func_line[function_number] = stp->current_li;
+		}
+
 		/*
 		 * Save context for error messages.
 		 */
 		stp->function = code[ci-2];
 		stp->arity = code[ci-1];
 
-		ASSERT(stp->labels[last_label].value == ci - FINFO_SZ);
+		ASSERT(stp->labels[last_label].value == ci - FUNC_INFO_SZ);
 		offset = MI_FUNCTIONS + function_number;
 		code[offset] = stp->labels[last_label].patches;
 		stp->labels[last_label].patches = offset;
@@ -2104,6 +2333,45 @@ load_code(LoaderState* stp)
 	    stp->catches = ci-3;
 	    break;
 
+	case op_line_I:
+	    if (stp->line_item) {
+		BeamInstr item = code[ci-1];
+		BeamInstr loc;
+		int li;
+		if (item >= stp->num_line_items) {
+		    LoadError2(stp, "line instruction index overflow (%d/%d)",
+			       item, stp->num_line_items);
+		}
+		li = stp->current_li;
+		if (li >= stp->num_line_instrs) {
+		    LoadError2(stp, "line instruction table overflow (%d/%d)",
+			       li, stp->num_line_instrs);
+		}
+		loc = stp->line_item[item];
+
+		if (ci - 2 == last_func_start) {
+		    /*
+		     * This line instruction directly follows the func_info
+		     * instruction. Its address must be adjusted to point to
+		     * func_info instruction.
+		     */
+		    stp->line_instr[li].pos = last_func_start - FUNC_INFO_SZ;
+		    stp->line_instr[li].loc = stp->line_item[item];
+		    stp->current_li++;
+		} else if (li <= stp->func_line[function_number-1] ||
+			   stp->line_instr[li-1].loc != loc) {
+		    /*
+		     * Only store the location if it is different
+		     * from the previous location in the same function.
+		     */
+		    stp->line_instr[li].pos = ci - 2;
+		    stp->line_instr[li].loc = stp->line_item[item];
+		    stp->current_li++;
+		}
+	    }
+	    ci -= 2;		/* Get rid of the instruction */
+	    break;
+
 	    /*
 	     * End of code found.
 	     */
@@ -3569,6 +3837,7 @@ freeze_code(LoaderState* stp)
     Uint size;
     unsigned catches;
     Sint decoded_size;
+    Uint line_size;
 
     /*
      * Verify that there was a correct 'FunT' chunk if there were
@@ -3579,13 +3848,19 @@ freeze_code(LoaderState* stp)
 	LoadError0(stp, stp->lambda_error);
     }
 
-    
     /*
      * Calculate the final size of the code.
      */
-
-    size = (stp->ci * sizeof(BeamInstr)) + (stp->total_literal_size * sizeof(Eterm)) +
-	strtab_size + attr_size + compile_size;
+    if (stp->line_instr == 0) {
+	line_size = 0;
+    } else {
+	line_size = (MI_LINE_FUNC_TAB + (stp->num_functions + 1) +
+		     (stp->current_li+1) + stp->num_fnames) *
+	    sizeof(Eterm) + (stp->current_li+1) * stp->loc_size;
+    }
+    size = (stp->ci * sizeof(BeamInstr)) +
+	(stp->total_literal_size * sizeof(Eterm)) +
+	strtab_size + attr_size + compile_size + line_size;
 
     /*
      * Move the code to its final location.
@@ -3673,15 +3948,66 @@ freeze_code(LoaderState* stp)
 	}
 	literal_end += stp->total_literal_size;
     }
-    
+    CHKBLK(ERTS_ALC_T_CODE,code);
+
     /*
-     * Place the string table and, optionally, attributes, after the literal heap.
+     * If there is line information, place it here.
      */
-    CHKBLK(ERTS_ALC_T_CODE,code);
+    if (stp->line_instr == 0) {
+	code[MI_LINE_TABLE] = (BeamInstr) 0;
+	str_table = (byte *) literal_end;
+    } else {
+	Eterm* line_tab = (Eterm *) literal_end;
+	Eterm* p;
+	int ftab_size = stp->num_functions;
+	int num_instrs = stp->current_li;
+	Eterm* first_line_item;
+
+	code[MI_LINE_TABLE] = (BeamInstr) line_tab;
+	p = line_tab + MI_LINE_FUNC_TAB;
+
+	first_line_item = (p + ftab_size + 1);
+	for (i = 0; i < ftab_size; i++) {
+	     *p++ = (Eterm) (BeamInstr) (first_line_item + stp->func_line[i]);
+	}
+	*p++ = (Eterm) (BeamInstr) (first_line_item + num_instrs);
+	ASSERT(p == first_line_item);
+	for (i = 0; i < num_instrs; i++) {
+		*p++ = (Eterm) (BeamInstr) (code + stp->line_instr[i].pos);
+	}
+	*p++ = (Eterm) (BeamInstr) (code + stp->ci - 1);
+
+	line_tab[MI_LINE_FNAME_PTR] = (Eterm) (BeamInstr) p;
+	memcpy(p, stp->fname, stp->num_fnames*sizeof(Eterm));
+	p += stp->num_fnames;
+
+	line_tab[MI_LINE_LOC_TAB] = (Eterm) (BeamInstr) p;
+	line_tab[MI_LINE_LOC_SIZE] = stp->loc_size;
+	if (stp->loc_size == 2) {
+	    Uint16* locp = (Uint16 *) p;
+	    for (i = 0; i < num_instrs; i++) {
+		*locp++ = (Uint16) stp->line_instr[i].loc;
+	    }
+	    *locp++ = LINE_INVALID_LOCATION;
+	    str_table = (byte *) locp;
+	} else {
+	    Uint32* locp = (Uint32 *) p;
+	    ASSERT(stp->loc_size == 4);
+	    for (i = 0; i < num_instrs; i++) {
+		*locp++ = stp->line_instr[i].loc;
+	    }
+	    *locp++ = LINE_INVALID_LOCATION;
+	    str_table = (byte *) locp;
+	}
+
+	CHKBLK(ERTS_ALC_T_CODE,code);
+    }
 
-    sys_memcpy(literal_end, stp->chunks[STR_CHUNK].start, strtab_size);
+    /*
+     * Place the string table and, optionally, attributes here.
+     */
+    sys_memcpy(str_table, stp->chunks[STR_CHUNK].start, strtab_size);
     CHKBLK(ERTS_ALC_T_CODE,code);
-    str_table = (byte *) literal_end;
     if (attr_size) {
 	byte* attr = str_table + strtab_size;
 	sys_memcpy(attr, stp->chunks[ATTR_CHUNK].start, stp->chunks[ATTR_CHUNK].size);
@@ -4809,17 +5135,24 @@ compilation_info_for_module(Process* p, /* Process whose heap to use. */
     return result;
 }
 
-
 /*
- * Returns a pointer to {module, function, arity}, or NULL if not found.
+ * Find a function from the given pc and fill information in
+ * the FunctionInfo struct. If the full_info is non-zero, fill
+ * in all available information (including location in the
+ * source code). If no function is found, the 'current' field
+ * will be set to NULL.
  */
-BeamInstr *
-find_function_from_pc(BeamInstr* pc)
+
+void
+erts_lookup_function_info(FunctionInfo* fi, BeamInstr* pc, int full_info)
 {
     Range* low = modules;
     Range* high = low + num_loaded_modules;
     Range* mid = mid_module;
 
+    fi->current = NULL;
+    fi->needed = 5;
+    fi->loc = LINE_INVALID_LOCATION;
     while (low < high) {
 	if (pc < mid->start) {
 	    high = mid;
@@ -4836,16 +5169,147 @@ find_function_from_pc(BeamInstr* pc)
 		    high1 = mid1;
 		} else if (pc < mid1[1]) {
 		    mid_module = mid;
-		    return mid1[0]+2;
+		    fi->current = mid1[0]+2;
+		    if (full_info) {
+			BeamInstr** fp = (BeamInstr **) (mid->start +
+							 MI_FUNCTIONS);
+			int idx = mid1 - fp;
+			lookup_loc(fi, pc, mid->start, idx);
+		    }
+		    return;
 		} else {
 		    low1 = mid1 + 1;
 		}
 	    }
-	    return NULL;
+	    return;
 	}
 	mid = low + (high-low) / 2;
     }
-    return NULL;
+}
+
+static void
+lookup_loc(FunctionInfo* fi, BeamInstr* orig_pc, BeamInstr* modp, int idx)
+{
+    Eterm* line = (Eterm *) modp[MI_LINE_TABLE];
+    Eterm* low;
+    Eterm* high;
+    Eterm* mid;
+    Eterm pc;
+
+    if (line == 0) {
+	return;
+    }
+
+    pc = (Eterm) (BeamInstr) orig_pc;
+    fi->fname_ptr = (Eterm *) (BeamInstr) line[MI_LINE_FNAME_PTR];
+    low = (Eterm *) (BeamInstr) line[MI_LINE_FUNC_TAB+idx];
+    high = (Eterm *) (BeamInstr) line[MI_LINE_FUNC_TAB+idx+1];
+    while (high > low) {
+	mid = low + (high-low) / 2;
+	if (pc < mid[0]) {
+	    high = mid;
+	} else if (pc < mid[1]) {
+	    int file;
+	    int index = mid - (Eterm *) (BeamInstr) line[MI_LINE_FUNC_TAB];
+
+	    if (line[MI_LINE_LOC_SIZE] == 2) {
+		Uint16* loc_table =
+		    (Uint16 *) (BeamInstr) line[MI_LINE_LOC_TAB];
+		fi->loc = loc_table[index];
+	    } else {
+		Uint32* loc_table =
+		    (Uint32 *) (BeamInstr) line[MI_LINE_LOC_TAB];
+		ASSERT(line[MI_LINE_LOC_SIZE] == 4);
+		fi->loc = loc_table[index];
+	    }
+	    if (fi->loc == LINE_INVALID_LOCATION) {
+		return;
+	    }
+	    fi->needed += 3+2+3+2;
+	    file = LOC_FILE(fi->loc);
+	    if (file == 0) {
+		/* Special case: Module name with ".erl" appended */
+		Atom* mod_atom = atom_tab(atom_val(fi->current[0]));
+		fi->needed += 2*(mod_atom->len+4);
+	    } else {
+		Atom* ap = atom_tab(atom_val((fi->fname_ptr)[file-1]));
+		fi->needed += 2*ap->len;
+	    }
+	    return;
+	} else {
+	    low = mid + 1;
+	}
+    }
+}
+
+/*
+ * Build a single {M,F,A,Loction} item to be part of
+ * a stack trace.
+ */
+Eterm*
+erts_build_mfa_item(FunctionInfo* fi, Eterm* hp, Eterm args, Eterm* mfa_p)
+{
+    BeamInstr* current = fi->current;
+    Eterm loc = NIL;
+
+    if (fi->loc != LINE_INVALID_LOCATION) {
+	Eterm tuple;
+	int line = LOC_LINE(fi->loc);
+	int file = LOC_FILE(fi->loc);
+	Eterm file_term = NIL;
+
+	if (file == 0) {
+	    Atom* ap = atom_tab(atom_val(fi->current[0]));
+	    file_term = buf_to_intlist(&hp, ".erl", 4, NIL);
+	    file_term = buf_to_intlist(&hp, (char*)ap->name, ap->len, file_term);
+	} else {
+	    Atom* ap = atom_tab(atom_val((fi->fname_ptr)[file-1]));
+	    file_term = buf_to_intlist(&hp, (char*)ap->name, ap->len, NIL);
+	}
+
+	tuple = TUPLE2(hp, am_line, make_small(line));
+	hp += 3;
+	loc = CONS(hp, tuple, loc);
+	hp += 2;
+	tuple = TUPLE2(hp, am_file, file_term);
+	hp += 3;
+	loc = CONS(hp, tuple, loc);
+	hp += 2;
+    }
+
+    if (is_list(args) || is_nil(args)) {
+	*mfa_p = TUPLE4(hp, current[0], current[1], args, loc);
+    } else {
+	Eterm arity = make_small(current[2]);
+	*mfa_p = TUPLE4(hp, current[0], current[1], arity, loc);
+    }
+    return hp + 5;
+}
+
+/*
+ * Force setting of the current function in a FunctionInfo
+ * structure. No source code location will be associated with
+ * the function.
+ */
+void
+erts_set_current_function(FunctionInfo* fi, BeamInstr* current)
+{
+    fi->current = current;
+    fi->needed = 5;
+    fi->loc = LINE_INVALID_LOCATION;
+}
+
+
+/*
+ * Returns a pointer to {module, function, arity}, or NULL if not found.
+ */
+BeamInstr*
+find_function_from_pc(BeamInstr* pc)
+{
+    FunctionInfo fi;
+
+    erts_lookup_function_info(&fi, pc, 0);
+    return fi.current;
 }
 
 /*
diff --git a/erts/emulator/beam/beam_load.h b/erts/emulator/beam/beam_load.h
index 26e3054c4b..9d4a60fed1 100644
--- a/erts/emulator/beam/beam_load.h
+++ b/erts/emulator/beam/beam_load.h
@@ -108,6 +108,11 @@ extern Uint erts_total_code_size;
 #define MI_ON_LOAD_FUNCTION_PTR 10
 
 /*
+ * Pointer to the line table (or NULL if none).
+ */
+#define MI_LINE_TABLE 11
+
+/*
  * Start of function pointer table.  This table contains pointers to
  * all functions in the module plus an additional pointer just beyond
  * the end of the last function.
@@ -116,5 +121,5 @@ extern Uint erts_total_code_size;
  * this table.
  */
 
-#define MI_FUNCTIONS         11
+#define MI_FUNCTIONS         12
 #endif /* _BEAM_LOAD_H */
diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c
index 98dde066fc..5b3261077b 100644
--- a/erts/emulator/beam/bif.c
+++ b/erts/emulator/beam/bif.c
@@ -1189,8 +1189,9 @@ raise_3(Process *c_p, Eterm class, Eterm value, Eterm stacktrace) {
     Eterm l, *hp, *hp_end, *tp;
     int depth, cnt;
     size_t sz;
+    int must_copy = 0;
     struct StackTrace *s;
-    
+
     if (class == am_error) {
 	c_p->fvalue = value;
 	reason = EXC_ERROR;
@@ -1206,35 +1207,74 @@ raise_3(Process *c_p, Eterm class, Eterm value, Eterm stacktrace) {
     /* Check syntax of stacktrace, and count depth.
      * Accept anything that can be returned from erlang:get_stacktrace/0,
      * as well as a 2-tuple with a fun as first element that the
-     * error_handler may need to give us.
+     * error_handler may need to give us. Also allow old-style
+     * MFA three-tuples.
      */
     for (l = stacktrace, depth = 0;  
 	 is_list(l);  
 	 l = CDR(list_val(l)), depth++) {
 	Eterm t = CAR(list_val(l));
-	int arity;
+	Eterm location = NIL;
+
 	if (is_not_tuple(t)) goto error;
 	tp = tuple_val(t);
-	arity = arityval(tp[0]);
-	if ((arity == 3) && is_atom(tp[1]) && is_atom(tp[2])) continue;
-	if ((arity == 2) && is_fun(tp[1])) continue;
-	goto error;
+	switch (arityval(tp[0])) {
+	case 2:
+	    /* {Fun,Args} */
+	    if (is_fun(tp[1])) {
+		must_copy = 1;
+	    } else {
+		goto error;
+	    }
+	    break;
+	case 3:
+	    /*
+	     * One of:
+	     * {Fun,Args,Location}
+	     * {M,F,A}
+	     */
+	    if (is_fun(tp[1])) {
+		location = tp[3];
+	    } else if (is_atom(tp[1]) && is_atom(tp[2])) {
+		must_copy = 1;
+	    } else {
+		goto error;
+	    }
+	    break;
+	case 4:
+	    if (!(is_atom(tp[1]) && is_atom(tp[2]))) {
+		goto error;
+	    }
+	    location = tp[4];
+	    break;
+	default:
+	    goto error;
+	}
+	if (is_not_list(location) && is_not_nil(location)) {
+	    goto error;
+	}
     }
     if (is_not_nil(l)) goto error;
     
     /* Create stacktrace and store */
-    if (depth <= erts_backtrace_depth) {
+    if (erts_backtrace_depth < depth) {
+	depth = erts_backtrace_depth;
+	must_copy = 1;
+    }
+    if (must_copy) {
+	cnt = depth;
+	c_p->ftrace = NIL;
+    } else {
+	/* No need to copy the stacktrace */
 	cnt = 0;
 	c_p->ftrace = stacktrace;
-    } else {
-	cnt = depth = erts_backtrace_depth;
-	c_p->ftrace = NIL;
     }
+
     tp = &c_p->ftrace;
     sz = (offsetof(struct StackTrace, trace) + sizeof(Eterm) - 1) 
 	/ sizeof(Eterm);
-    hp = HAlloc(c_p, sz + 2*(cnt + 1));
-    hp_end = hp + sz + 2*(cnt + 1);
+    hp = HAlloc(c_p, sz + (2+6)*(cnt + 1));
+    hp_end = hp + sz + (2+6)*(cnt + 1);
     s = (struct StackTrace *) hp;
     s->header = make_neg_bignum_header(sz - 1);
     s->freason = reason;
@@ -1242,13 +1282,29 @@ raise_3(Process *c_p, Eterm class, Eterm value, Eterm stacktrace) {
     s->current = NULL;
     s->depth = 0;
     hp += sz;
-    if (cnt > 0) {
+    if (must_copy) {
+	int cnt;
+
 	/* Copy list up to depth */
 	for (cnt = 0, l = stacktrace;
 	     cnt < depth;
 	     cnt++, l = CDR(list_val(l))) {
+	    Eterm t;
+	    Eterm *tpp;
+	    int arity;
+
 	    ASSERT(*tp == NIL);
-	    *tp = CONS(hp, CAR(list_val(l)), *tp);
+	    t = CAR(list_val(l));
+	    tpp = tuple_val(t);
+	    arity = arityval(tpp[0]);
+	    if (arity == 2) {
+		t = TUPLE3(hp, tpp[1], tpp[2], NIL);
+		hp += 4;
+	    } else if (arity == 3 && is_atom(tpp[1])) {
+		t = TUPLE4(hp, tpp[1], tpp[2], tpp[3], NIL);
+		hp += 5;
+	    }
+	    *tp = CONS(hp, t, *tp);
 	    tp = &CDR(list_val(*tp));
 	    hp += 2;
 	}
@@ -1256,7 +1312,7 @@ raise_3(Process *c_p, Eterm class, Eterm value, Eterm stacktrace) {
     c_p->ftrace = CONS(hp, c_p->ftrace, make_big((Eterm *) s));
     hp += 2;
     ASSERT(hp <= hp_end);
-    
+    HRelease(c_p, hp_end, hp);
     BIF_ERROR(c_p, reason);
     
  error:
diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c
index 6a74596f76..e17325b64f 100644
--- a/erts/emulator/beam/erl_bif_info.c
+++ b/erts/emulator/beam/erl_bif_info.c
@@ -120,6 +120,10 @@ static char erts_system_version[] = ("Erlang " ERLANG_OTP_RELEASE
 #endif
 
 static Eterm
+current_function(Process* p, Process* rp, Eterm** hpp, int full_info);
+static Eterm current_stacktrace(Process* p, Process* rp, Eterm** hpp);
+
+static Eterm
 bld_bin_list(Uint **hpp, Uint *szp, ErlOffHeap* oh)
 {
     struct erl_off_heap_header* ohh;
@@ -554,6 +558,8 @@ static Eterm pi_args[] = {
     am_suspending,
     am_min_heap_size,
     am_min_bin_vheap_size,
+    am_current_location,
+    am_current_stacktrace,
 #ifdef HYBRID
     am_message_binary
 #endif
@@ -602,8 +608,10 @@ pi_arg2ix(Eterm arg)
     case am_suspending:				return 26;
     case am_min_heap_size:			return 27;
     case am_min_bin_vheap_size:			return 28;
+    case am_current_location:			return 29;
+    case am_current_stacktrace:			return 30;
 #ifdef HYBRID
-    case am_message_binary:			return 29;
+    case am_message_binary:			return 31;
 #endif
     default:					return -1;
     }
@@ -1006,35 +1014,15 @@ process_info_aux(Process *BIF_P,
 	break;
 
     case am_current_function:
-	if (rp->current == NULL) {
-	    rp->current = find_function_from_pc(rp->i);
-	}
-	if (rp->current == NULL) {
-	    hp = HAlloc(BIF_P, 3);
-	    res = am_undefined;
-	} else {
-	    BeamInstr* current;
-
-	    if (rp->current[0] == am_erlang &&
-		rp->current[1] == am_process_info &&
-		(rp->current[2] == 1 || rp->current[2] == 2) &&
-		(current = find_function_from_pc(rp->cp)) != NULL) {
-
-		/*
-		 * The current function is erlang:process_info/2,
-		 * which is not the answer that the application want.
-		 * We will use the function pointed into by rp->cp
-		 * instead.
-		 */
+	res = current_function(BIF_P, rp, &hp, 0);
+	break;
 
-		rp->current = current;
-	    }
+    case am_current_location:
+	res = current_function(BIF_P, rp, &hp, 1);
+	break;
 
-	    hp = HAlloc(BIF_P, 3+4);
-	    res = TUPLE3(hp, rp->current[0],
-			 rp->current[1], make_small(rp->current[2]));
-	    hp += 4;
-	}
+    case am_current_stacktrace:
+	res = current_stacktrace(BIF_P, rp, &hp);
 	break;
 
     case am_initial_call:
@@ -1608,6 +1596,113 @@ process_info_aux(Process *BIF_P,
 }
 #undef MI_INC
 
+static Eterm
+current_function(Process* BIF_P, Process* rp, Eterm** hpp, int full_info)
+{
+    Eterm* hp;
+    Eterm res;
+    FunctionInfo fi;
+
+    if (rp->current == NULL) {
+	erts_lookup_function_info(&fi, rp->i, full_info);
+	rp->current = fi.current;
+    } else if (full_info) {
+	erts_lookup_function_info(&fi, rp->i, full_info);
+	if (fi.current == NULL) {
+	    /* Use the current function without location info */
+	    erts_set_current_function(&fi, rp->current);
+	}
+    }
+
+    if (BIF_P->id == rp->id) {
+	FunctionInfo fi2;
+
+	/*
+	 * The current function is erlang:process_info/{1,2},
+	 * which is not the answer that the application want.
+	 * We will use the function pointed into by rp->cp
+	 * instead if it can be looked up.
+	 */
+	erts_lookup_function_info(&fi2, rp->cp, full_info);
+	if (fi2.current) {
+	    fi = fi2;
+	    rp->current = fi2.current;
+	}
+    }
+
+    /*
+     * Return the result.
+     */
+    if (rp->current == NULL) {
+	hp = HAlloc(BIF_P, 3);
+	res = am_undefined;
+    } else if (full_info) {
+	hp = HAlloc(BIF_P, 3+fi.needed);
+	hp = erts_build_mfa_item(&fi, hp, am_true, &res);
+    } else {
+	hp = HAlloc(BIF_P, 3+4);
+	res = TUPLE3(hp, rp->current[0],
+		     rp->current[1], make_small(rp->current[2]));
+	hp += 4;
+    }
+    *hpp = hp;
+    return res;
+}
+
+static Eterm
+current_stacktrace(Process* p, Process* rp, Eterm** hpp)
+{
+    Uint sz;
+    struct StackTrace* s;
+    int depth;
+    FunctionInfo* stk;
+    FunctionInfo* stkp;
+    Uint heap_size;
+    int i;
+    Eterm* hp = *hpp;
+    Eterm mfa;
+    Eterm res = NIL;
+
+    depth = 8;
+    sz = offsetof(struct StackTrace, trace) + sizeof(BeamInstr *)*depth;
+    s = (struct StackTrace *) erts_alloc(ERTS_ALC_T_TMP, sz);
+    s->depth = 0;
+    if (rp->i) {
+	s->trace[s->depth++] = rp->i;
+	depth--;
+    }
+    if (depth > 0 && rp->cp != 0) {
+	s->trace[s->depth++] = rp->cp - 1;
+	depth--;
+    }
+    erts_save_stacktrace(rp, s, depth);
+
+    depth = s->depth;
+    stk = stkp = (FunctionInfo *) erts_alloc(ERTS_ALC_T_TMP,
+					     depth*sizeof(FunctionInfo));
+    heap_size = 3;
+    for (i = 0; i < depth; i++) {
+	erts_lookup_function_info(stkp, s->trace[i], 1);
+	if (stkp->current) {
+	    heap_size += stkp->needed + 2;
+	    stkp++;
+	}
+    }
+
+    hp = HAlloc(p, heap_size);
+    while (stkp > stk) {
+	stkp--;
+	hp = erts_build_mfa_item(stkp, hp, am_true, &mfa);
+	res = CONS(hp, mfa, res);
+	hp += 2;
+    }
+
+    erts_free(ERTS_ALC_T_TMP, stk);
+    erts_free(ERTS_ALC_T_TMP, s);
+    *hpp = hp;
+    return res;
+}
+
 #if defined(VALGRIND)
 static int check_if_xml(void)
 {
diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c
index 5f3f653e99..286fe9ff1e 100644
--- a/erts/emulator/beam/erl_init.c
+++ b/erts/emulator/beam/erl_init.c
@@ -127,6 +127,8 @@ int erts_modified_timing_level;
 
 int erts_no_crash_dump = 0;	/* Use -d to suppress crash dump. */
 
+int erts_no_line_info = 0;	/* -L: Don't load line information */
+
 /*
  * Other global variables.
  */
@@ -936,7 +938,9 @@ erl_start(int argc, char **argv)
 	case 'l':
 	    display_loads++;
 	    break;
-
+	case 'L':
+	    erts_no_line_info = 1;
+	    break;
 	case 'v':
 #ifdef DEBUG
 	    if (argv[i][2] == '\0') {
diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h
index 249df54015..a967aa0e3e 100644
--- a/erts/emulator/beam/global.h
+++ b/erts/emulator/beam/global.h
@@ -37,6 +37,7 @@
 #include "erl_process.h"
 #include "erl_sys_driver.h"
 #include "erl_debug.h"
+#include "error.h"
 
 typedef struct port Port;
 #include "erl_port_task.h"
@@ -859,10 +860,21 @@ void erts_system_monitor_clear(Process *c_p);
 void erts_system_profile_clear(Process *c_p);
 
 /* beam_load.c */
+typedef struct {
+    BeamInstr* current;		/* Pointer to: Mod, Name, Arity */
+    Uint needed;		/* Heap space needed for entire tuple */
+    Uint32 loc;			/* Location in source code */
+    Eterm* fname_ptr;		/* Pointer to fname table */
+} FunctionInfo;
+
 int erts_load_module(Process *c_p, ErtsProcLocks c_p_locks,
 		     Eterm group_leader, Eterm* mod, byte* code, int size);
 void init_load(void);
 BeamInstr* find_function_from_pc(BeamInstr* pc);
+Eterm* erts_build_mfa_item(FunctionInfo* fi, Eterm* hp,
+			   Eterm args, Eterm* mfa_p);
+void erts_lookup_function_info(FunctionInfo* fi, BeamInstr* pc, int full_info);
+void erts_set_current_function(FunctionInfo* fi, BeamInstr* current);
 Eterm erts_module_info_0(Process* p, Eterm module);
 Eterm erts_module_info_1(Process* p, Eterm module, Eterm what);
 Eterm erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info);
@@ -1053,6 +1065,7 @@ void init_emulator(void);
 void process_main(void);
 Eterm build_stacktrace(Process* c_p, Eterm exc);
 Eterm expand_error_value(Process* c_p, Uint freason, Eterm Value);
+void erts_save_stacktrace(Process* p, struct StackTrace* s, int depth);
 
 /* erl_init.c */
 
@@ -1074,6 +1087,7 @@ extern ErtsModifiedTimings erts_modified_timings[];
 #define ERTS_MODIFIED_TIMING_INPUT_REDS \
   (erts_modified_timings[erts_modified_timing_level].input_reds)
 
+extern int erts_no_line_info;
 extern Eterm erts_error_logger_warnings;
 extern int erts_initialized;
 extern int erts_compat_rel;
diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab
index 304ce22ef2..538f0b94af 100644
--- a/erts/emulator/beam/ops.tab
+++ b/erts/emulator/beam/ops.tab
@@ -94,6 +94,39 @@ i_global_copy
 
 return
 
+#
+# To ensure that a "move Src x(0)" instruction can be combined
+# with the following call instruction, we need to make sure that
+# there is no line/1 instruction between the move and the call.
+#
+
+move S r | line Loc | call_ext Ar Func => \
+     line Loc | move S r | call_ext Ar Func
+move S r | line Loc | call_ext_last Ar Func=u$is_bif D => \
+     line Loc | move S r | call_ext_last Ar Func D
+move S r | line Loc | call_ext_only Ar Func=u$is_bif => \
+     line Loc | move S r | call_ext_only Ar Func
+move S r | line Loc | call Ar Func => \
+     line Loc | move S r | call Ar Func
+
+#
+# A tail-recursive call to an external function (non-BIF) will
+# never be saved on the stack, so there is no reason to keep
+# the line instruction. (The compiler did not remove the line
+# instruction because it cannot tell the difference between
+# BIFs and ordinary Erlang functions.)
+#
+
+line Loc | call_ext_last Ar Func=u$is_not_bif D => \
+     call_ext_last Ar Func D
+line Loc | call_ext_only Ar Func=u$is_not_bif => \
+     call_ext_only Ar Func
+
+line Loc | func_info M F A => func_info M F A | line Loc
+
+line I
+
+
 %macro: allocate Allocate -pack
 %macro: allocate_zero AllocateZero -pack
 %macro: allocate_heap AllocateHeap -pack
diff --git a/erts/emulator/hipe/hipe_mode_switch.c b/erts/emulator/hipe/hipe_mode_switch.c
index e3e8367b62..0b35dbdf04 100644
--- a/erts/emulator/hipe/hipe_mode_switch.c
+++ b/erts/emulator/hipe/hipe_mode_switch.c
@@ -648,7 +648,7 @@ Eterm hipe_build_stacktrace(Process *p, struct StackTrace *s)
     if (depth < 1)
 	return NIL;
 
-    heap_size = 6 * depth;	/* each [{M,F,A}|_] is 2+4 == 6 words */
+    heap_size = 7 * depth;	/* each [{M,F,A,[]}|_] is 2+5 == 7 words */
     hp = HAlloc(p, heap_size);
     hp_end = hp + heap_size;
 
@@ -659,8 +659,8 @@ Eterm hipe_build_stacktrace(Process *p, struct StackTrace *s)
 	ra = (const void*)s->trace[i];
 	if (!hipe_find_mfa_from_ra(ra, &m, &f, &a))
 	    continue;
-	mfa = TUPLE3(hp, m, f, make_small(a));
-	hp += 4;
+	mfa = TUPLE4(hp, m, f, make_small(a), NIL);
+	hp += 5;
 	next = CONS(hp, mfa, NIL);
 	*next_p = next;
 	next_p = &CDR(list_val(next));
diff --git a/erts/emulator/test/bs_match_misc_SUITE.erl b/erts/emulator/test/bs_match_misc_SUITE.erl
index b022f96740..15427661f3 100644
--- a/erts/emulator/test/bs_match_misc_SUITE.erl
+++ b/erts/emulator/test/bs_match_misc_SUITE.erl
@@ -23,7 +23,7 @@
 	 bound_var/1,bound_tail/1,t_float/1,little_float/1,sean/1,
 	 kenneth/1,encode_binary/1,native/1,happi/1,
 	 size_var/1,wiger/1,x0_context/1,huge_float_field/1,
-	 writable_binary_matched/1,otp_7198/1]).
+	 writable_binary_matched/1,otp_7198/1,unordered_bindings/1]).
 
 -include_lib("test_server/include/test_server.hrl").
 
@@ -33,7 +33,7 @@ all() ->
     [bound_var, bound_tail, t_float, little_float, sean,
      kenneth, encode_binary, native, happi, size_var, wiger,
      x0_context, huge_float_field, writable_binary_matched,
-     otp_7198].
+     otp_7198, unordered_bindings].
 
 groups() -> 
     [].
@@ -553,5 +553,15 @@ otp_7198_scan(<<C, Rest/binary>>, TokAcc) when
                         otp_7198_scan(Rest, [{'KEYWORD', C} | TokAcc])
         end.
 
+unordered_bindings(Config) when is_list(Config) ->
+    {<<1,2,3,4>>,<<42,42>>,<<3,3,3>>} =
+	unordered_bindings(4, 2, 3, <<1,2,3,4, 42,42, 3,3,3, 3>>),
+    ok.
+
+unordered_bindings(CompressedLength, HashSize, PadLength, T) ->
+    <<Content:CompressedLength/binary,Mac:HashSize/binary,
+     Padding:PadLength/binary,PadLength>> = T,
+    {Content,Mac,Padding}.
+
 
 id(I) -> I.
diff --git a/erts/emulator/test/call_trace_SUITE.erl b/erts/emulator/test/call_trace_SUITE.erl
index 93fdc157f7..3e2bee06d1 100644
--- a/erts/emulator/test/call_trace_SUITE.erl
+++ b/erts/emulator/test/call_trace_SUITE.erl
@@ -934,6 +934,10 @@ exception_nocatch(Config) when is_list(Config) ->
     exception_nocatch().
 
 exception_nocatch() ->
+    Deep4LocThrow = get_deep_4_loc({throw,[42]}),
+    Deep4LocError = get_deep_4_loc({error,[42]}),
+    Deep4LocBadmatch = get_deep_4_loc({'=',[a,b]}),
+
     Prog = [{'_',[],[{exception_trace}]}],
     ?line 1 = erlang:trace_pattern({?MODULE,deep_1,'_'}, Prog),
     ?line 1 = erlang:trace_pattern({?MODULE,deep_2,'_'}, Prog),
@@ -959,8 +963,9 @@ exception_nocatch() ->
 			   {trace,t2,exception_from,{erlang,throw,1},
 			    {error,{nocatch,Q2}}}],
 			  exception_from, {error,{nocatch,Q2}}),
-    ?line expect({trace,T2,exit,{{nocatch,Q2},[{erlang,throw,[Q2]},
-					       {?MODULE,deep_4,1}]}}),
+    ?line expect({trace,T2,exit,{{nocatch,Q2},[{erlang,throw,[Q2],[]},
+					       {?MODULE,deep_4,1,
+						Deep4LocThrow}]}}),
     ?line Q3 = {dump,[dump,{dump}]},
     ?line T3 = 
 	exception_nocatch(?LINE, error, [Q3], 4, 
@@ -968,18 +973,29 @@ exception_nocatch() ->
 			   {trace,t3,exception_from,{erlang,error,1},
 			    {error,Q3}}],
 			  exception_from, {error,Q3}),
-    ?line expect({trace,T3,exit,{Q3,[{erlang,error,[Q3]},
-				     {?MODULE,deep_4,1}]}}),
+    ?line expect({trace,T3,exit,{Q3,[{erlang,error,[Q3],[]},
+				     {?MODULE,deep_4,1,Deep4LocError}]}}),
     ?line T4 = 
 	exception_nocatch(?LINE, '=', [17,4711], 5, [], 
 			  exception_from, {error,{badmatch,4711}}),
-    ?line expect({trace,T4,exit,{{badmatch,4711},[{?MODULE,deep_4,1}]}}),
+    ?line expect({trace,T4,exit,{{badmatch,4711},
+				 [{?MODULE,deep_4,1,Deep4LocBadmatch}]}}),
     %%
     ?line erlang:trace_pattern({?MODULE,'_','_'}, false),
     ?line erlang:trace_pattern({erlang,'_','_'}, false),
     ?line expect(),
     ?line ok.
 
+get_deep_4_loc(Arg) ->
+    try
+	deep_4(Arg),
+	?t:fail(should_not_return_to_here)
+    catch
+	_:_ ->
+	    [{?MODULE,deep_4,1,Loc0}|_] = erlang:get_stacktrace(),
+	    Loc0
+    end.
+
 exception_nocatch(Line, B, Q, N, Extra, Tag, R) ->
     ?line io:format("== Subtest: ~w", [Line]),
     ?line Go = make_ref(),
diff --git a/erts/emulator/test/exception_SUITE.erl b/erts/emulator/test/exception_SUITE.erl
index 9d6fc9521d..109cec25cb 100644
--- a/erts/emulator/test/exception_SUITE.erl
+++ b/erts/emulator/test/exception_SUITE.erl
@@ -23,9 +23,10 @@
 	 init_per_group/2,end_per_group/2, 
 	 badmatch/1, pending_errors/1, nil_arith/1,
          stacktrace/1, nested_stacktrace/1, raise/1, gunilla/1, per/1,
-	 exception_with_heap_frag/1]).
+	 exception_with_heap_frag/1, line_numbers/1]).
 
 -export([bad_guy/2]).
+-export([crash/1]).
 
 -include_lib("test_server/include/test_server.hrl").
 -import(lists, [foreach/2]).
@@ -35,7 +36,7 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 all() -> 
     [badmatch, pending_errors, nil_arith, stacktrace,
      nested_stacktrace, raise, gunilla, per,
-     exception_with_heap_frag].
+     exception_with_heap_frag, line_numbers].
 
 groups() -> 
     [].
@@ -141,14 +142,20 @@ pending_exit_message(Args, Expected) ->
     end,
     process_flag(trap_exit, false).
 
-pending({badarg, [{erlang,Bif,BifArgs},{?MODULE,Func,Arity}|_]}, Func, Args, _Code)
-  when is_atom(Bif), is_list(BifArgs), length(Args) == Arity ->
+pending({badarg,[{erlang,Bif,BifArgs,Loc1},
+		 {?MODULE,Func,Arity,Loc2}|_]},
+	Func, Args, _Code)
+  when is_atom(Bif), is_list(BifArgs), length(Args) =:= Arity,
+       is_list(Loc1), is_list(Loc2) ->
     ok;
-pending({undef,[{non_existing_module,foo,[]}|_]}, _, _, _) ->
+pending({undef,[{non_existing_module,foo,[],Loc}|_]}, _, _, _)
+  when is_list(Loc) ->
     ok;
-pending({function_clause,[{?MODULE,Func,Args}|_]}, Func, Args, _Code) ->
+pending({function_clause,[{?MODULE,Func,Args,Loc}|_]}, Func, Args, _Code)
+  when is_list(Loc) ->
     ok;
-pending({Code,[{?MODULE,Func,Arity}|_]}, Func, Args, Code) when length(Args) == Arity ->
+pending({Code,[{?MODULE,Func,Arity,Loc}|_]}, Func, Args, Code)
+  when length(Args) =:= Arity, is_list(Loc) ->
     ok;
 pending(Reason, _Function, _Args, _Code) ->
     test_server:fail({bad_exit_reason,Reason}).
@@ -255,24 +262,24 @@ stacktrace(Conf) when is_list(Conf) ->
     ?line {_,Mref} = spawn_monitor(fun() -> exit({Tag,erlang:get_stacktrace()}) end),
     ?line {Tag,[]} = receive {'DOWN',Mref,_,_,Info} -> Info end,
     V = [make_ref()|self()],
-    ?line {value2,{caught1,badarg,[{erlang,abs,[V]}|_]=St1}} =
+    ?line {value2,{caught1,badarg,[{erlang,abs,[V],_}|_]=St1}} =
 	stacktrace_1({'abs',V}, error, {value,V}),
     ?line St1 = erase(stacktrace1),
     ?line St1 = erase(stacktrace2),
     ?line St1 = erlang:get_stacktrace(),
-    ?line {caught2,{error,badarith},[{?MODULE,my_add,2}|_]=St2} =
+    ?line {caught2,{error,badarith},[{?MODULE,my_add,2,_}|_]=St2} =
 	stacktrace_1({'div',{1,0}}, error, {'add',{0,a}}),
-    ?line [{?MODULE,my_div,2}|_] = erase(stacktrace1),
+    ?line [{?MODULE,my_div,2,_}|_] = erase(stacktrace1),
     ?line St2 = erase(stacktrace2),
     ?line St2 = erlang:get_stacktrace(),
-    ?line {caught2,{error,{try_clause,V}},[{?MODULE,stacktrace_1,3}|_]=St3} =
+    ?line {caught2,{error,{try_clause,V}},[{?MODULE,stacktrace_1,3,_}|_]=St3} =
 	stacktrace_1({value,V}, error, {value,V}),
     ?line St3 = erase(stacktrace1),
     ?line St3 = erase(stacktrace2),
     ?line St3 = erlang:get_stacktrace(),
-    ?line {caught2,{throw,V},[{?MODULE,foo,1}|_]=St4} =
+    ?line {caught2,{throw,V},[{?MODULE,foo,1,_}|_]=St4} =
 	stacktrace_1({value,V}, error, {throw,V}),
-    ?line [{?MODULE,stacktrace_1,3}|_] = erase(stacktrace1),
+    ?line [{?MODULE,stacktrace_1,3,_}|_] = erase(stacktrace1),
     ?line St4 = erase(stacktrace2),
     ?line St4 = erlang:get_stacktrace(),
 
@@ -280,8 +287,8 @@ stacktrace(Conf) when is_list(Conf) ->
 	?line stacktrace_2()
     catch
 	error:{badmatch,_} ->
-	    [{?MODULE,stacktrace_2,0},
-	     {?MODULE,stacktrace,1}|_] =
+	    [{?MODULE,stacktrace_2,0,_},
+	     {?MODULE,stacktrace,1,_}|_] =
 		erlang:get_stacktrace(),
 	    ok
     end.
@@ -315,15 +322,15 @@ nested_stacktrace(Conf) when is_list(Conf) ->
 	nested_stacktrace_1({{value,{V,x1}},void,{V,x1}},
 			    {void,void,void}),
     ?line {caught1,
-	   [{?MODULE,my_add,2}|_],
+	   [{?MODULE,my_add,2,_}|_],
 	   value2,
-	   [{?MODULE,my_add,2}|_]} =
+	   [{?MODULE,my_add,2,_}|_]} =
 	nested_stacktrace_1({{'add',{V,x1}},error,badarith},
 			    {{value,{V,x2}},void,{V,x2}}),
     ?line {caught1,
-	   [{?MODULE,my_add,2}|_],
-	   {caught2,[{erlang,abs,[V]}|_]},
-	   [{erlang,abs,[V]}|_]} =
+	   [{?MODULE,my_add,2,_}|_],
+	   {caught2,[{erlang,abs,[V],_}|_]},
+	   [{erlang,abs,[V],_}|_]} =
 	nested_stacktrace_1({{'add',{V,x1}},error,badarith},
 			    {{'abs',V},error,badarg}),
     ok.
@@ -362,14 +369,14 @@ raise(Conf) when is_list(Conf) ->
 	end,
     ?line A = erlang:get_stacktrace(),
     ?line A = get(raise),
-    ?line [{?MODULE,my_div,2}|_] = A,
+    ?line [{?MODULE,my_div,2,_}|_] = A,
     %%
     N = 8, % Must be even
     ?line N = erlang:system_flag(backtrace_depth, N),
+    ?line B = odd_even(N, []),
     ?line try even(N) 
 	  catch error:function_clause -> ok
 	  end,
-    ?line B = odd_even(N, []),
     ?line B = erlang:get_stacktrace(),
     %%
     ?line C0 = odd_even(N+1, []),
@@ -387,19 +394,12 @@ raise(Conf) when is_list(Conf) ->
 odd_even(N, R) when is_integer(N), N > 1 ->
     odd_even(N-1, 
 	     [if (N rem 2) == 0 ->
-		      {?MODULE,even,1};
+		      {?MODULE,even,1,[{file,"odd_even.erl"},{line,3}]};
 		 true ->
-		      {?MODULE,odd,1}
+		      {?MODULE,odd,1,[{file,"odd_even.erl"},{line,6}]}
 	      end|R]);
 odd_even(1, R) ->
-    [{?MODULE,odd,[1]}|R].
-
-even(N) when is_integer(N), N > 1, (N rem 2) == 0 ->
-    odd(N-1)++[N].
-
-odd(N) when is_integer(N), N > 1, (N rem 2) == 1 ->
-    even(N-1)++[N].
-    
+    [{?MODULE,odd,[1],[{file,"odd_even.erl"},{line,5}]}|R].
 
 foo({value,Value}) -> Value;
 foo({'div',{A,B}}) ->
@@ -526,4 +526,186 @@ do_exception_with_heap_frag(Bin, [Sz|Sizes]) ->
     do_exception_with_heap_frag(Bin, Sizes);
 do_exception_with_heap_frag(_, []) -> ok.
 
+line_numbers(Config) when is_list(Config) ->
+    {'EXIT',{{case_clause,bad_tag},
+	     [{?MODULE,line1,2,
+	       [{file,"fake_file.erl"},{line,3}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch line1(bad_tag, 0)),
+    {'EXIT',{badarith,
+	     [{?MODULE,line1,2,
+	       [{file,"fake_file.erl"},{line,5}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch line1(a, not_an_integer)),
+    {'EXIT',{{badmatch,{ok,1}},
+	     [{?MODULE,line1,2,
+	       [{file,"fake_file.erl"},{line,7}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch line1(a, 0)),
+    {'EXIT',{crash,
+	     [{?MODULE,crash,1,
+	       [{file,"fake_file.erl"},{line,14}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch line1(a, 41)),
+
+    ModFile = ?MODULE_STRING++".erl",
+    [{?MODULE,maybe_crash,1,[{file,"call.erl"},{line,28}]},
+     {?MODULE,call1,0,[{file,"call.erl"},{line,14}]},
+     {?MODULE,close_calls,1,[{file,"call.erl"},{line,5}]},
+     {?MODULE,line_numbers,1,[{file,ModFile},{line,_}]}|_] =
+	close_calls(call1),
+    [{?MODULE,maybe_crash,1,[{file,"call.erl"},{line,28}]},
+     {?MODULE,call2,0,[{file,"call.erl"},{line,18}]},
+     {?MODULE,close_calls,1,[{file,"call.erl"},{line,6}]},
+     {?MODULE,line_numbers,1,[{file,ModFile},{line,_}]}|_] =
+	close_calls(call2),
+    [{?MODULE,maybe_crash,1,[{file,"call.erl"},{line,28}]},
+     {?MODULE,call3,0,[{file,"call.erl"},{line,22}]},
+     {?MODULE,close_calls,1,[{file,"call.erl"},{line,7}]},
+     {?MODULE,line_numbers,1,[{file,ModFile},{line,_}]}|_] =
+	close_calls(call3),
+    no_crash = close_calls(other),
+
+    <<0,0>> = build_binary1(16),
+    {'EXIT',{badarg,
+	     [{?MODULE,build_binary1,1,
+	       [{file,"bit_syntax.erl"},{line,72503}]},
+	      {?MODULE,line_numbers,1,
+	       [{file,ModFile},{line,_}]}|_]}} =
+	(catch build_binary1(bad_size)),
+
+    <<7,1,2,3>> = build_binary2(8, <<1,2,3>>),
+    {'EXIT',{badarg,
+	     [{?MODULE,build_binary2,2,
+	       [{file,"bit_syntax.erl"},{line,72507}]},
+	      {?MODULE,line_numbers,1,
+	       [{file,ModFile},{line,_}]}|_]}} =
+	(catch build_binary2(bad_size, <<>>)),
+    {'EXIT',{badarg,
+	     [{erlang,bit_size,[bad_binary],[]},
+	      {?MODULE,build_binary2,2,
+	       [{file,"bit_syntax.erl"},{line,72507}]},
+	      {?MODULE,line_numbers,1,
+	       [{file,ModFile},{line,_}]}|_]}} =
+	(catch build_binary2(8, bad_binary)),
+
+    {'EXIT',{function_clause,
+	     [{?MODULE,do_call_abs,[y,y],
+	       [{file,"gc_bif.erl"},{line,18}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch do_call_abs(y, y)),
+    {'EXIT',{badarg,
+	     [{erlang,abs,[[]],[]},
+	      {?MODULE,do_call_abs,2,
+	       [{file,"gc_bif.erl"},{line,19}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch do_call_abs(x, [])),
+
+    {'EXIT',{{badmatch,"42"},
+	     [{MODULE,applied_bif_1,1,[{file,"applied_bif.erl"},{line,5}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch applied_bif_1(42)),
+
+    {'EXIT',{{badmatch,{current_location,
+			{?MODULE,applied_bif_2,0,
+			 [{file,"applied_bif.erl"},{line,9}]}}},
+	     [{MODULE,applied_bif_2,0,[{file,"applied_bif.erl"},{line,10}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch applied_bif_2()),
+
+    ok.
+
 id(I) -> I.
+
+-file("odd_even.erl", 1).			%Line 1
+even(N) when is_integer(N), N > 1, (N rem 2) == 0 ->
+    odd(N-1)++[N].				%Line 3
+
+odd(N) when is_integer(N), N > 1, (N rem 2) == 1 ->
+    even(N-1)++[N].				%Line 6
+
+%%
+%% If the compiler removes redundant line instructions (any
+%% line instruction with the same location as the previous),
+%% and the loader also removes line instructions before
+%% tail-recursive calls to external functions, then the
+%% badmatch exception in line 7 below will be reported as
+%% occurring in line 6.
+%%
+%% That means that any removal of redundant line instructions
+%% must all be done in the compiler OR in the loader.
+%%
+-file("fake_file.erl", 1).			%Line 1
+line1(Tag, X) ->				%Line 2
+    case Tag of					%Line 3
+	a ->
+	    Y = X + 1,				%Line 5
+	    Res = id({ok,Y}),			%Line 6
+	    ?MODULE:crash({ok,42} = Res);	%Line 7
+	b ->
+	    x = id(x),				%Line 9
+	    ok					%Line 10
+    end.					%Line 11
+
+crash(_) ->					%Line 13
+    erlang:error(crash).			%Line 14
+
+-file("call.erl", 1).				%Line 1
+close_calls(Where) ->				%Line 2
+    put(where_to_crash, Where),			%Line 3
+    try
+	call1(),				%Line 5
+	call2(),				%Line 6
+	call3(),				%Line 7
+	no_crash				%Line 8
+    catch error:crash ->
+	    erlang:get_stacktrace()		%Line 10
+    end.					%Line 11
+
+call1() ->					%Line 13
+    maybe_crash(call1),				%Line 14
+    ok.						%Line 15
+
+call2() ->					%Line 17
+    maybe_crash(call2),				%Line 18
+    ok.						%Line 19
+
+call3() ->					%Line 21
+    maybe_crash(call3),				%Line 22
+    ok.						%Line 23
+
+maybe_crash(Name) ->				%Line 25
+    case get(where_to_crash) of			%Line 26
+	Name ->
+	    erlang:error(crash);		%Line 28
+	_ ->
+	    ok					%Line 30
+    end.
+
+-file("bit_syntax.erl", 72500).			%Line 72500
+build_binary1(Size) ->				%Line 72501
+    id(42),					%Line 72502
+    <<0:Size>>.					%Line 72503
+
+build_binary2(Size, Bin) ->			%Line 72505
+    id(0),					%Line 72506
+    <<7:Size,Bin/binary>>.			%Line 72507
+
+-file("gc_bif.erl", 17).
+do_call_abs(x, Arg) ->				%Line 18
+    abs(Arg).					%Line 19
+
+%% Make sure a BIF that is applied does not leave the p->cp
+%% set (and thus generating an extra entry on the stack).
+
+-file("applied_bif.erl", 1).
+%% Explicit apply.
+applied_bif_1(I) ->				%Line 3
+    L = apply(erlang, integer_to_list, [I]),	%Line 4
+    fail = L,					%Line 5
+    ok.						%Line 6
+%% Implicit apply.
+applied_bif_2() ->				%Line 8
+    R = process_info(self(), current_location),	%Line 9
+    fail = R,					%Line 10
+    ok.						%Line 11
diff --git a/erts/emulator/test/guard_SUITE.erl b/erts/emulator/test/guard_SUITE.erl
index f41324c2cc..a5df9b59a0 100644
--- a/erts/emulator/test/guard_SUITE.erl
+++ b/erts/emulator/test/guard_SUITE.erl
@@ -421,7 +421,7 @@ try_gbif(Id, X, Y) ->
 
 try_fail_gbif(Id, X, Y) ->
     case catch guard_bif(Id, X, Y) of
-	{'EXIT', {function_clause,[{?MODULE,guard_bif,[Id,X,Y]}|_]}} ->
+	{'EXIT',{function_clause,[{?MODULE,guard_bif,[Id,X,Y],_}|_]}} ->
 	    io:format("guard_bif(~p, ~p, ~p) -- ok", [Id,X,Y]);
 	Other ->
 	    ?line ok = io:format("guard_bif(~p, ~p, ~p) -- bad result: ~p\n",
@@ -493,9 +493,9 @@ type_tests(Test, [Type|T], Allowed) ->
 	    end;
 	false ->
 	    case catch type_test(Test, Value) of
-		{'EXIT', {function_clause, {?MODULE,type_test,[Test,Value]}}} ->
-		    ok;
-		{'EXIT', {function_clause,[{?MODULE,type_test,[Test,Value]}|_]}} ->
+		{'EXIT',{function_clause,
+			 [{?MODULE,type_test,[Test,Value],Loc}|_]}}
+		when is_list(Loc) ->
 		    ok;
 		{'EXIT',Other} ->
 		    ?line test_server:fail({unexpected_error_reason,Other});
diff --git a/erts/emulator/test/process_SUITE.erl b/erts/emulator/test/process_SUITE.erl
index f68e712268..fdc55a4cc5 100644
--- a/erts/emulator/test/process_SUITE.erl
+++ b/erts/emulator/test/process_SUITE.erl
@@ -35,7 +35,7 @@
 	 self_exit/1, normal_suicide_exit/1, abnormal_suicide_exit/1,
 	 t_exit_2_catch/1, trap_exit_badarg/1, trap_exit_badarg_in_bif/1,
 	 exit_and_timeout/1, exit_twice/1,
-	 t_process_info/1, process_info_other_msg/1,
+	 t_process_info/1, process_info_other/1, process_info_other_msg/1,
 	 process_info_other_dist_msg/1,
 	 process_info_2_list/1, process_info_lock_reschedule/1,
 	 process_info_lock_reschedule2/1,
@@ -64,7 +64,7 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 all() -> 
     [spawn_with_binaries, t_exit_1, {group, t_exit_2},
      trap_exit_badarg, trap_exit_badarg_in_bif,
-     t_process_info, process_info_other_msg,
+     t_process_info, process_info_other, process_info_other_msg,
      process_info_other_dist_msg, process_info_2_list,
      process_info_lock_reschedule,
      process_info_lock_reschedule2,
@@ -258,7 +258,9 @@ trap_exit_badarg() ->
     ?line Pid = fun_spawn(fun() -> bad_guy(kb_128()) end),
     ?line Garbage = kb_128(),
     ?line receive
-	      {'EXIT', Pid, {badarg,[{erlang,abs,[Garbage]},{?MODULE,bad_guy,1}|_]}} ->
+	      {'EXIT',Pid,{badarg,[{erlang,abs,[Garbage],Loc1},
+				   {?MODULE,bad_guy,1,Loc2}|_]}}
+	      when is_list(Loc1), is_list(Loc2) ->
 		  ok;
 	      Other ->
 		  ?line ok = io:format("Bad EXIT message: ~P", [Other, 30]),
@@ -410,7 +412,7 @@ etwice_high(Low) ->
     exit(Low, first),
     exit(Low, second).
 
-%% Tests the process_info/1 BIF.
+%% Tests the process_info/2 BIF.
 t_process_info(Config) when is_list(Config) ->
     ?line [] = process_info(self(), registered_name),
     ?line register(my_name, self()),
@@ -418,13 +420,100 @@ t_process_info(Config) when is_list(Config) ->
     ?line {status, running} = process_info(self(), status),
     ?line {min_heap_size, 233} = process_info(self(), min_heap_size),
     ?line {min_bin_vheap_size, 46368} = process_info(self(), min_bin_vheap_size),
-    ?line {current_function, {?MODULE, t_process_info, 1}} =
+    ?line {current_function,{?MODULE,t_process_info,1}} =
 	process_info(self(), current_function),
+    ?line {current_function,{?MODULE,t_process_info,1}} =
+	apply(erlang, process_info, [self(),current_function]),
+
+    %% current_location and current_stacktrace
+    {Line1,Res1} = {?LINE,process_info(self(), current_location)},
+    verify_loc(Line1, Res1),
+    {Line2,Res2} = {?LINE,apply(erlang, process_info,
+				[self(),current_location])},
+    verify_loc(Line2, Res2),
+    pi_stacktrace([{?MODULE,t_process_info,1,?LINE}]),
+
     ?line Gleader = group_leader(),
     ?line {group_leader, Gleader} = process_info(self(), group_leader),
     ?line {'EXIT',{badarg,_Info}} = (catch process_info('not_a_pid')),
     ok.
 
+pi_stacktrace(Expected0) ->
+    {Line,Res} = {?LINE,erlang:process_info(self(), current_stacktrace)},
+    {current_stacktrace,Stack} = Res,
+    Expected = [{?MODULE,pi_stacktrace,1,Line}|Expected0],
+    pi_stacktrace_1(Stack, Expected).
+
+pi_stacktrace_1([{M,F,A,Loc}|Stk], [{M,F,A,Line}|Exp]) ->
+    case Loc of
+	[] ->
+	    %% No location info for some reason (+L, native code).
+	    io:format("Missing location information for ~w:~w/~w",
+		      [M,F,A]),
+	    ok;
+	[_|_] ->
+	    Line = proplists:get_value(line, Loc),
+	    File = proplists:get_value(file, Loc),
+	    File = ?MODULE_STRING ++ ".erl"
+    end,
+    pi_stacktrace_1(Stk, Exp);
+pi_stacktrace_1([_|_], []) -> ok.
+
+verify_loc(Line, {current_location,{?MODULE,t_process_info=F,1=A,Loc}}) ->
+    case Loc of
+	[] ->
+	    %% No location info for some reason (+L, native code).
+	    io:format("Missing location information for ~w:~w/~w",
+		      [?MODULE,F,A]),
+	    ok;
+	[_|_] ->
+	    Line = proplists:get_value(line, Loc),
+	    File = proplists:get_value(file, Loc),
+	    File = ?MODULE_STRING ++ ".erl"
+    end.
+
+process_info_other(Config) when is_list(Config) ->
+    Self = self(),
+    Pid = spawn_link(fun() -> process_info_looper(Self) end),
+    receive after 1 -> ok end,
+    pio_current_location(10000, Pid, 0, 0),
+    pio_current_stacktrace().
+
+pio_current_location(0, _, Pi, Looper) ->
+    io:format("~w call(s) to erlang:process_info/2", [Pi]),
+    io:format("~w call(s) to ~w:process_info_looper/1", [Looper,?MODULE]);
+pio_current_location(N, Pid, Pi, Looper) ->
+    erlang:yield(),
+    {current_location,Where} = process_info(Pid, current_location),
+    case Where of
+	{erlang,process_info,2,[]} ->
+	    pio_current_location(N-1, Pid, Pi+1, Looper);
+	{?MODULE,process_info_looper,1,Loc} when is_list(Loc) ->
+	    pio_current_location(N-1, Pid, Pi, Looper+1)
+    end.
+
+pio_current_stacktrace() ->
+    L = [begin
+	     {current_stacktrace,Stk} = process_info(P, current_stacktrace),
+	     {P,Stk}
+	 end || P <- processes()],
+    [erlang:garbage_collect(P) || {P,_} <- L],
+    erlang:garbage_collect(),
+    [verify_stacktrace(Stk) || {_,Stk} <- L],
+    ok.
+
+verify_stacktrace([{M,F,A,Loc}|T])
+  when is_atom(M),
+       is_atom(F),
+       is_integer(A),
+       is_list(Loc) ->
+    verify_stacktrace(T);
+verify_stacktrace([]) -> ok.
+
+process_info_looper(Parent) ->
+    process_info(Parent, current_location),
+    process_info_looper(Parent).
+
 %% Tests the process_info/1 BIF on another process with messages.
 process_info_other_msg(Config) when is_list(Config) ->
     Self = self(),
diff --git a/erts/emulator/test/trace_local_SUITE.erl b/erts/emulator/test/trace_local_SUITE.erl
index 091e960610..32e2a98e3c 100644
--- a/erts/emulator/test/trace_local_SUITE.erl
+++ b/erts/emulator/test/trace_local_SUITE.erl
@@ -767,8 +767,8 @@ exception_test(Opts, Func0, Args0) ->
 	end,
     
     ?line R1 = exc_slave(ExcOpts, Func, Args),
-    ?line Stack2 = [{?MODULE,exc_top,3},{?MODULE,slave,2}],
-    ?line Stack3 = [{?MODULE,exc,2}|Stack2],
+    ?line Stack2 = [{?MODULE,exc_top,3,[]},{?MODULE,slave,2,[]}],
+    ?line Stack3 = [{?MODULE,exc,2,[]}|Stack2],
     ?line Rs = 
 	case x_exc_top(ExcOpts, Func, Args) of % Emulation
 	    {crash,{Reason,Stack}}=R when is_list(Stack) ->
@@ -789,21 +789,29 @@ exception_test(Opts, Func0, Args0) ->
 	  end,
     ?line expect({nm}).
 
-exception_validate(R1, [R2|Rs]) ->
+exception_validate(R0, Rs0) ->
+    R = clean_location(R0),
+    Rs = [clean_location(E) || E <- Rs0],
+    exception_validate_1(R, Rs).
+
+exception_validate_1(R1, [R2|Rs]) ->
     case [R1|R2] of
 	[R|R] ->
 	    ok;
-	[{crash,{badarg,[{lists,reverse,[L1a,L1b]}|T]}}|
-	 {crash,{badarg,[{lists,reverse,[L2a,L2b]}|T]}}] ->
+	[{crash,{badarg,[{lists,reverse,[L1a,L1b],_}|T]}}|
+	 {crash,{badarg,[{lists,reverse,[L2a,L2b],_}|T]}}] ->
 	    same({crash,{badarg,[{lists,reverse,
-				  [lists:reverse(L1b, L1a),[]]}|T]}},
+				  [lists:reverse(L1b, L1a),[]],[]}|T]}},
 		 {crash,{badarg,[{lists,reverse,
-				  [lists:reverse(L2b, L2a),[]]}|T]}});
+				  [lists:reverse(L2b, L2a),[]],[]}|T]}});
 	_ when is_list(Rs), Rs =/= [] ->
 	    exception_validate(R1, Rs)
     end.
 
-
+clean_location({crash,{Reason,Stk0}}) ->
+    Stk = [{M,F,A,[]} || {M,F,A,_} <- Stk0],
+    {crash,{Reason,Stk}};
+clean_location(Term) -> Term.
 
 %%% Tracee target functions %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %%%
@@ -1057,10 +1065,10 @@ x_exc_exception(_Rtt, M, F, _, Arity, CR) ->
 x_exc_stacktrace() ->
     x_exc_stacktrace(erlang:get_stacktrace()).
 %% Truncate stacktrace to below exc/2
-x_exc_stacktrace([{?MODULE,x_exc,4}|_]) -> [];
-x_exc_stacktrace([{?MODULE,x_exc_func,4}|_]) -> [];
-x_exc_stacktrace([{?MODULE,x_exc_body,4}|_]) -> [];
-x_exc_stacktrace([{?MODULE,exc,2}|_]) -> [];
+x_exc_stacktrace([{?MODULE,x_exc,4,_}|_]) -> [];
+x_exc_stacktrace([{?MODULE,x_exc_func,4,_}|_]) -> [];
+x_exc_stacktrace([{?MODULE,x_exc_body,4,_}|_]) -> [];
+x_exc_stacktrace([{?MODULE,exc,2,_}|_]) -> [];
 x_exc_stacktrace([H|T]) ->
     [H|x_exc_stacktrace(T)].
 
diff --git a/lib/common_test/include/ct.hrl b/lib/common_test/include/ct.hrl
index aa1cc832cf..5a77108e1a 100644
--- a/lib/common_test/include/ct.hrl
+++ b/lib/common_test/include/ct.hrl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2003-2010. All Rights Reserved.
+%% Copyright Ericsson AB 2003-2011. All Rights Reserved.
 %%
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -18,5 +18,4 @@
 %%
 
 -include_lib("test_server/include/test_server.hrl").
--compile({parse_transform,ct_line}).
 
diff --git a/lib/common_test/src/Makefile b/lib/common_test/src/Makefile
index f34adc0a65..5b23558a96 100644
--- a/lib/common_test/src/Makefile
+++ b/lib/common_test/src/Makefile
@@ -39,8 +39,6 @@ RELSYSDIR = $(RELEASE_PATH)/lib/common_test-$(VSN)
 # Target Specs
 # ----------------------------------------------------
 
-PARSE_TRANSFORMS= $(EBIN)/ct_line.$(EMULATOR)
-
 MODULES= \
 	ct \
 	ct_logs \
@@ -98,7 +96,6 @@ ERL_COMPILE_FLAGS += -pa ../ebin -I../include -I $(ERL_TOP)/lib/snmp/include/ \
 # Targets
 # ----------------------------------------------------
 TARGET_FILES = \
-	$(PARSE_TRANSFORMS) \
 	$(GEN_ERL_FILES:%.erl=$(EBIN)/%.$(EMULATOR)) \
 	$(BEAM_FILES) \
 	$(APP_TARGET) $(APPUP_TARGET)
@@ -128,8 +125,6 @@ $(APP_TARGET): $(APP_SRC) ../vsn.mk
 $(APPUP_TARGET): $(APPUP_SRC) ../vsn.mk
 	sed -e 's;%VSN%;$(VSN);' $< > $@
 
-$(BEAM_FILES): $(PARSE_TRANSFORMS)
-
 # ----------------------------------------------------
 # Release Target
 # ---------------------------------------------------- 
diff --git a/lib/common_test/src/common_test.app.src b/lib/common_test/src/common_test.app.src
index b42173f412..57606c01db 100644
--- a/lib/common_test/src/common_test.app.src
+++ b/lib/common_test/src/common_test.app.src
@@ -25,7 +25,6 @@
 	     ct_framework,
 	     ct_ftp,
 	     ct_gen_conn,
-	     ct_line,
 	     ct_logs,
 	     ct_make,
 	     ct_master,
diff --git a/lib/common_test/src/ct_hooks.erl b/lib/common_test/src/ct_hooks.erl
index 984e04b90f..ef7630e051 100644
--- a/lib/common_test/src/ct_hooks.erl
+++ b/lib/common_test/src/ct_hooks.erl
@@ -272,7 +272,7 @@ catch_apply(M,F,A, Default) ->
     catch error:Reason ->
 	    case erlang:get_stacktrace() of
             %% Return the default if it was the CTH module which did not have the function.
-		[{M,F,A}|_] when Reason == undef ->
+		[{M,F,A,_}|_] when Reason == undef ->
 		    Default;
 		Trace ->
 		    ct_logs:log("Suite Hook","Call to CTH failed: ~p:~p",
diff --git a/lib/common_test/src/ct_line.erl b/lib/common_test/src/ct_line.erl
deleted file mode 100644
index 4af9da5463..0000000000
--- a/lib/common_test/src/ct_line.erl
+++ /dev/null
@@ -1,266 +0,0 @@
-%%
-%% %CopyrightBegin%
-%% 
-%% Copyright Ericsson AB 2003-2009. All Rights Reserved.
-%% 
-%% The contents of this file are subject to the Erlang Public License,
-%% Version 1.1, (the "License"); you may not use this file except in
-%% compliance with the License. You should have received a copy of the
-%% Erlang Public License along with this software. If not, it can be
-%% retrieved online at http://www.erlang.org/.
-%% 
-%% Software distributed under the License is distributed on an "AS IS"
-%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
-%% the License for the specific language governing rights and limitations
-%% under the License.
-%% 
-%% %CopyrightEnd%
-%%
-
-%%% @doc Parse transform for inserting line numbers
-
--module(ct_line).
-
--record(vars, {module,                      % atom() Module name
-	       vsn,                         % atom()
-	       
-	       init_info=[],                % [{M,F,A,C,L}]
-
-	       function,                    % atom()
-	       arity,                       % int()
-	       clause,                      % int()
-	       lines,                       % [int()]
-	       depth,                       % int()
-	       is_guard=false               % boolean
-	      }).
-
--export([parse_transform/2,
-	line/1]).
-
-line(LOC={{Mod,Func},_Line}) ->
-    Lines = case get(test_server_loc) of
-		[{{Mod,Func},_}|Ls] -> 
-		    Ls;
-		Ls when is_list(Ls) -> 
-		    case length(Ls) of
-			10 ->
-			    [_|T]=lists:reverse(Ls),
-			    lists:reverse(T);
-			_ ->
-			    Ls
-		    end;
-		_ -> 
-		    [] 
-	    end,
-    put(test_server_loc,[LOC|Lines]).
-
-parse_transform(Forms, _Options) ->
-    transform(Forms, _Options).
-
-%% forms(Fs) -> lists:map(fun (F) -> form(F) end, Fs).
-
-transform(Forms, _Options)->
-    Vars0 = #vars{},
-    {ok, MungedForms, _Vars} = transform(Forms, [], Vars0),
-    MungedForms.
-    
-
-transform([Form|Forms], MungedForms, Vars) ->
-    case munge(Form, Vars) of
-	ignore ->
-	    transform(Forms, MungedForms, Vars);
-	{MungedForm, Vars2} ->
-	    transform(Forms, [MungedForm|MungedForms], Vars2)
-    end;
-transform([], MungedForms, Vars) ->
-    {ok, lists:reverse(MungedForms), Vars}.
-
-%% This code traverses the abstract code, stored as the abstract_code
-%% chunk in the BEAM file, as described in absform(3) for Erlang/OTP R8B
-%% (Vsn=abstract_v2).
-%% The abstract format after preprocessing differs slightly from the abstract
-%% format given eg using epp:parse_form, this has been noted in comments.
-munge(Form={attribute,_,module,Module}, Vars) ->
-    Vars2 = Vars#vars{module=Module},
-    {Form, Vars2};
-
-munge({function,0,module_info,_Arity,_Clauses}, _Vars) ->
-    ignore; % module_info will be added again when the forms are recompiled
-munge({function,Line,Function,Arity,Clauses}, Vars) ->
-    Vars2 = Vars#vars{function=Function,
-		      arity=Arity,
-		      clause=1,
-		      lines=[],
-		      depth=1},
-    {MungedClauses, Vars3} = munge_clauses(Clauses, Vars2, []),
-    {{function,Line,Function,Arity,MungedClauses}, Vars3};
-munge(Form, Vars) -> % attributes
-    {Form, Vars}.
-
-munge_clauses([{clause,Line,Pattern,Guards,Body}|Clauses], Vars, MClauses) ->
-    {MungedGuards, _Vars} = munge_exprs(Guards, Vars#vars{is_guard=true},[]),
-
-    case Vars#vars.depth of
-	1 -> % function clause
-	    {MungedBody, Vars2} = munge_body(Body, Vars#vars{depth=2}, []),
-	    ClauseInfo = {Vars2#vars.module,
-			  Vars2#vars.function,
-			  Vars2#vars.arity,
-			  Vars2#vars.clause,
-			  length(Vars2#vars.lines)},
-	    InitInfo = [ClauseInfo | Vars2#vars.init_info],
-	    Vars3 = Vars2#vars{init_info=InitInfo,
-			       clause=(Vars2#vars.clause)+1,
-			       lines=[],
-			       depth=1},
-	    munge_clauses(Clauses, Vars3,
-			  [{clause,Line,Pattern,MungedGuards,MungedBody}|
-			   MClauses]);
-
-	2 -> % receive-,  case- or if clause
-	    {MungedBody, Vars2} = munge_body(Body, Vars, []),
-	    munge_clauses(Clauses, Vars2,
-			  [{clause,Line,Pattern,MungedGuards,MungedBody}|
-			   MClauses])
-    end;
-munge_clauses([], Vars, MungedClauses) -> 
-    {lists:reverse(MungedClauses), Vars}.
-
-munge_body([Expr|Body], Vars, MungedBody) ->
-    %% Here is the place to add a call to cover:bump/6!
-    Line = element(2, Expr),
-    Lines = Vars#vars.lines,
-    case lists:member(Line,Lines) of
-	true -> % already a bump at this line!
-	    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-	    munge_body(Body, Vars2, [MungedExpr|MungedBody]);
-	false ->
-	    Bump = {call, 0, {remote,0,{atom,0,?MODULE},{atom,0,line}},
-		    [{tuple,0,[{tuple,0,[{atom,0,Vars#vars.module},
-					 {atom, 0, Vars#vars.function}]},
-		     {integer, 0, Line}]}]},
-	    Lines2 = [Line|Lines],
-
-	    {MungedExpr, Vars2} = munge_expr(Expr, Vars#vars{lines=Lines2}),
-	    munge_body(Body, Vars2, [MungedExpr,Bump|MungedBody])
-    end;
-munge_body([], Vars, MungedBody) ->
-    {lists:reverse(MungedBody), Vars}.
-
-munge_expr({match,Line,ExprL,ExprR}, Vars) ->
-    {MungedExprL, Vars2} = munge_expr(ExprL, Vars),
-    {MungedExprR, Vars3} = munge_expr(ExprR, Vars2),
-    {{match,Line,MungedExprL,MungedExprR}, Vars3};
-munge_expr({tuple,Line,Exprs}, Vars) ->
-    {MungedExprs, Vars2} = munge_exprs(Exprs, Vars, []),
-    {{tuple,Line,MungedExprs}, Vars2};
-munge_expr({record,Line,Expr,Exprs}, Vars) ->
-    %% Only for Vsn=raw_abstract_v1
-    {MungedExprName, Vars2} = munge_expr(Expr, Vars),
-    {MungedExprFields, Vars3} = munge_exprs(Exprs, Vars2, []),
-    {{record,Line,MungedExprName,MungedExprFields}, Vars3};
-munge_expr({record_field,Line,ExprL,ExprR}, Vars) ->
-    %% Only for Vsn=raw_abstract_v1
-    {MungedExprL, Vars2} = munge_expr(ExprL, Vars),
-    {MungedExprR, Vars3} = munge_expr(ExprR, Vars2),
-    {{record_field,Line,MungedExprL,MungedExprR}, Vars3};
-munge_expr({cons,Line,ExprH,ExprT}, Vars) ->
-    {MungedExprH, Vars2} = munge_expr(ExprH, Vars),
-    {MungedExprT, Vars3} = munge_expr(ExprT, Vars2),
-    {{cons,Line,MungedExprH,MungedExprT}, Vars3};
-munge_expr({op,Line,Op,ExprL,ExprR}, Vars) ->
-    {MungedExprL, Vars2} = munge_expr(ExprL, Vars),
-    {MungedExprR, Vars3} = munge_expr(ExprR, Vars2),
-    {{op,Line,Op,MungedExprL,MungedExprR}, Vars3};
-munge_expr({op,Line,Op,Expr}, Vars) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    {{op,Line,Op,MungedExpr}, Vars2};
-munge_expr({'catch',Line,Expr}, Vars) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    {{'catch',Line,MungedExpr}, Vars2};
-munge_expr({call,Line1,{remote,Line2,ExprM,ExprF},Exprs},
-	   Vars) when Vars#vars.is_guard==false->
-    {MungedExprM, Vars2} = munge_expr(ExprM, Vars),
-    {MungedExprF, Vars3} = munge_expr(ExprF, Vars2),
-    {MungedExprs, Vars4} = munge_exprs(Exprs, Vars3, []),
-    {{call,Line1,{remote,Line2,MungedExprM,MungedExprF},MungedExprs}, Vars4};
-munge_expr({call,Line1,{remote,_Line2,_ExprM,ExprF},Exprs},
-	   Vars) when Vars#vars.is_guard==true ->
-    %% Difference in abstract format after preprocessing: BIF calls in guards
-    %% are translated to {remote,...} (which is not allowed as source form)
-    %% NOT NECESSARY FOR Vsn=raw_abstract_v1
-    munge_expr({call,Line1,ExprF,Exprs}, Vars);
-munge_expr({call,Line,Expr,Exprs}, Vars) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    {MungedExprs, Vars3} = munge_exprs(Exprs, Vars2, []),
-    {{call,Line,MungedExpr,MungedExprs}, Vars3};
-munge_expr({lc,Line,Expr,LC}, Vars) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    {MungedLC, Vars3} = munge_lc(LC, Vars2, []),
-    {{lc,Line,MungedExpr,MungedLC}, Vars3};
-munge_expr({block,Line,Body}, Vars) ->
-    {MungedBody, Vars2} = munge_body(Body, Vars, []),
-    {{block,Line,MungedBody}, Vars2};
-munge_expr({'if',Line,Clauses}, Vars) -> 
-    {MungedClauses,Vars2} = munge_clauses(Clauses, Vars, []),
-    {{'if',Line,MungedClauses}, Vars2};
-munge_expr({'case',Line,Expr,Clauses}, Vars) ->
-    {MungedExpr,Vars2} = munge_expr(Expr,Vars),
-    {MungedClauses,Vars3} = munge_clauses(Clauses, Vars2, []),
-    {{'case',Line,MungedExpr,MungedClauses}, Vars3};
-munge_expr({'receive',Line,Clauses}, Vars) -> 
-    {MungedClauses,Vars2} = munge_clauses(Clauses, Vars, []),
-    {{'receive',Line,MungedClauses}, Vars2};
-munge_expr({'receive',Line,Clauses,Expr,Body}, Vars) ->
-    {MungedClauses,Vars2} = munge_clauses(Clauses, Vars, []),
-    {MungedExpr, Vars3} = munge_expr(Expr, Vars2),
-    {MungedBody, Vars4} = munge_body(Body, Vars3, []),
-    {{'receive',Line,MungedClauses,MungedExpr,MungedBody}, Vars4};
-munge_expr({'try',Line,Exprs,Clauses,CatchClauses}, Vars) ->
-    {MungedExprs, Vars1} = munge_exprs(Exprs, Vars, []),
-    {MungedClauses, Vars2} = munge_clauses(Clauses, Vars1, []),
-    {MungedCatchClauses, Vars3} = munge_clauses(CatchClauses, Vars2, []),
-    {{'try',Line,MungedExprs,MungedClauses,MungedCatchClauses}, Vars3};
-%% Difference in abstract format after preprocessing: Funs get an extra
-%% element Extra.
-%% NOT NECESSARY FOR Vsn=raw_abstract_v1
-munge_expr({'fun',Line,{function,Name,Arity},_Extra}, Vars) ->
-    {{'fun',Line,{function,Name,Arity}}, Vars};
-munge_expr({'fun',Line,{clauses,Clauses},_Extra}, Vars) ->
-    {MungedClauses,Vars2}=munge_clauses(Clauses, Vars, []),
-    {{'fun',Line,{clauses,MungedClauses}}, Vars2};
-munge_expr({'fun',Line,{clauses,Clauses}}, Vars) ->
-    %% Only for Vsn=raw_abstract_v1
-    {MungedClauses,Vars2}=munge_clauses(Clauses, Vars, []),
-    {{'fun',Line,{clauses,MungedClauses}}, Vars2};
-munge_expr(Form, Vars) -> % var|char|integer|float|string|atom|nil|bin|eof
-    {Form, Vars}.
-
-munge_exprs([Expr|Exprs], Vars, MungedExprs) when Vars#vars.is_guard==true,
-						  is_list(Expr) ->
-    {MungedExpr, _Vars} = munge_exprs(Expr, Vars, []),
-    munge_exprs(Exprs, Vars, [MungedExpr|MungedExprs]);
-munge_exprs([Expr|Exprs], Vars, MungedExprs) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    munge_exprs(Exprs, Vars2, [MungedExpr|MungedExprs]);
-munge_exprs([], Vars, MungedExprs) ->
-    {lists:reverse(MungedExprs), Vars}.
-
-munge_lc([{generate,Line,Pattern,Expr}|LC], Vars, MungedLC) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    munge_lc(LC, Vars2, [{generate,Line,Pattern,MungedExpr}|MungedLC]);
-munge_lc([Expr|LC], Vars, MungedLC) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    munge_lc(LC, Vars2, [MungedExpr|MungedLC]);
-munge_lc([], Vars, MungedLC) ->
-    {lists:reverse(MungedLC), Vars}.
-
-
-
-
-
-
-
-
-
-
diff --git a/lib/common_test/test/ct_error_SUITE.erl b/lib/common_test/test/ct_error_SUITE.erl
index 6867e59b60..836443009f 100644
--- a/lib/common_test/test/ct_error_SUITE.erl
+++ b/lib/common_test/test/ct_error_SUITE.erl
@@ -280,41 +280,21 @@ test_events(cfg_error) ->
      {?eh,tc_start,{cfg_error_2_SUITE,init_per_suite}},
      {?eh,tc_done,
       {cfg_error_2_SUITE,init_per_suite,
-       {failed,{error,{{badmatch,[1,2]},
-		       [{cfg_error_2_SUITE,init_per_suite,1},
-			{test_server,my_apply,3},
-			{test_server,ts_tc,3},
-			{test_server,run_test_case_eval1,6},
-			{test_server,run_test_case_eval,8}]}}}}},
+       {failed,{error,{{badmatch,[1,2]},'_'}}}}},
      {?eh,tc_auto_skip,
       {cfg_error_2_SUITE,tc1,
        {failed,{cfg_error_2_SUITE,init_per_suite,      
-		{'EXIT',{{badmatch,[1,2]},
-			 [{cfg_error_2_SUITE,init_per_suite,1},
-			  {test_server,my_apply,3},
-			  {test_server,ts_tc,3},
-			  {test_server,run_test_case_eval1,6},
-			  {test_server,run_test_case_eval,8}]}}}}}},
+		{'EXIT',{{badmatch,[1,2]},'_'}}}}}},
      {?eh,test_stats,{0,0,{0,3}}},
      {?eh,tc_auto_skip,
       {cfg_error_2_SUITE,tc2,
        {failed,{cfg_error_2_SUITE,init_per_suite,      
-		{'EXIT',{{badmatch,[1,2]},
-			 [{cfg_error_2_SUITE,init_per_suite,1},
-			  {test_server,my_apply,3},
-			  {test_server,ts_tc,3},
-			  {test_server,run_test_case_eval1,6},
-			  {test_server,run_test_case_eval,8}]}}}}}},
+		{'EXIT',{{badmatch,[1,2]},'_'}}}}}},
      {?eh,test_stats,{0,0,{0,4}}},
      {?eh,tc_auto_skip,
       {cfg_error_2_SUITE,end_per_suite,
        {failed,{cfg_error_2_SUITE,init_per_suite,      
-		{'EXIT',{{badmatch,[1,2]},
-			 [{cfg_error_2_SUITE,init_per_suite,1},
-			  {test_server,my_apply,3},
-			  {test_server,ts_tc,3},
-			  {test_server,run_test_case_eval1,6},
-			  {test_server,run_test_case_eval,8}]}}}}}},
+		{'EXIT',{{badmatch,[1,2]},'_'}}}}}},
 
      {?eh,tc_start,{cfg_error_3_SUITE,init_per_suite}},
      {?eh,tc_done,
@@ -373,12 +353,7 @@ test_events(cfg_error) ->
       {?eh,tc_done,{cfg_error_6_SUITE,{end_per_group,g1,[]},ok}}],
      {?eh,tc_start,{cfg_error_6_SUITE,end_per_suite}},
      {?eh,tc_done,{cfg_error_6_SUITE,end_per_suite,
-		   {failed,{error,{{badmatch,[1,2]},
-				   [{cfg_error_6_SUITE,end_per_suite,1},
-				    {test_server,my_apply,3},
-				    {test_server,ts_tc,3},
-				    {test_server,run_test_case_eval1,6},
-				    {test_server,run_test_case_eval,8}]}}}}},
+		   {failed,{error,{{badmatch,[1,2]},'_'}}}}},
 
      {?eh,tc_start,{cfg_error_7_SUITE,init_per_suite}},
      {?eh,tc_done,{cfg_error_7_SUITE,init_per_suite,ok}},
@@ -427,31 +402,16 @@ test_events(cfg_error) ->
      [{?eh,tc_start,{cfg_error_8_SUITE,{init_per_group,g3,[]}}},
       {?eh,tc_done,
        {cfg_error_8_SUITE,{init_per_group,g3,[]},
-	{failed,{error,{{badmatch,42},
-			[{cfg_error_8_SUITE,init_per_group,2},
-			 {test_server,my_apply,3},
-			 {test_server,ts_tc,3},
-			 {test_server,run_test_case_eval1,6},
-			 {test_server,run_test_case_eval,8}]}}}}},
+	{failed,{error,{{badmatch,42},'_'}}}}},
       {?eh,tc_auto_skip,
        {cfg_error_8_SUITE,tc1,
 	{failed,{cfg_error_8_SUITE,init_per_group,
-		 {'EXIT',{{badmatch,42},
-			  [{cfg_error_8_SUITE,init_per_group,2},
-			   {test_server,my_apply,3},
-			   {test_server,ts_tc,3},
-			   {test_server,run_test_case_eval1,6},
-			   {test_server,run_test_case_eval,8}]}}}}}},
+		 {'EXIT',{{badmatch,42},'_'}}}}}},
       {?eh,test_stats,{4,0,{0,13}}},
       {?eh,tc_auto_skip,
        {cfg_error_8_SUITE,end_per_group,
 	{failed,{cfg_error_8_SUITE,init_per_group,
-		 {'EXIT',{{badmatch,42},
-			  [{cfg_error_8_SUITE,init_per_group,2},
-			   {test_server,my_apply,3},
-			   {test_server,ts_tc,3},
-			   {test_server,run_test_case_eval1,6},
-			   {test_server,run_test_case_eval,8}]}}}}}}],
+		 {'EXIT',{{badmatch,42},'_'}}}}}}],
 
      [{?eh,tc_start,{cfg_error_8_SUITE,{init_per_group,g4,[]}}},
       {?eh,tc_done,{cfg_error_8_SUITE,{init_per_group,g4,[]},ok}},
@@ -520,12 +480,7 @@ test_events(cfg_error) ->
      {?eh,tc_start,{cfg_error_9_SUITE,tc3}},
      {?eh,tc_done,{cfg_error_9_SUITE,tc3,
 		   {skipped,{failed,{cfg_error_9_SUITE,init_per_testcase,
-				     {{badmatch,undefined},
-				      [{cfg_error_9_SUITE,init_per_testcase,2},
-				       {test_server,my_apply,3},
-				       {test_server,init_per_testcase,3},
-				       {test_server,run_test_case_eval1,6},
-				       {test_server,run_test_case_eval,8}]}}}}}},
+				     {{badmatch,undefined},'_'}}}}}},
      {?eh,test_stats,{9,0,{0,17}}},
      {?eh,tc_start,{cfg_error_9_SUITE,tc4}},
      {?eh,tc_done,
@@ -640,13 +595,7 @@ test_events(lib_error) ->
      {?eh,tc_done,
       {lib_error_1_SUITE,lines_error,{failed,
 				      {error,
-				       {{badmatch,[1,2]},
-					[{lib_lines,do_error,0},
-					 {lib_error_1_SUITE,lines_error,1},
-					 {test_server,my_apply,3},
-					 {test_server,ts_tc,3},
-					 {test_server,run_test_case_eval1,6},
-					 {test_server,run_test_case_eval,8}]}}}}},
+				       {{badmatch,[1,2]},'_'}}}}},
      {?eh,test_stats,{0,1,{0,0}}},
      {?eh,tc_start,{lib_error_1_SUITE,lines_exit}},
      {?eh,tc_done,
@@ -665,13 +614,7 @@ test_events(lib_error) ->
      {?eh,tc_done,
       {lib_error_1_SUITE,no_lines_error,{failed,
 					 {error,
-					  {{badmatch,[1,2]},
-					   [{lib_no_lines,do_error,0},
-					    {lib_error_1_SUITE,no_lines_error,1},
-					    {test_server,my_apply,3},
-					    {test_server,ts_tc,3},
-					    {test_server,run_test_case_eval1,6},
-					    {test_server,run_test_case_eval,8}]}}}}},
+					  {{badmatch,[1,2]},'_'}}}}},
      {?eh,test_stats,{0,5,{0,0}}},
      {?eh,tc_start,{lib_error_1_SUITE,no_lines_exit}},
      {?eh,tc_done,
diff --git a/lib/common_test/test/ct_repeat_1_SUITE.erl b/lib/common_test/test/ct_repeat_1_SUITE.erl
index 4e842bd6d6..090002d0c2 100644
--- a/lib/common_test/test/ct_repeat_1_SUITE.erl
+++ b/lib/common_test/test/ct_repeat_1_SUITE.erl
@@ -560,12 +560,7 @@ test_events(repeat_cs_until_any_fail) ->
 	{repeat_1_SUITE,tc_fail_1,
 	 {failed,
 	  {error,
-	   {{badmatch,2},
-	    [{repeat_1_SUITE,tc_fail_1,1},
-	     {test_server,my_apply,3},
-	     {test_server,ts_tc,3},
-	     {test_server,run_test_case_eval1,6},
-	     {test_server,run_test_case_eval,8}]}}}}},
+	   {{badmatch,2},'_'}}}}},
        {?eh,test_stats,{5,2,{0,0}}},
        {?eh,tc_start,{repeat_1_SUITE,tc_fail_2}},
        {?eh,tc_done,
diff --git a/lib/common_test/test/ct_skip_SUITE.erl b/lib/common_test/test/ct_skip_SUITE.erl
index 4ba4479208..b8be55f43a 100644
--- a/lib/common_test/test/ct_skip_SUITE.erl
+++ b/lib/common_test/test/ct_skip_SUITE.erl
@@ -197,7 +197,7 @@ test_events(auto_skip) ->
      {?eh,tc_done,
       {auto_skip_3_SUITE,tc1,
        {skipped,{failed,{auto_skip_3_SUITE,init_per_testcase,
-			 {init_per_testcase,tc1,failed}}}}}},
+			 {{init_per_testcase,tc1,failed},'_'}}}}}},
      {?eh,test_stats,{0,0,{0,4}}},
      {?eh,tc_start,{auto_skip_3_SUITE,tc2}},
      {?eh,tc_done,{auto_skip_3_SUITE,tc2,ok}},
@@ -364,12 +364,7 @@ test_events(auto_skip) ->
 	 {?eh,tc_done,
 	  {auto_skip_9_SUITE,tc8,
 	   {skipped,{failed,{auto_skip_9_SUITE,init_per_testcase,
-			     {{badmatch,undefined},
-			      [{auto_skip_9_SUITE,init_per_testcase,2},
-			       {test_server,my_apply,3},
-			       {test_server,init_per_testcase,3},
-			       {test_server,run_test_case_eval1,6},
-			       {test_server,run_test_case_eval,8}]}}}}}},
+			     {{badmatch,undefined},'_'}}}}}},
 	 {?eh,tc_start,
 	  {auto_skip_9_SUITE,{end_per_group,g5,[parallel]}}},
 	 {?eh,tc_done,
diff --git a/lib/compiler/doc/src/compile.xml b/lib/compiler/doc/src/compile.xml
index 830c89ae84..522c1dc411 100644
--- a/lib/compiler/doc/src/compile.xml
+++ b/lib/compiler/doc/src/compile.xml
@@ -395,6 +395,14 @@ module.beam: module.erl \
 	  <code>-compile({no_auto_import,[error/1]}).</code>
 	  </item>
 
+          <tag><c>no_line_info</c></tag>
+
+          <item>
+            <p>Omit line number information in order to produce a slightly
+	      smaller output file.
+	    </p>
+          </item>
+
         </taglist>
 
         <p>If warnings are turned on (the <c>report_warnings</c> option
diff --git a/lib/compiler/src/beam_asm.erl b/lib/compiler/src/beam_asm.erl
index 89d64834cf..6e63c4d0f2 100644
--- a/lib/compiler/src/beam_asm.erl
+++ b/lib/compiler/src/beam_asm.erl
@@ -23,7 +23,7 @@
 -export([module/4]).
 -export([encode/2]).
 
--import(lists, [map/2,member/2,keymember/3,duplicate/2]).
+-import(lists, [map/2,member/2,keymember/3,duplicate/2,splitwith/2]).
 -include("beam_opcodes.hrl").
 
 module(Code, Abst, SourceFile, Opts) ->
@@ -31,22 +31,20 @@ module(Code, Abst, SourceFile, Opts) ->
 
 assemble({Mod,Exp,Attr0,Asm0,NumLabels}, Abst, SourceFile, Opts) ->
     {1,Dict0} = beam_dict:atom(Mod, beam_dict:new()),
+    {0,Dict1} = beam_dict:fname(atom_to_list(Mod) ++ ".erl", Dict0),
     NumFuncs = length(Asm0),
     {Asm,Attr} = on_load(Asm0, Attr0),
-    {Code,Dict1} = assemble_1(Asm, Exp, Dict0, []),
-    build_file(Code, Attr, Dict1, NumLabels, NumFuncs, Abst, SourceFile, Opts).
+    {Code,Dict2} = assemble_1(Asm, Exp, Dict1, []),
+    build_file(Code, Attr, Dict2, NumLabels, NumFuncs, Abst, SourceFile, Opts).
 
 on_load(Fs0, Attr0) ->
     case proplists:get_value(on_load, Attr0) of
 	undefined ->
 	    {Fs0,Attr0};
 	[{Name,0}] ->
-	    Fs = map(fun({function,N,0,Entry,Asm0}) when N =:= Name ->
-			     [{label,_}=L,
-			      {func_info,_,_,_}=Fi,
-			      {label,_}=E|Asm1] = Asm0,
-			     Asm = [L,Fi,E,on_load|Asm1],
-			     {function,N,0,Entry,Asm};
+	    Fs = map(fun({function,N,0,Entry,Is0}) when N =:= Name ->
+			     Is = insert_on_load_instruction(Is0, Entry),
+			     {function,N,0,Entry,Is};
 			(F) ->
 			     F
 		     end, Fs0),
@@ -54,6 +52,13 @@ on_load(Fs0, Attr0) ->
 	    {Fs,Attr}
     end.
 
+insert_on_load_instruction(Is0, Entry) ->
+    {Bef,[{label,Entry}=El|Is]} =
+	splitwith(fun({label,L}) when L =:= Entry -> false;
+		     (_) -> true
+		  end, Is0),
+    Bef ++ [El,on_load|Is].
+
 assemble_1([{function,Name,Arity,Entry,Asm}|T], Exp, Dict0, Acc) ->
     Dict1 = case member({Name,Arity}, Exp) of
 		true ->
@@ -132,7 +137,10 @@ build_file(Code, Attr, Dict, NumLabels, NumFuncs, Abst, SourceFile, Opts) ->
 			   LitTab = iolist_to_binary(zlib:compress(LitTab2)),
 			   chunk(<<"LitT">>, <<(byte_size(LitTab2)):32>>, LitTab)
 		   end,
+
+    %% Create the line chunk.
     
+    LineChunk = chunk(<<"Line">>, build_line_table(Dict)),
 
     %% Create the attributes and compile info chunks.
 
@@ -150,8 +158,11 @@ build_file(Code, Attr, Dict, NumLabels, NumFuncs, Abst, SourceFile, Opts) ->
     %% Create IFF chunk.
 
     Chunks = case member(slim, Opts) of
-		 true -> [Essentials,AttrChunk,AbstChunk];
-		 false -> [Essentials,LocChunk,AttrChunk,CompileChunk,AbstChunk]
+		 true ->
+		     [Essentials,AttrChunk,AbstChunk];
+		 false ->
+		     [Essentials,LocChunk,AttrChunk,
+		      CompileChunk,AbstChunk,LineChunk]
 	     end,
     build_form(<<"BEAM">>, Chunks).
 
@@ -201,6 +212,31 @@ build_attributes(Opts, SourceFile, Attr, Essentials) ->
     Compile = [{options,Opts},{version,?COMPILER_VSN}|Misc],
     {term_to_binary(calc_vsn(Attr, Essentials)),term_to_binary(Compile)}.
 
+build_line_table(Dict) ->
+    {NumLineInstrs,NumFnames0,Fnames0,NumLines,Lines0} =
+	beam_dict:line_table(Dict),
+    NumFnames = NumFnames0 - 1,
+    [_|Fnames1] = Fnames0,
+    Fnames2 = [unicode:characters_to_binary(F) || F <- Fnames1],
+    Fnames = << <<(byte_size(F)):16,F/binary>> || F <- Fnames2 >>,
+    Lines1 = encode_line_items(Lines0, 0),
+    Lines = iolist_to_binary(Lines1),
+    Ver = 0,
+    Bits = 0,
+    <<Ver:32,Bits:32,NumLineInstrs:32,NumLines:32,NumFnames:32,
+     Lines/binary,Fnames/binary>>.
+
+%% encode_line_items([{FnameIndex,Line}], PrevFnameIndex)
+%%  Encode the line items compactly. Tag the FnameIndex with
+%%  an 'a' tag (atom) and only include it when it has changed.
+%%  Tag the line numbers with an 'i' (integer) tag.
+
+encode_line_items([{F,L}|T], F) ->
+    [encode(?tag_i, L)|encode_line_items(T, F)];
+encode_line_items([{F,L}|T], _) ->
+    [encode(?tag_a, F),encode(?tag_i, L)|encode_line_items(T, F)];
+encode_line_items([], _) -> [].
+
 %%
 %% If the attributes contains no 'vsn' attribute, we'll insert one
 %% with an MD5 "checksum" calculated on the code as its value.
@@ -243,6 +279,9 @@ bif_type(_, 2)      -> bif2.
 
 make_op({'%',_}, Dict) ->
     {[],Dict};
+make_op({line,Location}, Dict0) ->
+    {Index,Dict} = beam_dict:line(Location, Dict0),
+    encode_op(line, [Index], Dict);
 make_op({bif, Bif, {f,_}, [], Dest}, Dict) ->
     %% BIFs without arguments cannot fail.
     encode_op(bif0, [{extfunc, erlang, Bif, 0}, Dest], Dict);
diff --git a/lib/compiler/src/beam_block.erl b/lib/compiler/src/beam_block.erl
index c45874597a..432d1e7eea 100644
--- a/lib/compiler/src/beam_block.erl
+++ b/lib/compiler/src/beam_block.erl
@@ -36,13 +36,14 @@ function({function,Name,Arity,CLabel,Is0}, Lc0) ->
 
 	%% Collect basic blocks and optimize them.
 	Is2 = blockify(Is1),
-	Is3 = move_allocates(Is2),
-	Is4 = beam_utils:live_opt(Is3),
-	Is5 = opt_blocks(Is4),
-	Is6 = beam_utils:delete_live_annos(Is5),
+	Is3 = embed_lines(Is2),
+	Is4 = move_allocates(Is3),
+	Is5 = beam_utils:live_opt(Is4),
+	Is6 = opt_blocks(Is5),
+	Is7 = beam_utils:delete_live_annos(Is6),
 
 	%% Optimize bit syntax.
-	{Is,Lc} = bsm_opt(Is6, Lc0),
+	{Is,Lc} = bsm_opt(Is7, Lc0),
 
 	%% Done.
 	{{function,Name,Arity,CLabel,Is},Lc}
@@ -148,6 +149,24 @@ collect(remove_message)      -> {set,[],[],remove_message};
 collect({'catch',R,L})       -> {set,[R],[],{'catch',L}};
 collect(_)                   -> error.
 
+%% embed_lines([Instruction]) -> [Instruction]
+%%  Combine blocks that would be split by line/1 instructions.
+%%  Also move a line instruction before a block into the block,
+%%  but leave the line/1 instruction after a block outside.
+
+embed_lines(Is) ->
+    embed_lines(reverse(Is), []).
+
+embed_lines([{block,B2},{line,_}=Line,{block,B1}|T], Acc) ->
+    B = {block,B1++[{set,[],[],Line}]++B2},
+    embed_lines([B|T], Acc);
+embed_lines([{block,B1},{line,_}=Line|T], Acc) ->
+    B = {block,[{set,[],[],Line}|B1]},
+    embed_lines([B|T], Acc);
+embed_lines([I|Is], Acc) ->
+    embed_lines(Is, [I|Acc]);
+embed_lines([], Acc) -> Acc.
+
 opt_blocks([{block,Bl0}|Is]) ->
     %% The live annotation at the beginning is not useful.
     [{'%live',_}|Bl] = Bl0,
@@ -225,10 +244,12 @@ opt([{set,[Dst],As,{bif,Bif,Fail}}=I1,
  	RevBif -> [{set,[Dst],As,{bif,RevBif,Fail}}|opt(Is)]
     end;
 opt([{set,[X],[X],move}|Is]) -> opt(Is);
-opt([{set,[D1],[{integer,Idx1},Reg],{bif,element,{f,0}}}=I1,
+opt([{set,_,_,{line,_}}=Line1,
+     {set,[D1],[{integer,Idx1},Reg],{bif,element,{f,0}}}=I1,
+     {set,_,_,{line,_}}=Line2,
      {set,[D2],[{integer,Idx2},Reg],{bif,element,{f,0}}}=I2|Is])
   when Idx1 < Idx2, D1 =/= D2, D1 =/= Reg, D2 =/= Reg ->
-    opt([I2,I1|Is]);
+    opt([Line2,I2,Line1,I1|Is]);
 opt([{set,Ds0,Ss,Op}|Is0]) ->	
     {Ds,Is} = opt_moves(Ds0, Is0),
     [{set,Ds,Ss,Op}|opt(Is)];
diff --git a/lib/compiler/src/beam_bsm.erl b/lib/compiler/src/beam_bsm.erl
index 415864b8e9..1217f7f777 100644
--- a/lib/compiler/src/beam_bsm.erl
+++ b/lib/compiler/src/beam_bsm.erl
@@ -20,7 +20,7 @@
 -module(beam_bsm).
 -export([module/2,format_error/1]).
 
--import(lists, [member/2,foldl/3,reverse/1,sort/1,all/2]).
+-import(lists, [member/2,foldl/3,reverse/1,sort/1,all/2,dropwhile/2]).
 
 %%%
 %%% We optimize bit syntax matching where the tail end of a binary is
@@ -376,6 +376,8 @@ btb_reaches_match_2([{func_info,_,_,Arity}=I|_], Regs0, D) ->
 	[] -> D;
 	_ -> {binary_used_in,I}
     end;
+btb_reaches_match_2([{line,_}|Is], Regs, D) ->
+    btb_reaches_match_1(Is, Regs, D);
 btb_reaches_match_2([I|_], Regs, _) ->
     btb_error({btb_context_regs(Regs),I,not_handled}).
 
@@ -580,7 +582,10 @@ btb_index(Fs) ->
     btb_index_1(Fs, []).
 
 btb_index_1([{function,_,_,Entry,Is0}|Fs], Acc0) ->
-    [{label,_},{func_info,_,_,_},{label,Entry}|Is] = Is0,
+    [{label,Entry}|Is] =
+	dropwhile(fun({label,L}) when L =:= Entry -> false;
+		     (_) -> true
+		  end, Is0),
     Acc = btb_index_2(Is, Entry, false, Acc0),
     btb_index_1(Fs, Acc);
 btb_index_1([], Acc) -> gb_trees:from_orddict(sort(Acc)).
diff --git a/lib/compiler/src/beam_clean.erl b/lib/compiler/src/beam_clean.erl
index 64c93e11f7..a7994ab3b3 100644
--- a/lib/compiler/src/beam_clean.erl
+++ b/lib/compiler/src/beam_clean.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2000-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2000-2011. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -23,9 +23,9 @@
 -export([module/2]).
 -export([bs_clean_saves/1]).
 -export([clean_labels/1]).
--import(lists, [map/2,foldl/3,reverse/1]).
+-import(lists, [map/2,foldl/3,reverse/1,filter/2]).
 
-module({Mod,Exp,Attr,Fs0,_}, _Opt) ->
+module({Mod,Exp,Attr,Fs0,_}, Opts) ->
     Order = [Lbl || {function,_,_,Lbl,_} <- Fs0],
     All = foldl(fun({function,_,_,Lbl,_}=Func,D) -> dict:store(Lbl, Func, D) end,
 		dict:new(), Fs0),
@@ -33,7 +33,8 @@ module({Mod,Exp,Attr,Fs0,_}, _Opt) ->
     Used = find_all_used(WorkList, All, sets:from_list(WorkList)),
     Fs1 = remove_unused(Order, Used, All),
     {Fs2,Lc} = clean_labels(Fs1),
-    Fs = bs_fix(Fs2),
+    Fs3 = bs_fix(Fs2),
+    Fs = maybe_remove_lines(Fs3, Opts),
     {ok,{Mod,Exp,Attr,Fs,Lc}}.
 
 %% Remove all bs_save2/2 instructions not referenced by a bs_restore2/2.
@@ -375,3 +376,20 @@ bs_clean_saves_1([{bs_save2,_,{_,_}=SavePoint}=I|Is], Needed, Acc) ->
 bs_clean_saves_1([I|Is], Needed, Acc) ->
     bs_clean_saves_1(Is, Needed, [I|Acc]);
 bs_clean_saves_1([], _, Acc) -> reverse(Acc).
+
+%%%
+%%% Remove line instructions if requested.
+%%%
+
+maybe_remove_lines(Fs, Opts) ->
+    case proplists:get_bool(no_line_info, Opts) of
+	false -> Fs;
+	true -> remove_lines(Fs)
+    end.
+
+remove_lines([{function,N,A,Lbl,Is0}|T]) ->
+    Is = filter(fun({line,_}) -> false;
+		   (_)  -> true
+		end, Is0),
+    [{function,N,A,Lbl,Is}|remove_lines(T)];
+remove_lines([]) -> [].
diff --git a/lib/compiler/src/beam_dead.erl b/lib/compiler/src/beam_dead.erl
index 1365f3d20a..9f81a6ab43 100644
--- a/lib/compiler/src/beam_dead.erl
+++ b/lib/compiler/src/beam_dead.erl
@@ -144,9 +144,9 @@ function({function,Name,Arity,CLabel,Is0}, Lc0) ->
 	%% Initialize label information with the code
 	%% for the func_info label. Without it, a register
 	%% may seem to be live when it is not.
-	[{label,L},{func_info,_,_,_}=FI|_] = Is1,
+	[{label,L}|FiIs] = Is1,
 	D0 = beam_utils:empty_label_index(),
-	D = beam_utils:index_label(L, [FI], D0),
+	D = beam_utils:index_label(L, FiIs, D0),
 
 	%% Optimize away dead code.
 	{Is2,Lc} = forward(Is1, Lc0),
@@ -185,6 +185,8 @@ split_block([{set,[R],As,{alloc,Live,{gc_bif,N,{f,Lbl}=Fail}}}|Is], Bl, Acc)
     split_block(Is, [], [{gc_bif,N,Fail,Live,As,R}|make_block(Bl, Acc)]);
 split_block([{set,[R],[],{'catch',L}}|Is], Bl, Acc) ->
     split_block(Is, [], [{'catch',R,L}|make_block(Bl, Acc)]);
+split_block([{set,[],[],{line,_}=Line}|Is], Bl, Acc) ->
+    split_block(Is, [], [Line|make_block(Bl, Acc)]);
 split_block([I|Is], Bl, Acc) ->
     split_block(Is, [I|Bl], Acc);
 split_block([], Bl, Acc) -> make_block(Bl, Acc).
@@ -406,7 +408,7 @@ backward([{test,Op,{f,To0},Live,Ops0,Dst}|Is], D, Acc) ->
 	 end,
     I = {test,Op,{f,To},Live,Ops0,Dst},
     backward(Is, D, [I|Acc]);
-backward([{kill,_}=I|Is], D, [Exit|_]=Acc) ->
+backward([{kill,_}=I|Is], D, [{line,_},Exit|_]=Acc) ->
     case beam_jump:is_exit_instruction(Exit) of
 	false -> backward(Is, D, [I|Acc]);
 	true -> backward(Is, D, Acc)
@@ -471,7 +473,7 @@ shortcut_fail_label(To0, Reg, Val, D) ->
 
 shortcut_boolean_label(To0, Reg, Bool0, D) when is_boolean(Bool0) ->
     case beam_utils:code_at(To0, D) of
-	[{bif,'not',_,[Reg],Reg},{jump,{f,To}}|_] ->
+	[{line,_},{bif,'not',_,[Reg],Reg},{jump,{f,To}}|_] ->
 	    Bool = not Bool0,
 	    {shortcut_select_label(To, Reg, Bool, D),Bool};
 	_ ->
diff --git a/lib/compiler/src/beam_dict.erl b/lib/compiler/src/beam_dict.erl
index c50ed28aa9..ee76623976 100644
--- a/lib/compiler/src/beam_dict.erl
+++ b/lib/compiler/src/beam_dict.erl
@@ -22,9 +22,10 @@
 
 -export([new/0,opcode/2,highest_opcode/1,
 	 atom/2,local/4,export/4,import/4,
-	 string/2,lambda/5,literal/2,
+	 string/2,lambda/5,literal/2,line/2,fname/2,
 	 atom_table/1,local_table/1,export_table/1,import_table/1,
-	 string_table/1,lambda_table/1,literal_table/1]).
+	 string_table/1,lambda_table/1,literal_table/1,
+	 line_table/1]).
 
 -type label() :: non_neg_integer().
 
@@ -36,6 +37,9 @@
 	 strings = <<>>		    :: binary(),	%String pool
 	 lambdas = [],				%[{...}]
 	 literals = dict:new()	    :: dict(),	%Format: {Literal,Number}
+	 fnames = gb_trees:empty()  :: gb_tree(),       %{Name,Index}
+	 lines = gb_trees:empty()   :: gb_tree(),	%{{Fname,Line},Index}
+	 num_lines = 0		    :: non_neg_integer(), %Number of line instructions
 	 next_import = 0	    :: non_neg_integer(),
 	 string_offset = 0	    :: non_neg_integer(),
 	 next_literal = 0	    :: non_neg_integer(),
@@ -152,6 +156,36 @@ literal(Lit, #asm{literals=Tab0,next_literal=NextIndex}=Dict) ->
 	    {NextIndex,Dict#asm{literals=Tab,next_literal=NextIndex+1}}
     end.
 
+%% Returns the index for a line instruction (adding information
+%% to the location information table).
+-spec line(list(), bdict()) -> {non_neg_integer(), bdict()}.
+
+line([], #asm{num_lines=N}=Dict) ->
+    %% No location available. Return the special pre-defined
+    %% index 0.
+    {0,Dict#asm{num_lines=N+1}};
+line([{location,Name,Line}], #asm{lines=Lines0,num_lines=N}=Dict0) ->
+    {FnameIndex,Dict1} = fname(Name, Dict0),
+    case gb_trees:lookup({FnameIndex,Line}, Lines0) of
+	{value,Index} ->
+	    {Index,Dict1#asm{num_lines=N+1}};
+	none ->
+	    Index = gb_trees:size(Lines0) + 1,
+	    Lines = gb_trees:insert({FnameIndex,Line}, Index, Lines0),
+	    Dict = Dict1#asm{lines=Lines,num_lines=N+1},
+	    {Index,Dict}
+    end.
+
+fname(Name, #asm{fnames=Fnames0}=Dict) ->
+    case gb_trees:lookup(Name, Fnames0) of
+	{value,Index} ->
+	    {Index,Dict};
+	none ->
+	    Index = gb_trees:size(Fnames0),
+	    Fnames = gb_trees:insert(Name, Index, Fnames0),
+	    {Index,Dict#asm{fnames=Fnames}}
+    end.
+
 %% Returns the atom table.
 %%    atom_table(Dict) -> {LastIndex,[Length,AtomString...]}
 -spec atom_table(bdict()) -> {non_neg_integer(), [[non_neg_integer(),...]]}.
@@ -219,6 +253,21 @@ literal_table(#asm{literals=Tab,next_literal=NumLiterals}) ->
 my_term_to_binary(Term) ->
     term_to_binary(Term, [{minor_version,1}]).
 
+%% Return the line table.
+-spec line_table(bdict()) ->
+    {non_neg_integer(),				%Number of line instructions.
+     non_neg_integer(),[string()],
+     non_neg_integer(),[{non_neg_integer(),non_neg_integer()}]}.
+
+line_table(#asm{fnames=Fnames0,lines=Lines0,num_lines=NumLineInstrs}) ->
+    NumFnames = gb_trees:size(Fnames0),
+    Fnames1 = lists:keysort(2, gb_trees:to_list(Fnames0)),
+    Fnames = [Name || {Name,_} <- Fnames1],
+    NumLines = gb_trees:size(Lines0),
+    Lines1 = lists:keysort(2, gb_trees:to_list(Lines0)),
+    Lines = [L || {L,_} <- Lines1],
+    {NumLineInstrs,NumFnames,Fnames,NumLines,Lines}.
+
 %% Search for binary string Str in the binary string pool Pool.
 %%    old_string(Str, Pool) -> none | Index
 -spec old_string(binary(), binary()) -> 'none' | pos_integer().
diff --git a/lib/compiler/src/beam_disasm.erl b/lib/compiler/src/beam_disasm.erl
index 017ca129b0..410233a0f7 100644
--- a/lib/compiler/src/beam_disasm.erl
+++ b/lib/compiler/src/beam_disasm.erl
@@ -296,6 +296,8 @@ get_function_chunks(Code) ->
 labels_r([], R) -> {R, []};
 labels_r([{label,_}=I|Is], R) ->
     labels_r(Is, [I|R]);
+labels_r([{line,_}=I|Is], R) ->
+    labels_r(Is, [I|R]);
 labels_r(Is, R) -> {R, Is}.
 
 get_funs({[],[]}) -> [];
@@ -335,20 +337,17 @@ local_labels(Funs) ->
 				   local_labels_1(function__code(F), R)
 			   end, [], Funs)).
 
-%% The first clause below attempts to provide some (limited form of)
-%% backwards compatibility; it is not needed for .beam files generated
-%% by the R8 compiler.  The clause should one fine day be taken out.
-local_labels_1([{label,_}|[{label,_}|_]=Code], R) ->
-    local_labels_1(Code, R);
-local_labels_1([{label,_},{func_info,{atom,M},{atom,F},A}|Code], R)
-  when is_atom(M), is_atom(F) ->
-    local_labels_2(Code, R, M, F, A);
-local_labels_1(Code, _) ->
-    ?exit({'local_labels: no label in code',Code}).
+local_labels_1(Code0, R) ->
+    Code1 = lists:dropwhile(fun({label,_}) -> true;
+			       ({line,_}) -> true;
+			       ({func_info,_,_,_}) -> false
+			    end, Code0),
+    [{func_info,{atom,M},{atom,F},A}|Code] = Code1,
+    local_labels_2(Code, R, {M,F,A}).
 
-local_labels_2([{label,[{u,L}]}|Code], R, M, F, A) ->
-    local_labels_2(Code, [{L,{M,F,A}}|R], M, F, A);
-local_labels_2(_, R, _, _, _) -> R.
+local_labels_2([{label,[{u,L}]}|Code], R, MFA) ->
+    local_labels_2(Code, [{L,MFA}|R], MFA);
+local_labels_2(_, R, _) -> R.
 
 %%-----------------------------------------------------------------------
 %% Disassembles a single BEAM instruction; most instructions are handled
@@ -1105,6 +1104,12 @@ resolve_inst({recv_set,[Lbl]},_,_,_) ->
     {recv_set,Lbl};
 
 %%
+%% R15A.
+%%
+resolve_inst({line,[Index]},_,_,_) ->
+    {line,resolve_arg(Index)};
+
+%%
 %% Catches instructions that are not yet handled.
 %%
 resolve_inst(X,_,_,_) -> ?exit({resolve_inst,X}).
diff --git a/lib/compiler/src/beam_jump.erl b/lib/compiler/src/beam_jump.erl
index 3cab55c4cb..537f8ca81b 100644
--- a/lib/compiler/src/beam_jump.erl
+++ b/lib/compiler/src/beam_jump.erl
@@ -169,7 +169,7 @@ share_1([{label,L}=Lbl|Is], Dict0, Seq, Acc) ->
 	    share_1(Is, Dict0, [], [Lbl,{jump,{f,Label}}|Acc])
     end;
 share_1([{func_info,_,_,_}=I|Is], _, [], Acc) ->
-    Is++[I|Acc];
+    reverse(Is, [I|Acc]);
 share_1([I|Is], Dict, Seq, Acc) ->
     case is_unreachable_after(I) of
 	false ->
@@ -206,25 +206,35 @@ is_label(_) -> false.
 move(Is) ->
     move_1(Is, [], []).
 
-move_1([I|Is], End, Acc) ->
+move_1([I|Is], End0, Acc0) ->
     case is_exit_instruction(I) of
-	false -> move_1(Is, End, [I|Acc]);
-	true -> move_2(I, Is, End, Acc)
+	false ->
+	    move_1(Is, End0, [I|Acc0]);
+	true ->
+	    case extract_seq(Acc0, [I|End0]) of
+		no ->
+		    move_1(Is, End0, [I|Acc0]);
+		{yes,End,Acc} ->
+		    move_1(Is, End, Acc)
+	    end
     end;
-move_1([], End, Acc) ->
-    reverse(Acc, reverse(End)).
-
-move_2(Exit, Is, End, [{block,_},{label,_},{func_info,_,_,_}|_]=Acc) ->
-    move_1(Is, End, [Exit|Acc]);
-move_2(Exit, Is, End, [{block,_}=Blk,{label,_}=Lbl,Unreachable|More]) ->
-    move_1([Unreachable|Is], [Exit,Blk,Lbl|End], More);
-move_2(Exit, Is, End, [{bs_context_to_binary,_}=Bs,{label,_}=Lbl,
-		       Unreachable|More]) ->
-    move_1([Unreachable|Is], [Exit,Bs,Lbl|End], More);
-move_2(Exit, Is, End, [{label,_}=Lbl,Unreachable|More]) ->
-    move_1([Unreachable|Is], [Exit,Lbl|End], More);
-move_2(Exit, Is, End, Acc) ->
-    move_1(Is, End, [Exit|Acc]).
+move_1([], End, Acc) -> reverse(Acc, End).
+
+extract_seq([{line,_}=Line|Is], Acc) ->
+    extract_seq(Is, [Line|Acc]);
+extract_seq([{block,_}=Bl|Is], Acc) ->
+    extract_seq_1(Is, [Bl|Acc]);
+extract_seq([{label,_}|_]=Is, Acc) ->
+    extract_seq_1(Is, Acc);
+extract_seq(_, _) -> no.
+
+extract_seq_1([{line,_}=Line|Is], Acc) ->
+    extract_seq_1(Is, [Line|Acc]);
+extract_seq_1([{label,_},{func_info,_,_,_}|_], _) ->
+    no;
+extract_seq_1([{label,_}=Lbl|Is], Acc) ->
+    {yes,[Lbl|Acc],Is};
+extract_seq_1(_, _) -> no.
 
 %%%
 %%% (3) (4) (5) (6) Jump and unreachable code optimizations.
@@ -454,6 +464,7 @@ is_label_used_in_2({set,_,_,Info}, Lbl) ->
 	{put_tuple,_} -> false;
 	{get_tuple_element,_} -> false;
 	{set_tuple_element,_} -> false;
+	{line,_} -> false;
 	_ when is_atom(Info) -> false
     end.
 
@@ -487,6 +498,8 @@ rem_unused([], _, Acc) -> reverse(Acc).
 initial_labels(Is) ->
     initial_labels(Is, []).
 
+initial_labels([{line,_}|Is], Acc) ->
+    initial_labels(Is, Acc);
 initial_labels([{label,Lbl}|Is], Acc) ->
     initial_labels(Is, [Lbl|Acc]);
 initial_labels([{func_info,_,_,_},{label,Lbl}|_], Acc) ->
diff --git a/lib/compiler/src/beam_listing.erl b/lib/compiler/src/beam_listing.erl
index be7b14c3dd..2941f6135c 100644
--- a/lib/compiler/src/beam_listing.erl
+++ b/lib/compiler/src/beam_listing.erl
@@ -61,7 +61,7 @@ print_op(Stream, Label) when element(1, Label) == label ->
 print_op(Stream, Op) ->
     io:format(Stream, "    ~p.\n", [Op]).
 
-function(File, {function,Name,Arity,Args,Body,Vdb}) ->
+function(File, {function,Name,Arity,Args,Body,Vdb,_Anno}) ->
     io:nl(File),
     io:format(File, "function ~p/~p.\n", [Name,Arity]),
     io:format(File, " ~p.\n", [Args]),
diff --git a/lib/compiler/src/beam_receive.erl b/lib/compiler/src/beam_receive.erl
index 9ed44ad5d7..c483d85a97 100644
--- a/lib/compiler/src/beam_receive.erl
+++ b/lib/compiler/src/beam_receive.erl
@@ -175,6 +175,8 @@ opt_update_regs({label,Lbl}, R, L) ->
     end;
 opt_update_regs({try_end,_}, R, L) ->
     {R,L};
+opt_update_regs({line,_}, R, L) ->
+    {R,L};
 opt_update_regs(_I, _R, L) ->
     %% Unrecognized instruction. Abort the search.
     {regs_init(),L}.
diff --git a/lib/compiler/src/beam_trim.erl b/lib/compiler/src/beam_trim.erl
index 790aba0a9a..25e6ffbb73 100644
--- a/lib/compiler/src/beam_trim.erl
+++ b/lib/compiler/src/beam_trim.erl
@@ -222,7 +222,9 @@ remap([{call_last,Ar,Name,N}|Is], Map, Acc) ->
     reverse(Acc, [I|Is]);
 remap([{call_ext_last,Ar,Name,N}|Is], Map, Acc) ->
     I = {call_ext_last,Ar,Name,Map({frame_size,N})},
-    reverse(Acc, [I|Is]).
+    reverse(Acc, [I|Is]);
+remap([{line,_}=I|Is], Map, Acc) ->
+    remap(Is, Map, [I|Acc]).
     
 remap_block([{set,Ds0,Ss0,Info}|Is], Map, Acc) ->
     Ds = [Map(D) || D <- Ds0],
@@ -230,14 +232,15 @@ remap_block([{set,Ds0,Ss0,Info}|Is], Map, Acc) ->
     remap_block(Is, Map, [{set,Ds,Ss,Info}|Acc]);
 remap_block([], _, Acc) -> reverse(Acc).
     
-safe_labels([{label,L},{badmatch,{Tag,_}}|Is], Acc) when Tag =/= y ->
+safe_labels([{label,L},{line,_},{badmatch,{Tag,_}}|Is], Acc) when Tag =/= y ->
     safe_labels(Is, [L|Acc]);
-safe_labels([{label,L},{case_end,{Tag,_}}|Is], Acc) when Tag =/= y ->
+safe_labels([{label,L},{line,_},{case_end,{Tag,_}}|Is], Acc) when Tag =/= y ->
     safe_labels(Is, [L|Acc]);
-safe_labels([{label,L},if_end|Is], Acc) ->
+safe_labels([{label,L},{line,_},if_end|Is], Acc) ->
     safe_labels(Is, [L|Acc]);
 safe_labels([{label,L},
 	     {block,[{set,[{x,0}],[{Tag,_}],move}]},
+	     {line,_},
 	     {call_ext,1,{extfunc,erlang,error,1}}|Is], Acc) when Tag =/= y ->
     safe_labels(Is, [L|Acc]);
 safe_labels([_|Is], Acc) ->
@@ -321,6 +324,8 @@ frame_size([{make_fun2,_,_,_,_}|Is], Safe) ->
 frame_size([{deallocate,N}|_], _) -> N;
 frame_size([{call_last,_,_,N}|_], _) -> N;
 frame_size([{call_ext_last,_,_,N}|_], _) -> N;
+frame_size([{line,_}|Is], Safe) ->
+    frame_size(Is, Safe);
 frame_size([_|_], _) -> throw(not_possible).
 
 frame_size_branch(0, Is, Safe) ->
diff --git a/lib/compiler/src/beam_type.erl b/lib/compiler/src/beam_type.erl
index f83f73b224..7fdb8d072a 100644
--- a/lib/compiler/src/beam_type.erl
+++ b/lib/compiler/src/beam_type.erl
@@ -400,6 +400,7 @@ update({call_ext,3,{extfunc,erlang,setelement,3}}, Ts0) ->
 update({call,_Arity,_Func}, Ts) -> tdb_kill_xregs(Ts);
 update({call_ext,_Arity,_Func}, Ts) -> tdb_kill_xregs(Ts);
 update({make_fun2,_,_,_,_}, Ts) -> tdb_kill_xregs(Ts);
+update({line,_}, Ts) -> Ts;
 
 %% The instruction is unknown.  Kill all information.
 update(_I, _Ts) -> tdb_new().
diff --git a/lib/compiler/src/beam_utils.erl b/lib/compiler/src/beam_utils.erl
index 45cdf8a659..f281ad5eac 100644
--- a/lib/compiler/src/beam_utils.erl
+++ b/lib/compiler/src/beam_utils.erl
@@ -26,7 +26,7 @@
 	 code_at/2,bif_to_test/3,is_pure_test/1,
 	 live_opt/1,delete_live_annos/1,combine_heap_needs/2]).
 
--import(lists, [member/2,sort/1,reverse/1]).
+-import(lists, [member/2,sort/1,reverse/1,splitwith/2]).
 
 -record(live,
 	{bl,					%Block check fun.
@@ -195,10 +195,14 @@ is_pure_test({test,Op,_,Ops}) ->
 %%  Also insert {'%live',Live} annotations at the beginning
 %%  and end of each block.
 %%
-live_opt([{label,Fail}=I1,
-	  {func_info,_,_,Live}=I2|Is]) ->
+live_opt(Is0) ->
+    {[{label,Fail}|_]=Bef,[Fi|Is]} =
+	splitwith(fun({func_info,_,_,_}) -> false;
+		     (_) -> true
+		  end, Is0),
+    {func_info,_,_,Live} = Fi,
     D = gb_trees:insert(Fail, live_call(Live), gb_trees:empty()),
-    [I1,I2|live_opt(reverse(Is), 0, D, [])].
+    Bef ++ [Fi|live_opt(reverse(Is), 0, D, [])].
 
 
 %% delete_live_annos([Instruction]) -> [Instruction].
@@ -499,6 +503,8 @@ check_liveness(R, [{loop_rec,{f,_},{x,0}}|_], St) ->
     end;
 check_liveness(R, [{loop_rec_end,{f,Fail}}|_], St) ->
     check_liveness_at(R, Fail, St);
+check_liveness(R, [{line,_}|Is], St) ->
+    check_liveness(R, Is, St);
 check_liveness(_R, Is, St) when is_list(Is) ->
 %%     case Is of
 %% 	[I|_] ->
@@ -799,6 +805,8 @@ live_opt([{wait,_}=I|Is], Regs, D, Acc) ->
     live_opt(Is, Regs, D, [I|Acc]);
 live_opt([{wait_timeout,_,{Tag,_}}=I|Is], Regs, D, Acc) when Tag =/= x ->
     live_opt(Is, Regs, D, [I|Acc]);
+live_opt([{line,_}=I|Is], Regs, D, Acc) ->
+    live_opt(Is, Regs, D, [I|Acc]);
 
 %% The following instructions can occur if the "compilation" has been
 %% started from a .S file using the 'asm' option.
diff --git a/lib/compiler/src/beam_validator.erl b/lib/compiler/src/beam_validator.erl
index fb267b35b6..fe3b1680d9 100644
--- a/lib/compiler/src/beam_validator.erl
+++ b/lib/compiler/src/beam_validator.erl
@@ -166,12 +166,17 @@ validate(Module, Fs) ->
     Ft = index_bs_start_match(Fs, []),
     validate_0(Module, Fs, Ft).
 
-index_bs_start_match([{function,_,_,Entry,Code}|Fs], Acc0) ->
+index_bs_start_match([{function,_,_,Entry,Code0}|Fs], Acc0) ->
+    Code = dropwhile(fun({label,L}) when L =:= Entry -> false;
+			(_) -> true
+		     end, Code0),
     case Code of
-	[_,_,{label,Entry}|Is] ->
+	[{label,Entry}|Is] ->
 	    Acc = index_bs_start_match_1(Is, Entry, Acc0),
 	    index_bs_start_match(Fs, Acc);
 	_ ->
+	    %% Something serious is wrong. Ignore it for now.
+	    %% It will be detected and diagnosed later.
 	    index_bs_start_match(Fs, Acc0)
     end;
 index_bs_start_match([], Acc) ->
@@ -292,6 +297,8 @@ labels(Is) ->
 
 labels_1([{label,L}|Is], R) ->
     labels_1(Is, [L|R]);
+labels_1([{line,_}|Is], R) ->
+    labels_1(Is, R);
 labels_1(Is, R) ->
     {lists:reverse(R),Is}.
 
@@ -433,6 +440,8 @@ valfun_1(remove_message, Vst) ->
     Vst;
 valfun_1({'%',_}, Vst) ->
     Vst;
+valfun_1({line,_}, Vst) ->
+    Vst;
 %% Exception generating calls
 valfun_1({call_ext,Live,Func}=I, Vst) ->
     case return_type(Func, Vst) of
@@ -870,6 +879,8 @@ val_dsetel({set_tuple_element,_,_,_}, #vst{current=#st{setelem=false}}) ->
     error(illegal_context_for_set_tuple_element);
 val_dsetel({set_tuple_element,_,_,_}, #vst{current=#st{setelem=true}}=Vst) ->
     Vst;
+val_dsetel({line,_}, Vst) ->
+    Vst;
 val_dsetel(_, #vst{current=#st{setelem=true}=St}=Vst) ->
     Vst#vst{current=St#st{setelem=false}};
 val_dsetel(_, Vst) -> Vst.
diff --git a/lib/compiler/src/compile.erl b/lib/compiler/src/compile.erl
index ce8a5bf864..29c7ec0dcd 100644
--- a/lib/compiler/src/compile.erl
+++ b/lib/compiler/src/compile.erl
@@ -171,9 +171,9 @@ expand_opt(report, Os) ->
 expand_opt(return, Os) ->
     [return_errors,return_warnings|Os];
 expand_opt(r12, Os) ->
-    [no_recv_opt|Os];
+    [no_recv_opt,no_line_info|Os];
 expand_opt(r13, Os) ->
-    [no_recv_opt|Os];
+    [no_recv_opt,no_line_info|Os];
 expand_opt({debug_info_key,_}=O, Os) ->
     [encrypt_debug_info,O|Os];
 expand_opt(no_float_opt, Os) ->
@@ -1426,6 +1426,8 @@ iofile(File) when is_atom(File) ->
 iofile(File) ->
     {filename:dirname(File), filename:basename(File, ".erl")}.
 
+erlfile(".", Base, Suffix) ->
+    Base ++ Suffix;
 erlfile(Dir, Base, Suffix) ->
     filename:join(Dir, Base ++ Suffix).
 
diff --git a/lib/compiler/src/genop.tab b/lib/compiler/src/genop.tab
index 63527bda8f..39c1e8297f 100644
--- a/lib/compiler/src/genop.tab
+++ b/lib/compiler/src/genop.tab
@@ -280,3 +280,7 @@ BEAM_FORMAT_NUMBER=0
 150: recv_mark/1
 151: recv_set/1
 152: gc_bif3/7
+
+# R15A
+
+153: line/1
diff --git a/lib/compiler/src/v3_codegen.erl b/lib/compiler/src/v3_codegen.erl
index 55e3c58d2a..e7dae67085 100644
--- a/lib/compiler/src/v3_codegen.erl
+++ b/lib/compiler/src/v3_codegen.erl
@@ -79,9 +79,10 @@ module({Mod,Exp,Attr,Forms}, Options) ->
 functions(Forms, AtomMod) ->
     mapfoldl(fun (F, St) -> function(F, AtomMod, St) end, #cg{lcount=1}, Forms).
 
-function({function,Name,Arity,Asm0,Vb,Vdb}, AtomMod, St0) ->
+function({function,Name,Arity,Asm0,Vb,Vdb,Anno}, AtomMod, St0) ->
     try
-	{Asm,EntryLabel,St} = cg_fun(Vb, Asm0, Vdb, AtomMod, {Name,Arity}, St0),
+	{Asm,EntryLabel,St} = cg_fun(Vb, Asm0, Vdb, AtomMod,
+				     {Name,Arity}, Anno, St0),
 	Func = {function,Name,Arity,EntryLabel,Asm},
 	{Func,St}
     catch
@@ -93,7 +94,7 @@ function({function,Name,Arity,Asm0,Vb,Vdb}, AtomMod, St0) ->
 
 %% cg_fun([Lkexpr], [HeadVar], Vdb, State) -> {[Ainstr],State}
 
-cg_fun(Les, Hvs, Vdb, AtomMod, NameArity, St0) ->
+cg_fun(Les, Hvs, Vdb, AtomMod, NameArity, Anno, St0) ->
     {Fi,St1} = new_label(St0),			%FuncInfo label
     {Fl,St2} = local_func_label(NameArity, St1),
 
@@ -129,7 +130,7 @@ cg_fun(Les, Hvs, Vdb, AtomMod, NameArity, St0) ->
 				 ultimate_failure=UltimateMatchFail,
 				 is_top_block=true}),
     {Name,Arity} = NameArity,
-    Asm = [{label,Fi},{func_info,AtomMod,{atom,Name},Arity},
+    Asm = [{label,Fi},line(Anno),{func_info,AtomMod,{atom,Name},Arity},
 	   {label,Fl}|B++[{label,UltimateMatchFail},if_end]],
     {Asm,Fl,St}.
 
@@ -307,23 +308,23 @@ match_fail_cg({badmatch,Term}, Le, Vdb, Bef, St) ->
     R = cg_reg_arg(Term, Bef),
     Int0 = clear_dead(Bef, Le#l.i, Vdb),
     {Sis,Int} = adjust_stack(Int0, Le#l.i, Le#l.i+1, Vdb),
-    {Sis ++ [{badmatch,R}],
+    {Sis ++ [line(Le),{badmatch,R}],
      Int#sr{reg=clear_regs(Int0#sr.reg)},St};
 match_fail_cg({case_clause,Reason}, Le, Vdb, Bef, St) ->
     R = cg_reg_arg(Reason, Bef),
     Int0 = clear_dead(Bef, Le#l.i, Vdb),
     {Sis,Int} = adjust_stack(Int0, Le#l.i, Le#l.i+1, Vdb),
-    {Sis++[{case_end,R}],
+    {Sis++[line(Le),{case_end,R}],
      Int#sr{reg=clear_regs(Bef#sr.reg)},St};
 match_fail_cg(if_clause, Le, Vdb, Bef, St) ->
     Int0 = clear_dead(Bef, Le#l.i, Vdb),
     {Sis,Int1} = adjust_stack(Int0, Le#l.i, Le#l.i+1, Vdb),
-    {Sis++[if_end],Int1#sr{reg=clear_regs(Int1#sr.reg)},St};
+    {Sis++[line(Le),if_end],Int1#sr{reg=clear_regs(Int1#sr.reg)},St};
 match_fail_cg({try_clause,Reason}, Le, Vdb, Bef, St) ->
     R = cg_reg_arg(Reason, Bef),
     Int0 = clear_dead(Bef, Le#l.i, Vdb),
     {Sis,Int} = adjust_stack(Int0, Le#l.i, Le#l.i+1, Vdb),
-    {Sis ++ [{try_case_end,R}],
+    {Sis ++ [line(Le),{try_case_end,R}],
      Int#sr{reg=clear_regs(Int0#sr.reg)},St}.
 
 %% bsm_rename_ctx([Clause], Var) -> [Clause]
@@ -1047,7 +1048,7 @@ call_cg({var,_V} = Var, As, Rs, Le, Vdb, Bef, St0) ->
     %% Build complete code and final stack/register state.
     Arity = length(As),
     {Frees,Aft} = free_dead(clear_dead(Int#sr{reg=Reg}, Le#l.i, Vdb)),
-    {Sis ++ Frees ++ [{call_fun,Arity}],Aft,
+    {Sis ++ Frees ++ [line(Le),{call_fun,Arity}],Aft,
      need_stack_frame(St0)};
 call_cg({remote,Mod,Name}, As, Rs, Le, Vdb, Bef, St0)
   when element(1, Mod) =:= var;
@@ -1057,11 +1058,10 @@ call_cg({remote,Mod,Name}, As, Rs, Le, Vdb, Bef, St0)
     Reg = load_vars(Rs, clear_regs(Int#sr.reg)),
     %% Build complete code and final stack/register state.
     Arity = length(As),
-    Call = {apply,Arity},
     St = need_stack_frame(St0),
     %%{Call,St1} = build_call(Func, Arity, St0),
     {Frees,Aft} = free_dead(clear_dead(Int#sr{reg=Reg}, Le#l.i, Vdb)),
-    {Sis ++ Frees ++ [Call],Aft,St};
+    {Sis ++ Frees ++ [line(Le),{apply,Arity}],Aft,St};
 call_cg(Func, As, Rs, Le, Vdb, Bef, St0) ->
     case St0 of
 	#cg{bfail=Fail} when Fail =/= 0 ->
@@ -1091,7 +1091,7 @@ call_cg(Func, As, Rs, Le, Vdb, Bef, St0) ->
 	    Arity = length(As),
 	    {Call,St1} = build_call(Func, Arity, St0),
 	    {Frees,Aft} = free_dead(clear_dead(Int#sr{reg=Reg}, Le#l.i, Vdb)),
-	    {Sis ++ Frees ++ Call,Aft,St1}
+	    {Sis ++ Frees ++ [line(Le)|Call],Aft,St1}
     end.
 
 build_call({remote,{atom,erlang},{atom,'!'}}, 2, St0) ->
@@ -1118,7 +1118,7 @@ enter_cg({var,_V} = Var, As, Le, Vdb, Bef, St0) ->
     {Sis,Int} = cg_setup_call(As++[Var], Bef, Le#l.i, Vdb),
     %% Build complete code and final stack/register state.
     Arity = length(As),
-    {Sis ++ [{call_fun,Arity},return],
+    {Sis ++ [line(Le),{call_fun,Arity},return],
      clear_dead(Int#sr{reg=clear_regs(Int#sr.reg)}, Le#l.i, Vdb),
      need_stack_frame(St0)};
 enter_cg({remote,Mod,Name}, As, Le, Vdb, Bef, St0)
@@ -1127,9 +1127,8 @@ enter_cg({remote,Mod,Name}, As, Le, Vdb, Bef, St0)
     {Sis,Int} = cg_setup_call(As++[Mod,Name], Bef, Le#l.i, Vdb),
     %% Build complete code and final stack/register state.
     Arity = length(As),
-    Call = {apply_only,Arity},
     St = need_stack_frame(St0),
-    {Sis ++ [Call],
+    {Sis ++ [line(Le),{apply_only,Arity}],
      clear_dead(Int#sr{reg=clear_regs(Int#sr.reg)}, Le#l.i, Vdb),
      St};
 enter_cg(Func, As, Le, Vdb, Bef, St0) ->
@@ -1137,7 +1136,8 @@ enter_cg(Func, As, Le, Vdb, Bef, St0) ->
     %% Build complete code and final stack/register state.
     Arity = length(As),
     {Call,St1} = build_enter(Func, Arity, St0),
-    {Sis ++ Call,
+    Line = enter_line(Func, Arity, Le),
+    {Sis ++ Line ++ Call,
      clear_dead(Int#sr{reg=clear_regs(Int#sr.reg)}, Le#l.i, Vdb),
      St1}.
 
@@ -1153,6 +1153,23 @@ build_enter(Name, Arity, St0) when is_atom(Name) ->
     {Lbl,St1} = local_func_label(Name, Arity, St0),
     {[{call_only,Arity,{f,Lbl}}],St1}.
 
+enter_line({remote,{atom,Mod},{atom,Name}}, Arity, Le) ->
+    case erl_bifs:is_safe(Mod, Name, Arity) of
+	false ->
+	    %% Tail-recursive call, possibly to a BIF.
+	    %% We'll need a line instruction in case the
+	    %% BIF call fails.
+	    [line(Le)];
+	true ->
+	    %% Call to a safe BIF. Since it cannot fail,
+	    %% we don't need any line instruction here.
+	    []
+    end;
+enter_line(_, _, _) ->
+    %% Tail-recursive call to a local function. A line
+    %% instruction will not be useful.
+    [].
+
 %% local_func_label(Name, Arity, State) -> {Label,State'}
 %% local_func_label({Name,Arity}, State) -> {Label,State'}
 %%  Get the function entry label for a local function.
@@ -1226,9 +1243,10 @@ bif_cg(Bif, As, [{var,V}], Le, Vdb, Bef, St0) ->
     %%   Currently, we are somewhat pessimistic in
     %% that we save any variable that will be live after this BIF call.
 
+    MayFail = not erl_bifs:is_safe(erlang, Bif, length(As)),
     {Sis,Int0} = case St0#cg.in_catch andalso
 		     St0#cg.bfail =:= 0 andalso
-		     not erl_bifs:is_safe(erlang, Bif, length(As)) of
+		     MayFail of
 		     true -> adjust_stack(Bef, Le#l.i, Le#l.i+1, Vdb);
 		     false -> {[],Bef}
 		 end,
@@ -1237,7 +1255,14 @@ bif_cg(Bif, As, [{var,V}], Le, Vdb, Bef, St0) ->
     Int = Int1#sr{reg=Reg},
     Dst = fetch_reg(V, Reg),
     BifFail = {f,St0#cg.bfail},
-    {Sis++[{bif,Bif,BifFail,Ars,Dst}],
+    %% We need a line instructions for BIFs that may fail in a body.
+    Line = case BifFail of
+	       {f,0} when MayFail ->
+		   [line(Le)];
+	       _ ->
+		   []
+	   end,
+    {Sis++Line++[{bif,Bif,BifFail,Ars,Dst}],
      clear_dead(Int, Le#l.i, Vdb), St0}.
 
 
@@ -1266,7 +1291,11 @@ gc_bif_cg(Bif, As, [{var,V}], Le, Vdb, Bef, St0) ->
     Int = Int1#sr{reg=Reg},
     Dst = fetch_reg(V, Reg),
     BifFail = {f,St0#cg.bfail},
-    {Sis++[{gc_bif,Bif,BifFail,max_reg(Bef#sr.reg),Ars,Dst}],
+    Line = case BifFail of
+	       {f,0} -> [line(Le)];
+	       {f,_} -> []
+	   end,
+    {Sis++Line++[{gc_bif,Bif,BifFail,max_reg(Bef#sr.reg),Ars,Dst}],
      clear_dead(Int, Le#l.i, Vdb), St0}.
 
 %% recv_loop_cg(TimeOut, ReceiveVar, ReceiveMatch, TimeOutExprs,
@@ -1284,7 +1313,7 @@ recv_loop_cg(Te, Rvar, Rm, Tes, Rs, Le, Vdb, Bef, St0) ->
     {Wis,Taft,St6} = cg_recv_wait(Te, Tes, Le#l.i, Int1, St5),
     Int2 = sr_merge(Raft, Taft),		%Merge stack/registers
     Reg = load_vars(Rs, Int2#sr.reg),
-    {Sis ++ Ris ++ [{label,Tl}] ++ Wis ++ [{label,Bl}],
+    {Sis ++ [line(Le)] ++ Ris ++ [{label,Tl}] ++ Wis ++ [{label,Bl}],
      clear_dead(Int2#sr{reg=Reg}, Le#l.i, Vdb),
      St6#cg{break=St0#cg.break,recv=St0#cg.recv}}.
 
@@ -1463,12 +1492,13 @@ cg_binary([{bs_put_binary,Fail,{atom,all},U,_Flags,Src}|PutCode],
 		 {bs_append,Fail,Target,0,MaxRegs,U,Src,BinFlags,Target}
 	 end] ++ PutCode,
     cg_bin_opt(Code);
-cg_binary(PutCode, Target, Temp, Fail, MaxRegs, _Anno) ->
+cg_binary(PutCode, Target, Temp, Fail, MaxRegs, Anno) ->
+    Line = line(Anno),
     Live = cg_live(Target, MaxRegs),
     {InitOp,SzCode} = cg_binary_size(PutCode, Target, Temp, Fail, Live),
 
-    Code = SzCode ++ [{InitOp,Fail,Target,0,MaxRegs,
-		       {field_flags,[]},Target}|PutCode],
+    Code = [Line|SzCode] ++ [{InitOp,Fail,Target,0,MaxRegs,
+			      {field_flags,[]},Target}|PutCode],
     cg_bin_opt(Code).
 
 cg_live({x,X}, MaxRegs) when X =:= MaxRegs -> MaxRegs+1;
@@ -2052,6 +2082,38 @@ drop_catch(Tag, [Other|Stk]) -> [Other|drop_catch(Tag, Stk)].
 new_label(#cg{lcount=Next}=St) ->
     {Next,St#cg{lcount=Next+1}}.
 
+%% line(Le) -> {line,[] | {location,File,Line}}
+%%  Create a line instruction, containing information about
+%%  the current filename and line number. A line information
+%%  instruction should be placed before any operation that could
+%%  cause an exception.
+
+line(#l{a=Anno}) ->
+    line(Anno);
+line([Line,{file,Name}]) when is_integer(Line) ->
+    line_1(Name, Line);
+line([_|_]=A) ->
+    {Name,Line} = find_loc(A, no_file, 0),
+    line_1(Name, Line);
+line([]) ->
+    {line,[]}.
+
+line_1(no_file, _) ->
+    {line,[]};
+line_1(_, 0) ->
+    %% Missing line number or line number 0.
+    {line,[]};
+line_1(Name, Line) ->
+    {line,[{location,Name,abs(Line)}]}.
+
+find_loc([Line|T], File, _) when is_integer(Line) ->
+    find_loc(T, File, Line);
+find_loc([{file,File}|T], _, Line) ->
+    find_loc(T, File, Line);
+find_loc([_|T], File, Line) ->
+    find_loc(T, File, Line);
+find_loc([], File, Line) -> {File,Line}.
+
 flatmapfoldl(F, Accu0, [Hd|Tail]) ->
     {R,Accu1} = F(Hd, Accu0),
     {Rs,Accu2} = flatmapfoldl(F, Accu1, Tail),
diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl
index 87bb5bec25..6f3590b156 100644
--- a/lib/compiler/src/v3_core.erl
+++ b/lib/compiler/src/v3_core.erl
@@ -180,7 +180,7 @@ body(Cs0, Name, Arity, St0) ->
     {Args,St1} = new_vars(Anno, Arity, St0),
     {Cs1,St2} = clauses(Cs0, St1),
     {Ps,St3} = new_vars(Arity, St2),    %Need new variables here
-    Fc = function_clause(Ps, {Name,Arity}),
+    Fc = function_clause(Ps, Anno, {Name,Arity}),
     {#ifun{anno=#a{anno=Anno},id=[],vars=Args,clauses=Cs1,fc=Fc},St3}.
 
 %% clause(Clause, State) -> {Cclause,State} | noclause.
@@ -507,15 +507,15 @@ expr({block,_,Es0}, St0) ->
     {E1,Es1 ++ Eps,St2};
 expr({'if',L,Cs0}, St0) ->
     {Cs1,St1} = clauses(Cs0, St0),
-    Fc = fail_clause([], #c_literal{val=if_clause}),
     Lanno = lineno_anno(L, St1),
+    Fc = fail_clause([], Lanno, #c_literal{val=if_clause}),
     {#icase{anno=#a{anno=Lanno},args=[],clauses=Cs1,fc=Fc},[],St1};
 expr({'case',L,E0,Cs0}, St0) ->
     {E1,Eps,St1} = novars(E0, St0),
     {Cs1,St2} = clauses(Cs0, St1),
     {Fpat,St3} = new_var(St2),
-    Fc = fail_clause([Fpat], c_tuple([#c_literal{val=case_clause},Fpat])),
-    Lanno = lineno_anno(L, St3),
+    Lanno = lineno_anno(L, St2),
+    Fc = fail_clause([Fpat], Lanno, c_tuple([#c_literal{val=case_clause},Fpat])),
     {#icase{anno=#a{anno=Lanno},args=[E1],clauses=Cs1,fc=Fc},Eps,St3};
 expr({'receive',L,Cs0}, St0) ->
     {Cs1,St1} = clauses(Cs0, St0),
@@ -541,9 +541,10 @@ expr({'try',L,Es0,Cs0,Ecs,[]}, St0) ->
     {V,St2} = new_var(St1),		%This name should be arbitrary
     {Cs1,St3} = clauses(Cs0, St2),
     {Fpat,St4} = new_var(St3),
-    Fc = fail_clause([Fpat], c_tuple([#c_literal{val=try_clause},Fpat])),
+    Lanno = lineno_anno(L, St4),
+    Fc = fail_clause([Fpat], Lanno,
+		     c_tuple([#c_literal{val=try_clause},Fpat])),
     {Evs,Hs,St5} = try_exception(Ecs, St4),
-    Lanno = lineno_anno(L, St1),
     {#itry{anno=#a{anno=lineno_anno(L, St5)},args=Es1,
 	   vars=[V],body=[#icase{anno=#a{anno=Lanno},args=[V],clauses=Cs1,fc=Fc}],
 	   evars=Evs,handler=Hs},
@@ -607,8 +608,8 @@ expr({match,L,P0,E0}, St0) ->
 		 Thrown
 	 end,
     {Fpat,St4} = new_var(St3),
-    Fc = fail_clause([Fpat], c_tuple([#c_literal{val=badmatch},Fpat])),
     Lanno = lineno_anno(L, St4),
+    Fc = fail_clause([Fpat], Lanno, c_tuple([#c_literal{val=badmatch},Fpat])),
     case P2 of
 	nomatch ->
 	    St = add_warning(L, nomatch, St4),
@@ -828,8 +829,9 @@ fun_tq({_,_,Name}=Id, Cs0, L, St0) ->
     {Cs1,St1} = clauses(Cs0, St0),
     {Args,St2} = new_vars(Arity, St1),
     {Ps,St3} = new_vars(Arity, St2),		%Need new variables here
-    Fc = function_clause(Ps, {Name,Arity}),
-    Fun = #ifun{anno=#a{anno=lineno_anno(L, St3)},
+    Anno = lineno_anno(L, St3),
+    Fc = function_clause(Ps, Anno, {Name,Arity}),
+    Fun = #ifun{anno=#a{anno=Anno},
 		id=[{id,Id}],				%We KNOW!
 		vars=Args,clauses=Cs1,fc=Fc},
     {Fun,[],St3}.
@@ -929,7 +931,7 @@ lc_tq(Line, E, [{b_generate,Lg,P,G}|Qs0], Mc, St0) ->
      [],St};
 lc_tq(Line, E, [Fil0|Qs0], Mc, St0) ->
     %% Special case sequences guard tests.
-    LA = lineno_anno(Line, St0),
+    LA = lineno_anno(element(2, Fil0), St0),
     LAnno = #a{anno=LA},
     case is_guard_test(Fil0) of
 	true ->
@@ -945,7 +947,8 @@ lc_tq(Line, E, [Fil0|Qs0], Mc, St0) ->
 	false ->
 	    {Lc,Lps,St1} = lc_tq(Line, E, Qs0, Mc, St0),
 	    {Fpat,St2} = new_var(St1),
-	    Fc = fail_clause([Fpat], c_tuple([#c_literal{val=case_clause},Fpat])),
+	    Fc = fail_clause([Fpat], LA,
+			     c_tuple([#c_literal{val=case_clause},Fpat])),
 	    %% Do a novars little optimisation here.
 	    {Filc,Fps,St3} = novars(Fil0, St2),
 	    {#icase{anno=LAnno,
@@ -1072,7 +1075,7 @@ bc_tq1(Line, E, [{b_generate,Lg,P,G}|Qs0], AccExpr, St0) ->
      [],St};
 bc_tq1(Line, E, [Fil0|Qs0], AccVar, St0) ->
     %% Special case sequences guard tests.
-    LA = lineno_anno(Line, St0),
+    LA = lineno_anno(element(2, Fil0), St0),
     LAnno = #a{anno=LA},
     case is_guard_test(Fil0) of
 	true ->
@@ -1089,7 +1092,8 @@ bc_tq1(Line, E, [Fil0|Qs0], AccVar, St0) ->
 	false ->
 	    {Bc,Bps,St1} = bc_tq1(Line, E, Qs0, AccVar, St0),
 	    {Fpat,St2} = new_var(St1),
-	    Fc = fail_clause([Fpat], c_tuple([#c_literal{val=case_clause},Fpat])),
+	    Fc = fail_clause([Fpat], LA,
+			     c_tuple([#c_literal{val=case_clause},Fpat])),
 	    %% Do a novars little optimisation here.
 	    {Filc,Fps,St} = novars(Fil0, St2),
 	    {#icase{anno=LAnno,
@@ -1562,17 +1566,11 @@ new_vars_1(N, Anno, St0, Vs) when N > 0 ->
     new_vars_1(N-1, Anno, St1, [V|Vs]);
 new_vars_1(0, _, St, Vs) -> {Vs,St}.
 
-function_clause(Ps, Name) ->
-    function_clause(Ps, [], Name).
-
 function_clause(Ps, LineAnno, Name) ->
-    FcAnno = [{function_name,Name}],
+    FcAnno = [{function_name,Name}|LineAnno],
     fail_clause(Ps, FcAnno,
 		ann_c_tuple(LineAnno, [#c_literal{val=function_clause}|Ps])).
 
-fail_clause(Pats, Arg) ->
-    fail_clause(Pats, [], Arg).
-
 fail_clause(Pats, Anno, Arg) ->
     #iclause{anno=#a{anno=[compiler_generated]},
 	     pats=Pats,guard=[],
diff --git a/lib/compiler/src/v3_kernel.erl b/lib/compiler/src/v3_kernel.erl
index 3b33a08cf7..4e06b464a4 100644
--- a/lib/compiler/src/v3_kernel.erl
+++ b/lib/compiler/src/v3_kernel.erl
@@ -247,7 +247,7 @@ expr(#c_var{anno=A,name={_Name,Arity}}=Fname, Sub, St) ->
     %% instead of one for each occurrence as done now.
     Vs = [#c_var{name=list_to_atom("V" ++ integer_to_list(V))} ||
 	     V <- integers(1, Arity)],
-    Fun = #c_fun{anno=A,vars=Vs,body=#c_apply{op=Fname,args=Vs}},
+    Fun = #c_fun{anno=A,vars=Vs,body=#c_apply{anno=A,op=Fname,args=Vs}},
     expr(Fun, Sub, St);
 expr(#c_var{anno=A,name=V}, Sub, St) ->
     {#k_var{anno=A,name=get_vsub(V, Sub)},[],St};
@@ -291,7 +291,7 @@ expr(#c_binary{anno=A,segments=Cv}, Sub, St0) ->
 	    Erl = #c_literal{val=erlang},
 	    Name = #c_literal{val=error},
 	    Args = [#c_literal{val=badarg}],
-	    Error = #c_call{module=Erl,name=Name,args=Args},
+	    Error = #c_call{anno=A,module=Erl,name=Name,args=Args},
 	    expr(Error, Sub, St0)
     end;
 expr(#c_fun{anno=A,vars=Cvs,body=Cb}, Sub0, #kern{ff=OldFF,func=Func}=St0) ->
@@ -1167,9 +1167,7 @@ select_bin_int_1(_, _, _, _) -> throw(not_possible).
 
 select_assert_match_possible(Sz, Val, Fs) ->
     EmptyBindings = erl_eval:new_bindings(),
-    MatchFun = fun({integer,_,_}, NewV, Bs) when NewV =:= Val ->
-		       {match,Bs}
-	       end,
+    MatchFun = match_fun(Val),
     EvalFun = fun({integer,_,S}, B) -> {value,S,B} end,
     Expr = [{bin_element,0,{integer,0,Val},{integer,0,Sz},[{unit,1}|Fs]}],
     {value,Bin,EmptyBindings} = eval_bits:expr_grp(Expr, EmptyBindings, EvalFun),
@@ -1184,6 +1182,11 @@ select_assert_match_possible(Sz, Val, Fs) ->
 	    throw(not_possible)
     end.
 
+match_fun(Val) ->
+    fun(match, {{integer,_,_},NewV,Bs}) when NewV =:= Val ->
+	    {match,Bs}
+    end.
+
 select_utf8(Val0) ->
     try
 	Bin = <<Val0/utf8>>,
diff --git a/lib/compiler/src/v3_life.erl b/lib/compiler/src/v3_life.erl
index a7a4d4dc91..a1d92af9f8 100644
--- a/lib/compiler/src/v3_life.erl
+++ b/lib/compiler/src/v3_life.erl
@@ -65,7 +65,7 @@ functions([], Acc) -> reverse(Acc).
 
 %% function(Kfunc) -> Func.
 
-function(#k_fdef{func=F,arity=Ar,vars=Vs,body=Kb}) ->
+function(#k_fdef{anno=#k{a=Anno},func=F,arity=Ar,vars=Vs,body=Kb}) ->
     try
 	As = var_list(Vs),
 	Vdb0 = foldl(fun ({var,N}, Vdb) -> new_var(N, 0, Vdb) end, [], As),
@@ -80,7 +80,7 @@ function(#k_fdef{func=F,arity=Ar,vars=Vs,body=Kb}) ->
 	put(guard_refc, 0),
 	{B1,_,Vdb1} = body(B0, 1, Vdb0),
 	erase(guard_refc),
-	{function,F,Ar,As,B1,Vdb1}
+	{function,F,Ar,As,B1,Vdb1,Anno}
     catch
 	Class:Error ->
 	    Stack = erlang:get_stacktrace(),
diff --git a/lib/compiler/test/bs_match_SUITE.erl b/lib/compiler/test/bs_match_SUITE.erl
index 6a795f6634..f8c71a0257 100644
--- a/lib/compiler/test/bs_match_SUITE.erl
+++ b/lib/compiler/test/bs_match_SUITE.erl
@@ -1028,8 +1028,8 @@ haystack_2(Haystack) ->
 fc({'EXIT',{function_clause,_}}) -> ok;
 fc({'EXIT',{{case_clause,_},_}}) when ?MODULE =:= bs_match_inline_SUITE -> ok.
 
-fc(Name, Args, {'EXIT',{function_clause,[{?MODULE,Name,Args}|_]}}) -> ok;
-fc(Name, Args, {'EXIT',{function_clause,[{?MODULE,Name,Arity}|_]}})
+fc(Name, Args, {'EXIT',{function_clause,[{?MODULE,Name,Args,_}|_]}}) -> ok;
+fc(Name, Args, {'EXIT',{function_clause,[{?MODULE,Name,Arity,_}|_]}})
   when length(Args) =:= Arity ->
     true = test_server:is_native(?MODULE);
 fc(_, Args, {'EXIT',{{case_clause,ActualArgs},_}})
diff --git a/lib/compiler/test/compile_SUITE.erl b/lib/compiler/test/compile_SUITE.erl
index b3e5376ffd..8c6a623dfb 100644
--- a/lib/compiler/test/compile_SUITE.erl
+++ b/lib/compiler/test/compile_SUITE.erl
@@ -82,6 +82,7 @@ file_1(Config) when is_list(Config) ->
     ?line {ok,simple} = compile:file(Simple, [native,report]), %Smoke test.
     ?line {ok,simple} = compile:file(Target, [native,from_beam]), %Smoke test.
     ?line {ok,simple} = compile:file(Simple, [debug_info]),
+    ?line {ok,simple} = compile:file(Simple, [no_line_info]), %Coverage
     ?line ok = file:set_cwd(Cwd),
     ?line true = exists(Target),
     ?line passed = run(Target, test, []),
diff --git a/lib/compiler/test/guard_SUITE.erl b/lib/compiler/test/guard_SUITE.erl
index 0e69efba6b..40711783ed 100644
--- a/lib/compiler/test/guard_SUITE.erl
+++ b/lib/compiler/test/guard_SUITE.erl
@@ -32,7 +32,8 @@
 	 t_is_boolean/1,is_function_2/1,
 	 tricky/1,rel_ops/1,literal_type_tests/1,
 	 basic_andalso_orelse/1,traverse_dcd/1,
-	 check_qlc_hrl/1,andalso_semi/1,t_tuple_size/1,binary_part/1]).
+	 check_qlc_hrl/1,andalso_semi/1,t_tuple_size/1,binary_part/1,
+	 bad_constants/1]).
 
 suite() -> [{ct_hooks,[ts_install_cth]}].
 
@@ -44,7 +45,8 @@ all() ->
      more_xor_guards, build_in_guard, old_guard_tests, gbif,
      t_is_boolean, is_function_2, tricky, rel_ops,
      literal_type_tests, basic_andalso_orelse, traverse_dcd,
-     check_qlc_hrl, andalso_semi, t_tuple_size, binary_part].
+     check_qlc_hrl, andalso_semi, t_tuple_size, binary_part,
+     bad_constants].
 
 groups() -> 
     [].
@@ -1517,8 +1519,27 @@ bptest(B,A,C)  when erlang:binary_part(B,{A,C}) =:= <<3,3>> ->
 bptest(_,_,_) ->
     error.
 
-
-
+-define(FAILING(C),
+	if
+	    C -> ?t:fail(should_fail);
+	    true -> ok
+	end,
+	if
+	    true, C -> ?t:fail(should_fail);
+	    true -> ok
+	end).
+
+bad_constants(Config) when is_list(Config) ->
+    ?line ?FAILING(false),
+    ?line ?FAILING([]),
+    ?line ?FAILING([a]),
+    ?line ?FAILING([Config]),
+    ?line ?FAILING({a,b}),
+    ?line ?FAILING({a,Config}),
+    ?line ?FAILING(<<1>>),
+    ?line ?FAILING(42),
+    ?line ?FAILING(3.14),
+    ok.
 
 %% Call this function to turn off constant propagation.
 id(I) -> I.
diff --git a/lib/compiler/test/inline_SUITE.erl b/lib/compiler/test/inline_SUITE.erl
index af2b8ec92a..086fba2649 100644
--- a/lib/compiler/test/inline_SUITE.erl
+++ b/lib/compiler/test/inline_SUITE.erl
@@ -263,7 +263,8 @@ my_apply(M, F, A, Init) ->
 
 really_inlined(Config) when is_list(Config) ->
     %% Make sure that badarg/2 really gets inlined.
-    {'EXIT',{badarg,[{?MODULE,fail_me_now,[]}|_]}} = (catch fail_me_now()),
+    {'EXIT',{badarg,[{?MODULE,fail_me_now,[],_}|_]}} =
+	(catch fail_me_now()),
     ok.
 
 fail_me_now() ->
diff --git a/lib/compiler/test/lc_SUITE.erl b/lib/compiler/test/lc_SUITE.erl
index c8908858ba..f5948504b3 100644
--- a/lib/compiler/test/lc_SUITE.erl
+++ b/lib/compiler/test/lc_SUITE.erl
@@ -179,8 +179,8 @@ empty_generator(Config) when is_list(Config) ->
 
 id(I) -> I.
     
-fc(Args, {'EXIT',{function_clause,[{?MODULE,_,Args}|_]}}) -> ok;
-fc(Args, {'EXIT',{function_clause,[{?MODULE,_,Arity}|_]}})
+fc(Args, {'EXIT',{function_clause,[{?MODULE,_,Args,_}|_]}}) -> ok;
+fc(Args, {'EXIT',{function_clause,[{?MODULE,_,Arity,_}|_]}})
   when length(Args) =:= Arity ->
     true = test_server:is_native(?MODULE);
 fc(Args, {'EXIT',{{case_clause,ActualArgs},_}})
diff --git a/lib/compiler/test/misc_SUITE.erl b/lib/compiler/test/misc_SUITE.erl
index c941a80e61..9b414cade6 100644
--- a/lib/compiler/test/misc_SUITE.erl
+++ b/lib/compiler/test/misc_SUITE.erl
@@ -179,7 +179,7 @@ silly_coverage(Config) when is_list(Config) ->
     ?line expect_error(fun() -> v3_life:module(BadKernel, []) end),
 
     %% v3_codegen
-    CodegenInput = {?MODULE,[{foo,0}],[],[{function,foo,0,[a|b],a,b}]},
+    CodegenInput = {?MODULE,[{foo,0}],[],[{function,foo,0,[a|b],a,b,[]}]},
     ?line expect_error(fun() -> v3_codegen:module(CodegenInput, []) end),
 
     %% beam_block
@@ -187,7 +187,7 @@ silly_coverage(Config) when is_list(Config) ->
 		  [{function,foo,0,2,
 		    [{label,1},
 		     {func_info,{atom,?MODULE},{atom,foo},0},
-		     {label,2}|non_proper_list],99}]},
+		     {label,2}|non_proper_list]}],99},
     ?line expect_error(fun() -> beam_block:module(BlockInput, []) end),
 
     %% beam_bool
diff --git a/lib/compiler/test/trycatch_SUITE.erl b/lib/compiler/test/trycatch_SUITE.erl
index c6e0f8d85d..760cf17225 100644
--- a/lib/compiler/test/trycatch_SUITE.erl
+++ b/lib/compiler/test/trycatch_SUITE.erl
@@ -314,19 +314,19 @@ eclectic(Conf) when is_list(Conf) ->
     V = {make_ref(),3.1415926535,[[]|{}]},
     ?line {{value,{value,V},V},V} = 
 	eclectic_1({foo,{value,{value,V}}}, undefined, {value,V}),
-    ?line {{'EXIT',{V,[{?MODULE,foo,1}|_]}},V} = 
+    ?line {{'EXIT',{V,[{?MODULE,foo,1,_}|_]}},V} =
 	eclectic_1({catch_foo,{error,V}}, undefined, {value,V}),
     ?line {{error,{exit,V},{'EXIT',V}},V} =
 	eclectic_1({foo,{error,{exit,V}}}, error, {value,V}),
     ?line {{value,{value,V},V},
-	   {'EXIT',{badarith,[{?MODULE,my_add,2}|_]}}} =
+	   {'EXIT',{badarith,[{?MODULE,my_add,2,_}|_]}}} =
 	eclectic_1({foo,{value,{value,V}}}, undefined, {'add',{0,a}}),
     ?line {{'EXIT',V},V} =
 	eclectic_1({catch_foo,{exit,V}}, undefined, {throw,V}),
-    ?line {{error,{'div',{1,0}},{'EXIT',{badarith,[{?MODULE,my_div,2}|_]}}},
+    ?line {{error,{'div',{1,0}},{'EXIT',{badarith,[{?MODULE,my_div,2,_}|_]}}},
 	   {'EXIT',V}} =
 	eclectic_1({foo,{error,{'div',{1,0}}}}, error, {exit,V}),
-    ?line {{{error,V},{'EXIT',{V,[{?MODULE,foo,1}|_]}}},
+    ?line {{{error,V},{'EXIT',{V,[{?MODULE,foo,1,_}|_]}}},
 	   {'EXIT',V}} =
 	eclectic_1({catch_foo,{throw,{error,V}}}, undefined, {exit,V}),
     %%
@@ -336,15 +336,15 @@ eclectic(Conf) when is_list(Conf) ->
 	eclectic_2({throw,{value,V}}, throw, {value,V}),
     ?line {{caught,{'EXIT',V}},undefined} =
 	eclectic_2({value,{value,V}}, undefined, {exit,V}),
-    ?line {{caught,{'EXIT',{V,[{?MODULE,foo,1}|_]}}},undefined} =
+    ?line {{caught,{'EXIT',{V,[{?MODULE,foo,1,_}|_]}}},undefined} =
 	eclectic_2({error,{value,V}}, throw, {error,V}),
-    ?line {{caught,{'EXIT',{badarg,[{erlang,abs,[V]}|_]}}},V} =
+    ?line {{caught,{'EXIT',{badarg,[{erlang,abs,[V],_}|_]}}},V} =
 	eclectic_2({value,{'abs',V}}, undefined, {value,V}),
-    ?line {{caught,{'EXIT',{badarith,[{?MODULE,my_add,2}|_]}}},V} =
+    ?line {{caught,{'EXIT',{badarith,[{?MODULE,my_add,2,_}|_]}}},V} =
 	eclectic_2({exit,{'add',{0,a}}}, exit, {value,V}),
     ?line {{caught,{'EXIT',V}},undefined} =
 	eclectic_2({value,{error,V}}, undefined, {exit,V}),
-    ?line {{caught,{'EXIT',{V,[{?MODULE,foo,1}|_]}}},undefined} =
+    ?line {{caught,{'EXIT',{V,[{?MODULE,foo,1,_}|_]}}},undefined} =
 	eclectic_2({throw,{'div',{1,0}}}, throw, {error,V}),
     ok.
 
diff --git a/lib/debugger/doc/src/debugger_chapter.xml b/lib/debugger/doc/src/debugger_chapter.xml
index 1f5d4dd5ff..2d812b0236 100644
--- a/lib/debugger/doc/src/debugger_chapter.xml
+++ b/lib/debugger/doc/src/debugger_chapter.xml
@@ -254,19 +254,17 @@ c_break(Bindings) ->
       used, for example, if an error occurs:</p>
     <pre>
 1> <input>catch a+1.</input>
-{'EXIT',{badarith,[{erlang,'+',[a,1]},
-                   {erl_eval,do_apply,5},
-                   {erl_eval,expr,5},
-                   {shell,exprs,6},
-                   {shell,eval_exprs,6},
-                   {shell,eval_loop,3}]}}</pre>
-
-    <p>In the case above, the stack trace shows that the function called
-      last was <c>erl_eval:eval_op/3</c>. See <em>Erlang Reference
-	Manual, Errors and Error handling</em>, for more information
-      about stack trace.</p>
-
-    <p>Debugger emulates the stack trace by keeping track of recently
+{'EXIT',{badarith,[{erlang,'+',[a,1],[]},
+                   {erl_eval,do_apply,5,[{file,"erl_eval.erl"},{line,562}]},
+                   {erl_eval,expr,5,[{file,"erl_eval.erl"},{line,359}]},
+                   {shell,exprs,7,[{file,"shell.erl"},{line,668}]},
+                   {shell,eval_exprs,7,[{file,"shell.erl"},{line,623}]},
+                   {shell,eval_loop,3,[{file,"shell.erl"},{line,608}]}]}}</pre>
+
+    <p>See the <em>Erlang Reference Manual, Errors and Error handling</em>,
+      for more information about the stack trace.</p>
+
+    <p>The Debugger emulates the stack trace by keeping track of recently
       called interpreted functions. (The real stack trace cannot be
       used, as it shows which functions of the Debugger have been
       called, rather than which interpreted functions).</p>
@@ -276,17 +274,15 @@ c_break(Bindings) ->
       <seealso marker="#attach">the Attach Process window</seealso>.
     </p>
 
-    <p>By default, the Debugger saves information about all current
+    <p>By default, the Debugger only saves information about recursive
       function calls, that is, function calls that have not yet returned
-      a value (option 'Stack On, Tail').</p>
-
-    <p>This means, however, that information is saved also for tail
-      recursive calls. For example, repeated calls to the <c>loop</c>
-      function of an Erlang process. This may consume unnecessary
-      amounts of memory for debugged processes with long lifetimes and
-      many tail recursive calls. It is therefore possible to set
-      the option 'Stack On, no tail', in which case information about
-      previous calls are discarded when a tail recursive call is made.
+      a value (option 'Stack On, No Tail').</p>
+
+    <p>Sometimes, however, it can be useful to save all calls, even
+      tail-recursive calls. That can be done with the 'Stack On, Tail'
+      option. Note that this option will consume more memory and slow
+      down execution of interpreted functions when there are many
+      tail-recursive calls.
     </p>
 
     <p>It is also possible to turn off the Debugger stack trace
diff --git a/lib/debugger/doc/src/int.xml b/lib/debugger/doc/src/int.xml
index 8b55461a44..c9d815755d 100644
--- a/lib/debugger/doc/src/int.xml
+++ b/lib/debugger/doc/src/int.xml
@@ -284,12 +284,12 @@ spawn(Module, Name, [Pid | Args])
 	<list>
 	  <item><c>all</c> - save information about all current calls,
 	    that is, function calls that have not yet returned a value.
-	    This is the default.</item>
+	    </item>
 	  <item><c>no_tail</c> - save information about current calls,
 	    but discard previous information when a tail recursive call
 	    is made. This option consumes less memory and may be
 	    necessary to use for processes with long lifetimes and many
-	    tail recursive calls.</item>
+	    tail recursive calls. This is the default.</item>
 	  <item><c>false</c> - do not save any information about current
 	    calls.</item>
 	</list>
diff --git a/lib/debugger/src/Makefile b/lib/debugger/src/Makefile
index 8551fe887d..6dc7d0d783 100644
--- a/lib/debugger/src/Makefile
+++ b/lib/debugger/src/Makefile
@@ -44,6 +44,7 @@ MODULES= \
 	dbg_ieval \
 	dbg_iload \
 	dbg_iserver \
+	dbg_istk \
 	dbg_ui_break \
 	dbg_ui_break_win \
 	dbg_ui_edit \
diff --git a/lib/debugger/src/dbg_debugged.erl b/lib/debugger/src/dbg_debugged.erl
index 3732c40c73..18dcd92ff3 100644
--- a/lib/debugger/src/dbg_debugged.erl
+++ b/lib/debugger/src/dbg_debugged.erl
@@ -76,8 +76,8 @@ msg_loop(Meta, Mref, SaveStacktrace) ->
 	    msg_loop(Meta, Mref, SaveStacktrace);
 
 	%% Meta needs something evaluated within context of real process
-	{sys, Meta, {command, Command, Stacktrace}} ->
-	    Reply = handle_command(Command, Stacktrace),
+	{sys, Meta, {command,Command}} ->
+	    Reply = handle_command(Command),
 	    Meta ! {sys, self(), Reply},
 	    msg_loop(Meta, Mref, SaveStacktrace);
 
@@ -93,11 +93,12 @@ msg_loop(Meta, Mref, SaveStacktrace) ->
 	    end
     end.
 
-handle_command(Command, Stacktrace) ->
-    try reply(Command)
+handle_command(Command) ->
+    try
+	reply(Command)
     catch Class:Reason ->
-	    Stacktrace2 = stacktrace_f(erlang:get_stacktrace()),
-	    {exception, {Class,Reason,Stacktrace2++Stacktrace}}
+	    Stacktrace = stacktrace_f(erlang:get_stacktrace()),
+	    {exception,{Class,Reason,Stacktrace}}
     end.
 
 reply({apply,M,F,As}) ->
@@ -116,5 +117,5 @@ demonitor(Mref) ->
 %% Fix stacktrace - keep all above call to this module.
 %%
 stacktrace_f([]) -> [];
-stacktrace_f([{?MODULE,_,_}|_]) -> [];
+stacktrace_f([{?MODULE,_,_,_}|_]) -> [];
 stacktrace_f([F|S]) -> [F|stacktrace_f(S)].
diff --git a/lib/debugger/src/dbg_icmd.erl b/lib/debugger/src/dbg_icmd.erl
index e9502eaa2b..b230efaa7a 100644
--- a/lib/debugger/src/dbg_icmd.erl
+++ b/lib/debugger/src/dbg_icmd.erl
@@ -273,7 +273,7 @@ handle_int_msg({old_code,Mod}, Status, Bs,
 	    erase([Mod|db]),
 	    put(cache, []);
 	true ->
-	    case dbg_ieval:in_use_p(Mod, M) of
+	    case dbg_istk:in_use_p(Mod, M) of
 		true ->
 		    %% A call to Mod is on the stack (or might be),
 		    %% so we must terminate.
@@ -342,11 +342,11 @@ handle_user_msg({set,stack_trace,Flag}, _Status, _Bs, _Ieval) ->
 handle_user_msg({get,bindings,From,SP}, _Status, Bs, _Ieval) ->
     reply(From, bindings, bindings(Bs, SP));
 handle_user_msg({get,stack_frame,From,{Dir,SP}}, _Status, _Bs,_Ieval) ->
-    reply(From, stack_frame, dbg_ieval:stack_frame(Dir, SP));
+    reply(From, stack_frame, dbg_istk:stack_frame(Dir, SP));
 handle_user_msg({get,messages,From,_}, _Status, _Bs, _Ieval) ->
     reply(From, messages, messages());
-handle_user_msg({get,backtrace,From,N}, _Status, _Bs, _Ieval) ->
-    reply(From, backtrace, dbg_ieval:backtrace(N)).
+handle_user_msg({get,backtrace,From,N}, _Status, _Bs, Ieval) ->
+    reply(From, backtrace, dbg_istk:backtrace(N, Ieval)).
 
 set_stack_trace(true) ->
     set_stack_trace(all);
@@ -366,11 +366,11 @@ reply(From, Tag, Reply) ->
 bindings(Bs, nostack) ->
     Bs;
 bindings(Bs, SP) ->
-    case dbg_ieval:stack_level() of
+    case dbg_istk:stack_level() of
 	Le when SP > Le ->
 	    Bs;
 	_ ->
-	    dbg_ieval:bindings(SP)
+	    dbg_istk:bindings(SP)
     end.
 
 messages() ->
@@ -422,7 +422,7 @@ eval_nonrestricted({From, _Mod, Cmd, _SP}, Bs,
 
 eval_nonrestricted_1({match,_,{var,_,Var},Expr}, Bs, Ieval) ->
     {value,Res,Bs2} = 
-	dbg_ieval:eval_expr(Expr, Bs, Ieval#ieval{last_call=false}),
+	dbg_ieval:eval_expr(Expr, Bs, Ieval#ieval{top=false}),
     Bs3 = case lists:keyfind(Var, 1, Bs) of
 	      {Var,_Value} ->
 		  lists:keyreplace(Var, 1, Bs2, {Var,Res});
@@ -437,7 +437,7 @@ eval_nonrestricted_1({var,_,Var}, Bs, _Ieval) ->
     {Res,Bs};
 eval_nonrestricted_1(Expr, Bs, Ieval) ->
     {value,Res,Bs2} = 
-	dbg_ieval:eval_expr(Expr, Bs, Ieval#ieval{last_call=false}),
+	dbg_ieval:eval_expr(Expr, Bs, Ieval#ieval{top=false}),
     {Res,Bs2}.
 
 mark_running(LineNo, Le) ->
diff --git a/lib/debugger/src/dbg_ieval.erl b/lib/debugger/src/dbg_ieval.erl
index 306323f8ea..df725ed9e5 100644
--- a/lib/debugger/src/dbg_ieval.erl
+++ b/lib/debugger/src/dbg_ieval.erl
@@ -20,8 +20,7 @@
 
 -export([eval/3,exit_info/5]).
 -export([eval_expr/3]).
--export([check_exit_msg/3,exception/4,in_use_p/2]).
--export([stack_level/0, bindings/1, stack_frame/2, backtrace/1]).
+-export([check_exit_msg/3,exception/4]).
 
 -include("dbg_ieval.hrl").
 
@@ -71,13 +70,12 @@ exit_info(Int, AttPid, OrigPid, Reason, ExitInfo) ->
     
     case ExitInfo of
 	{{Mod,Line},Bs,S} ->
-	    Stack = binary_to_term(S),
-	    put(stack, Stack),
-	    Le = stack_level(Stack),
+	    dbg_istk:from_external(S),
+	    Le = dbg_istk:stack_level(),
 	    dbg_icmd:tell_attached({exit_at, {Mod, Line}, Reason, Le}),
 	    exit_loop(OrigPid, Reason, Bs,#ieval{module=Mod,line=Line});
 	{} ->
-	    put(stack, []),
+	    dbg_istk:init(),
 	    dbg_icmd:tell_attached({exit_at, null, Reason, 1}),
 	    exit_loop(OrigPid, Reason, erl_eval:new_bindings(),#ieval{})
     end.
@@ -142,12 +140,12 @@ check_exit_msg({'DOWN',_,_,_,Reason}, Bs,
 	    undefined when Le =:= 1 -> % died outside interpreted code
 		{};
 	    undefined when Le > 1 ->
-		StackBin = term_to_binary(get(stack)),
-		{{Mod, Li}, Bs, StackBin};
+		StackExternal = (dbg_istk:delayed_to_external())(),
+		{{Mod, Li}, Bs, StackExternal};
 
 	    %% Debugged has terminated due to an exception
-	    ExitInfo0 ->
-		ExitInfo0
+	    ExitInfo0 when is_function(ExitInfo0, 0) ->
+		ExitInfo0()
 	end,
     dbg_iserver:cast(get(int), {set_exit_info,self(),ExitInfo}),
 
@@ -170,30 +168,26 @@ check_exit_msg(_Msg, _Bs, _Ieval) ->
 %% and then raise the exception.
 %%--------------------------------------------------------------------
 exception(Class, Reason, Bs, Ieval) ->
-    exception(Class, Reason, fix_stacktrace(1), Bs, Ieval).
-
-exception(Class, Reason, Stacktrace, Bs, #ieval{module=M, line=Line}) ->
-    ExitInfo = {{M,Line}, Bs, term_to_binary(get(stack))},
+    exception(Class, Reason, Bs, Ieval, false).
+
+exception(Class, Reason, Bs, Ieval, false) ->
+    do_exception(Class, Reason,
+		 dbg_istk:delayed_stacktrace(no_args, Ieval),
+		 Bs, Ieval);
+exception(Class, Reason, Bs, Ieval, true) ->
+    do_exception(Class, Reason,
+		 dbg_istk:delayed_stacktrace(include_args, Ieval),
+		 Bs, Ieval).
+
+do_exception(Class, Reason, Stacktrace, Bs, #ieval{module=M, line=Line}) ->
+    StackFun = dbg_istk:delayed_to_external(),
+    ExitInfo = fun() ->
+		       {{M,Line},Bs,StackFun()}
+	       end,
     put(exit_info, ExitInfo),
     put(stacktrace, Stacktrace),
     erlang:Class(Reason).
 
-%%--------------------------------------------------------------------
-%% in_use_p(Mod, Cm) -> boolean()
-%%   Mod = Cm = atom()
-%% Returns true if Mod is found on the stack, otherwise false.
-%%--------------------------------------------------------------------
-in_use_p(Mod, Mod) -> true;
-in_use_p(Mod, _Cm) ->
-    case get(trace_stack) of
-	false -> true;
-	_ -> %  all | no_tail
-	    lists:any(fun({_,{M,_,_,_}}) when M =:= Mod -> true;
-			 (_) -> false
-		      end,
-		      get(stack))
-    end.
-
 %%====================================================================
 %% Internal functions
 %%====================================================================
@@ -225,7 +219,7 @@ meta(Int, Debugged, M, F, As) ->
     put(cache, []),
     put(next_break, Status), % break | running (other values later)
     put(self, Debugged),     % pid() interpreted process
-    put(stack, []),
+    dbg_istk:init(),
     put(stacktrace, []),
     put(trace_stack, dbg_iserver:call(Int, get_stack_trace)),
     put(trace, false),       % bool() Trace on/off
@@ -243,8 +237,7 @@ meta(Int, Debugged, M, F, As) ->
 
 debugged_cmd(Cmd, Bs, Ieval) ->
     Debugged = get(self),
-    Stacktrace = fix_stacktrace(2),
-    Debugged ! {sys, self(), {command,Cmd,Stacktrace}},
+    Debugged ! {sys, self(), {command,Cmd}},
     meta_loop(Debugged, Bs, Ieval).
 
 meta_loop(Debugged, Bs, #ieval{level=Le} = Ieval) ->
@@ -257,12 +250,17 @@ meta_loop(Debugged, Bs, #ieval{level=Le} = Ieval) ->
 	    {value, Val, Bs};
 	{sys, Debugged, {value,Val,Bs2}} ->
 	    {value, Val, Bs2};
-	{sys, Debugged, {exception,{Class,Reason,Stacktrace}}} ->
+	{sys, Debugged, {exception,{Class,Reason,Stk}}} ->
 	    case get(exit_info) of
 
-		%% Error occured outside interpreted code
+		%% Error occurred outside of interpreted code.
 		undefined ->
-		    exception(Class,Reason,Stacktrace,Bs,Ieval);
+		    MakeStk0 = dbg_istk:delayed_stacktrace(),
+		    MakeStk = fun(Depth0) ->
+				      Depth = max(0, Depth0 - length(Stk)),
+				      Stk ++ MakeStk0(Depth)
+			      end,
+		    do_exception(Class, Reason, MakeStk, Bs, Ieval);
 
 		%% Error must have occured within a re-entry to
 		%% interpreted code, simply raise the exception
@@ -275,7 +273,7 @@ meta_loop(Debugged, Bs, #ieval{level=Le} = Ieval) ->
 	    %% Reset process dictionary
 	    %% This is really only necessary if the process left
 	    %% interpreted code at a call level > 1
-	    put(stack, []),
+	    dbg_istk:init(),
 	    put(stacktrace, []),
 	    put(exit_info, undefined),
 	    
@@ -313,177 +311,6 @@ exit_loop(OrigPid, Reason, Bs, Ieval) ->
 	    exit_loop(OrigPid, Reason, Bs, Ieval)
     end.
 
-%%--Stack emulation---------------------------------------------------
-
-%% We keep track of a call stack that is used for
-%%  1) saving stack frames that can be inspected from an Attached
-%%     Process GUI (using dbg_icmd:get(Meta, stack_frame, {Dir, SP})
-%%  2) generate an approximation of regular stacktrace -- sent to
-%%     Debugged when it should raise an exception or evaluate a
-%%     function (since it might possible raise an exception)
-%%
-%% Stack = [Entry]
-%%   Entry = {Le, {MFA, Where, Bs}}
-%%     Le = int()         % current call level
-%%     MFA = {M,F,Args}   % called function (or fun)
-%%         | {Fun,Args}   %
-%%     Where = {M,Li}     % from where (module+line) function is called
-%%     Bs = bindings()    % current variable bindings
-%%
-%% How to push depends on the "Stack Trace" option (value saved in
-%% process dictionary item 'trace_stack').
-%%   all - everything is pushed
-%%   no_tail - tail recursive push
-%%   false - nothing is pushed
-%% Whenever a function returns, the corresponding call frame is popped.
-
-push(MFA, Bs, #ieval{level=Le,module=Cm,line=Li,last_call=Lc}) ->
-    Entry = {Le, {MFA, {Cm,Li}, Bs}},
-    case get(trace_stack) of
-	false -> ignore;
-	no_tail when Lc ->
-	    case get(stack) of
-		[] -> put(stack, [Entry]);
-		[_Entry|Entries] -> put(stack, [Entry|Entries])
-	    end;
-	_ -> % all | no_tail when Lc =:= false
-	    put(stack, [Entry|get(stack)])
-    end.
-
-pop() ->
-    case get(trace_stack) of
-	false -> ignore;
-	_ -> % all � no_tail
-	    case get(stack) of
-		[_Entry|Entries] ->
-		    put(stack, Entries);
-		[] ->
-		    ignore
-	    end
-    end.
-
-pop(Le) ->
-    case get(trace_stack) of
-	false -> ignore;
-	_ -> % all | no_tail
-	    put(stack, pop(Le, get(stack)))
-    end.
-
-pop(Level, [{Le, _}|Stack]) when Level=<Le ->
-    pop(Level, Stack);
-pop(_Level, Stack) ->
-    Stack.
-
-
-%% stack_level() -> Le
-%% stack_level(Stack) -> Le
-%% Top call level
-stack_level() ->
-    stack_level(get(stack)).
-
-stack_level([]) -> 1;
-stack_level([{Le,_}|_]) -> Le.
-
-%% fix_stacktrace(Start) -> Stacktrace
-%%   Start = 1|2
-%%   Stacktrace = [{M,F,Args|Arity} | {Fun,Args}]
-%% Convert internal stack format to imitation of regular stacktrace.
-%% Max three elements, no repeated (recursive) calls to the same
-%% function and convert argument lists to arity for all but topmost
-%% entry (and funs).
-%% 'Start' indicates where at get(stack) to start. This somewhat ugly
-%% solution is because fix_stacktrace has two uses: 1) to imitate
-%% the stacktrace in the case of an exception in the interpreted code,
-%% in which case the current call (top of the stack = first of the list)
-%% should be included, and 2) to send a current stacktrace to Debugged
-%% when evaluation passes into non-interpreted code, in which case
-%% the current call should NOT be included (as it is Debugged which
-%% will make the actual function call).
-fix_stacktrace(Start) ->
-    case fix_stacktrace2(sublist(get(stack), Start, 3)) of
-	[] ->
-	    [];
-	[H|T] ->
-	    [H|args2arity(T)]
-    end.
-
-sublist([], _Start, _Length) ->
-    []; % workaround, lists:sublist([],2,3) fails
-sublist(L, Start, Length) ->
-    lists:sublist(L, Start, Length).
-
-fix_stacktrace2([{_,{{M,F,As1},_,_}}, {_,{{M,F,As2},_,_}}|_])
-  when length(As1) =:= length(As2) ->
-    [{M,F,As1}];
-fix_stacktrace2([{_,{{Fun,As1},_,_}}, {_,{{Fun,As2},_,_}}|_])
-  when length(As1) =:= length(As2) ->
-    [{Fun,As1}];
-fix_stacktrace2([{_,{MFA,_,_}}|Entries]) ->
-    [MFA|fix_stacktrace2(Entries)];
-fix_stacktrace2([]) ->
-    [].
-
-args2arity([{M,F,As}|Entries]) when is_list(As) ->
-    [{M,F,length(As)}|args2arity(Entries)];
-args2arity([Entry|Entries]) ->
-    [Entry|args2arity(Entries)];
-args2arity([]) ->
-    [].
-
-%% bindings(SP) -> Bs
-%%   SP = Le  % stack pointer
-%% Return the bindings for the specified call level
-bindings(SP) ->
-    bindings(SP, get(stack)).
-
-bindings(SP, [{SP,{_MFA,_Wh,Bs}}|_]) ->
-    Bs;
-bindings(SP, [_Entry|Entries]) ->
-    bindings(SP, Entries);
-bindings(_SP, []) ->
-    erl_eval:new_bindings().
-
-%% stack_frame(Dir, SP) -> {Le, Where, Bs} | top | bottom
-%%   Dir = up | down
-%%   Where = {Cm, Li}
-%%     Cm = Module | undefined  % module
-%%     Li = int()  | -1         % line number
-%%     Bs = bindings()
-%% Return stack frame info one step up/down from given stack pointer
-%%  up = to lower call levels
-%%  down = to higher call levels
-stack_frame(up, SP) ->
-    stack_frame(SP, up, get(stack));
-stack_frame(down, SP) ->
-    stack_frame(SP, down, lists:reverse(get(stack))).
-
-stack_frame(SP, up, [{Le, {_MFA,Where,Bs}}|_]) when Le<SP ->
-    {Le, Where, Bs};
-stack_frame(SP, down, [{Le, {_MFA,Where,Bs}}|_]) when Le>SP ->
-    {Le, Where, Bs};
-stack_frame(SP, Dir, [{SP, _}|Stack]) ->
-    case Stack of
-	[{Le, {_MFA,Where,Bs}}|_] ->
-	    {Le, Where, Bs};
-	[] when Dir =:= up ->
-	    top;
-	[] when Dir =:= down ->
-	    bottom
-    end;
-stack_frame(SP, Dir, [_Entry|Stack]) ->
-    stack_frame(SP, Dir, Stack).
-
-%% backtrace(HowMany) -> Backtrace
-%%   HowMany = all | int()
-%%   Backtrace = {Le, MFA}
-%% Return all/the last N called functions, in reversed call order
-backtrace(HowMany) ->
-    Stack = case HowMany of
-		all -> get(stack);
-		N -> lists:sublist(get(stack), N)
-	    end,
-    [{Le, MFA} || {Le,{MFA,_Wh,_Bs}} <- Stack].
-
 %%--Trace function----------------------------------------------------
 
 %%--------------------------------------------------------------------
@@ -558,7 +385,7 @@ format_args1([]) ->
 
 %% Mimic catch behaviour
 catch_value(error, Reason) ->
-    {'EXIT',{Reason,get(stacktrace)}};
+    {'EXIT',{Reason,get_stacktrace()}};
 catch_value(exit, Reason) ->
     {'EXIT',Reason};
 catch_value(throw, Reason) ->
@@ -570,11 +397,13 @@ catch_value(throw, Reason) ->
 %% Top level function of meta evaluator. 
 %% Return message to be replied to the target process.
 %%--------------------------------------------------------------------
-eval_mfa(Debugged, M, F, As, Ieval) ->
+eval_mfa(Debugged, M, F, As, #ieval{level=Le}=Ieval0) ->
     Int = get(int),
     Bs = erl_eval:new_bindings(),
-    try eval_function(M,F,As,Bs,extern,Ieval#ieval{last_call=true}) of
+    Ieval = Ieval0#ieval{level=Le+1,top=true},
+    try do_eval_function(M, F, As, Bs, extern, Ieval) of
 	{value, Val, _Bs} ->
+	    trace(return, {Le,Val}),
 	    {ready, Val}
     catch
 	exit:{Debugged, Reason} ->
@@ -582,76 +411,68 @@ eval_mfa(Debugged, M, F, As, Ieval) ->
 	exit:{Int, Reason} ->
 	    exit(Reason);
 	Class:Reason ->
-	    {exception, {Class, Reason, get(stacktrace)}}
+	    {exception, {Class, Reason, get_stacktrace()}}
+    end.
+
+eval_function(Mod, Name, As, Bs, Called, Ieval0, Lc) ->
+    Tail = Lc andalso get(trace_stack) =:= no_tail,
+    case Tail of
+	false ->
+	    Ieval = dbg_istk:push(Bs, Ieval0, Lc),
+	    {value,Val,_} = do_eval_function(Mod, Name, As, Bs, Called, Ieval),
+	    dbg_istk:pop(),
+	    trace(return, {Ieval#ieval.level,Val}),
+	    {value,Val,Bs};
+	true ->
+	    do_eval_function(Mod, Name, As, Bs, Called, Ieval0)
     end.
 
-eval_function(Mod, Fun, As0, Bs0, _Called, Ieval) when is_function(Fun);
-						       Mod =:= ?MODULE,
-						       Fun =:= eval_fun ->
-    #ieval{level=Le, line=Li, last_call=Lc} = Ieval,
+do_eval_function(Mod, Fun, As0, Bs0, _, Ieval0) when is_function(Fun);
+						    Mod =:= ?MODULE,
+						    Fun =:= eval_fun ->
+    #ieval{level=Le,line=Li,top=Top} = Ieval0,
     case lambda(Fun, As0) of
-	{Cs,Module,Name,As,Bs} ->
-	    push({Module,Name,As}, Bs0, Ieval),
+	{[{clause,Fc,_,_,_}|_]=Cs,Module,Name,As,Bs} ->
+	    Ieval = Ieval0#ieval{module=Module,function=Name,
+				 arguments=As0,line=Fc},
 	    trace(call_fun, {Le,Li,Name,As}),
-	    {value, Val, _Bs} =
-		fnk_clauses(Cs, Module, Name, As, Bs,
-			    Ieval#ieval{level=Le+1}),
-	    pop(),
-	    trace(return, {Le,Val}),
-	    {value, Val, Bs0};
+	    fnk_clauses(Cs, As, Bs, Ieval);
 
-	not_interpreted when Lc -> % We are leaving interpreted code
+	not_interpreted when Top -> % We are leaving interpreted code
 	    trace(call_fun, {Le,Li,Fun,As0}),
 	    {value, {dbg_apply,erlang,apply,[Fun,As0]}, Bs0};
 	not_interpreted ->
-	    push({Fun,As0}, Bs0, Ieval),
 	    trace(call_fun, {Le,Li,Fun,As0}),
-	    {value, Val, _Bs} =
-		debugged_cmd({apply,erlang,apply,[Fun,As0]},Bs0,
-			     Ieval#ieval{level=Le+1}),
-	    pop(),
-	    trace(return, {Le,Val}),
-	    {value, Val, Bs0};
+	    debugged_cmd({apply,erlang,apply,[Fun,As0]}, Bs0, Ieval0);
 
 	{error,Reason} ->
 	    %% It's ok not to push anything in this case, the error
 	    %% reason contains information about the culprit
 	    %% ({badarity,{{Mod,Name},As}})
-	    exception(error, Reason, Bs0, Ieval)
+	    exception(error, Reason, Bs0, Ieval0)
     end;
 
 %% Common Test adaptation
-eval_function(ct_line, line, As, Bs, extern, #ieval{level=Le}=Ieval) ->
+do_eval_function(ct_line, line, As, Bs, extern, #ieval{level=Le}=Ieval) ->
     debugged_cmd({apply,ct_line,line,As}, Bs, Ieval#ieval{level=Le+1}),
     {value, ignore, Bs};
 
-eval_function(Mod, Name, As0, Bs0, Called, Ieval) ->
-    #ieval{level=Le, line=Li, last_call=Lc} = Ieval,
-
-    push({Mod,Name,As0}, Bs0, Ieval),
+do_eval_function(Mod, Name, As0, Bs0, Called, Ieval0) ->
+    #ieval{level=Le,line=Li,top=Top} = Ieval0,
     trace(call, {Called, {Le,Li,Mod,Name,As0}}),
-
+    Ieval = Ieval0#ieval{module=Mod,function=Name,arguments=As0},
     case get_function(Mod, Name, As0, Called) of
-	Cs when is_list(Cs) ->
-	    {value, Val, _Bs} =
-		fnk_clauses(Cs, Mod, Name, As0, erl_eval:new_bindings(),
-			    Ieval#ieval{level=Le+1}),
-	    pop(),
-	    trace(return, {Le,Val}),
-	    {value, Val, Bs0};
+	[{clause,FcLine,_,_,_}|_]=Cs ->
+	    fnk_clauses(Cs, As0, erl_eval:new_bindings(),
+			Ieval#ieval{line=FcLine});
 
-	not_interpreted when Lc -> % We are leaving interpreted code
+	not_interpreted when Top -> % We are leaving interpreted code
 	    {value, {dbg_apply,Mod,Name,As0}, Bs0};
 	not_interpreted ->
-	    {value, Val, _Bs} =
-		debugged_cmd({apply,Mod,Name,As0}, Bs0,
-			     Ieval#ieval{level=Le+1}),
-	    pop(),
-	    trace(return, {Le,Val}),
-	    {value, Val, Bs0};
+	    debugged_cmd({apply,Mod,Name,As0}, Bs0, Ieval);
 
 	undef ->
-	    exception(error, undef, Bs0, Ieval)
+	    exception(error, undef, Bs0, Ieval, true)
     end.
 
 lambda(eval_fun, [Cs,As,Bs,{Mod,Name}=F]) ->
@@ -752,23 +573,21 @@ cached(Key) ->
 
 %% Try to find a matching function clause
 %% #ieval.level is set, the other fields must be set in this function
-fnk_clauses([{clause,Line,Pars,Gs,Body}|Cs], M, F, As, Bs0, Ieval) ->
+fnk_clauses([{clause,Line,Pars,Gs,Body}|Cs], As, Bs0, Ieval) ->
     case head_match(Pars, As, [], Bs0) of
 	{match,Bs1} ->
 	    Bs = add_bindings(Bs1, Bs0),
 	    case guard(Gs, Bs) of
 		true ->
-		    seq(Body, Bs,
-			Ieval#ieval{line=Line,
-				    module=M,function=F,arguments=As});
+		    seq(Body, Bs, Ieval#ieval{line=Line});
 		false ->
-		    fnk_clauses(Cs, M, F, As, Bs0, Ieval)
+		    fnk_clauses(Cs, As, Bs0, Ieval)
 	    end;
 	nomatch ->
-	    fnk_clauses(Cs, M, F, As, Bs0, Ieval)
+	    fnk_clauses(Cs, As, Bs0, Ieval)
     end;
-fnk_clauses([], _M, _F, _As, Bs, Ieval) ->
-    exception(error, function_clause, Bs, Ieval).
+fnk_clauses([], _As, Bs, Ieval) ->
+    exception(error, function_clause, Bs, Ieval, true).
 
 seq([E], Bs0, Ieval) ->
     case dbg_icmd:cmd(E, Bs0, Ieval) of
@@ -782,7 +601,7 @@ seq([E|Es], Bs0, Ieval) ->
 	{skip,Bs} ->
 	    seq(Es, Bs, Ieval);
 	Bs1 ->
-	    {value,_,Bs} = expr(E, Bs1, Ieval#ieval{last_call=false}),
+	    {value,_,Bs} = expr(E, Bs1, Ieval#ieval{top=false}),
 	    seq(Es, Bs, Ieval)
     end;
 seq([], Bs, _) ->
@@ -804,10 +623,9 @@ expr({value,Val}, Bs, _Ieval) -> % Special case straight values
 
 %% List
 expr({cons,Line,H0,T0}, Bs0, Ieval0) ->
-    Ieval = Ieval0#ieval{line=Line},
-    Ieval1 = Ieval#ieval{last_call=false},
-    {value,H,Bs1} = expr(H0,Bs0,Ieval1),
-    {value,T,Bs2} = expr(T0,Bs0,Ieval1),
+    Ieval = Ieval0#ieval{line=Line,top=false},
+    {value,H,Bs1} = expr(H0, Bs0, Ieval),
+    {value,T,Bs2} = expr(T0, Bs0, Ieval),
     {value,[H|T],merge_bindings(Bs2, Bs1, Ieval)};
 
 %% Tuple
@@ -821,12 +639,12 @@ expr({block,Line,Es},Bs,Ieval) ->
 
 %% Catch statement
 expr({'catch',Line,Expr}, Bs0, Ieval) ->
-    try expr(Expr, Bs0, Ieval#ieval{line=Line, last_call=false})
+    try expr(Expr, Bs0, Ieval#ieval{line=Line, top=false})
     catch
 	Class:Reason ->
 	    %% Exception caught, reset exit info
 	    put(exit_info, undefined),
-	    pop(Ieval#ieval.level),
+	    dbg_istk:pop(Ieval#ieval.level),
 	    Value = catch_value(Class, Reason),
 	    trace(return, {Ieval#ieval.level,Value}),
 	    {value, Value, Bs0}
@@ -835,7 +653,7 @@ expr({'catch',Line,Expr}, Bs0, Ieval) ->
 %% Try-catch statement
 expr({'try',Line,Es,CaseCs,CatchCs,[]}, Bs0, Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
-    try seq(Es, Bs0, Ieval#ieval{last_call=false}) of
+    try seq(Es, Bs0, Ieval#ieval{top=false}) of
 	{value,Val,Bs} = Value ->
 	    case CaseCs of
 		[] -> Value;
@@ -848,7 +666,7 @@ expr({'try',Line,Es,CaseCs,CatchCs,[]}, Bs0, Ieval0) ->
     end;
 expr({'try',Line,Es,CaseCs,CatchCs,As}, Bs0, Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
-    try seq(Es, Bs0, Ieval#ieval{last_call=false}) of
+    try seq(Es, Bs0, Ieval#ieval{top=false}) of
 	{value,Val,Bs} = Value ->
 	    case CaseCs of
 		[] -> Value;
@@ -859,13 +677,13 @@ expr({'try',Line,Es,CaseCs,CatchCs,As}, Bs0, Ieval0) ->
 	Class:Reason when CatchCs =/= [] ->
 	    catch_clauses({Class,Reason,[]}, CatchCs, Bs0, Ieval)
     after
-            seq(As, Bs0, Ieval#ieval{last_call=false})
+            seq(As, Bs0, Ieval#ieval{top=false})
     end;
 
 %% Case statement
 expr({'case',Line,E,Cs}, Bs0, Ieval) ->
     {value,Val,Bs} =
-	expr(E, Bs0, Ieval#ieval{line=Line, last_call=false}),
+	expr(E, Bs0, Ieval#ieval{line=Line, top=false}),
     case_clauses(Val, Cs, Bs, case_clause, Ieval#ieval{line=Line});
 
 %% If statement
@@ -874,20 +692,20 @@ expr({'if',Line,Cs}, Bs, Ieval) ->
 
 %% Andalso/orelse
 expr({'andalso',Line,E1,E2}, Bs, Ieval) ->
-    case expr(E1, Bs, Ieval#ieval{line=Line, last_call=false}) of
+    case expr(E1, Bs, Ieval#ieval{line=Line, top=false}) of
 	{value,false,_}=Res ->
 	    Res;
 	{value,true,_} -> 
-	    expr(E2, Bs, Ieval#ieval{line=Line, last_call=false});
+	    expr(E2, Bs, Ieval#ieval{line=Line, top=false});
 	{value,Val,Bs} ->
 	    exception(error, {badarg,Val}, Bs, Ieval)
     end;
 expr({'orelse',Line,E1,E2}, Bs, Ieval) ->
-    case expr(E1, Bs, Ieval#ieval{line=Line, last_call=false}) of
+    case expr(E1, Bs, Ieval#ieval{line=Line, top=false}) of
 	{value,true,_}=Res ->
 	    Res;
 	{value,false,_} ->
-	    expr(E2, Bs, Ieval#ieval{line=Line, last_call=false});
+	    expr(E2, Bs, Ieval#ieval{line=Line, top=false});
 	{value,Val,_} ->
 	    exception(error, {badarg,Val}, Bs, Ieval)
     end;
@@ -895,7 +713,7 @@ expr({'orelse',Line,E1,E2}, Bs, Ieval) ->
 %% Matching expression
 expr({match,Line,Lhs,Rhs0}, Bs0, Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
-    {value,Rhs,Bs1} = expr(Rhs0, Bs0, Ieval#ieval{last_call=false}),
+    {value,Rhs,Bs1} = expr(Rhs0, Bs0, Ieval#ieval{top=false}),
     case match(Lhs, Rhs, Bs1) of
 	{match,Bs} ->
 	    {value,Rhs,Bs};
@@ -951,21 +769,21 @@ expr({make_fun,Line,Name,Cs}, Bs, #ieval{module=Module}=Ieval) ->
     {value,Fun,Bs};
 
 %% Common test adaptation
-expr({call_remote,0,ct_line,line,As0}, Bs0, Ieval0) ->
+expr({call_remote,0,ct_line,line,As0,Lc}, Bs0, Ieval0) ->
     {As,_Bs} = eval_list(As0, Bs0, Ieval0),
-    eval_function(ct_line, line, As, Bs0, extern, Ieval0);
+    eval_function(ct_line, line, As, Bs0, extern, Ieval0, Lc);
 
 %% Local function call
-expr({local_call,Line,F,As0}, Bs0, #ieval{module=M} = Ieval0) ->
+expr({local_call,Line,F,As0,Lc}, Bs0, #ieval{module=M} = Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
     {As,Bs} = eval_list(As0, Bs0, Ieval),
-    eval_function(M, F, As, Bs, local, Ieval);
+    eval_function(M, F, As, Bs, local, Ieval, Lc);
 
 %% Remote function call
-expr({call_remote,Line,M,F,As0}, Bs0, Ieval0) ->
+expr({call_remote,Line,M,F,As0,Lc}, Bs0, Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
     {As,Bs} = eval_list(As0, Bs0, Ieval),
-    eval_function(M, F, As, Bs, extern, Ieval);
+    eval_function(M, F, As, Bs, extern, Ieval, Lc);
 
 %% Emulated semantics of some BIFs
 expr({dbg,Line,self,[]}, Bs, #ieval{level=Le}) ->
@@ -975,9 +793,28 @@ expr({dbg,Line,self,[]}, Bs, #ieval{level=Le}) ->
     {value,Self,Bs};
 expr({dbg,Line,get_stacktrace,[]}, Bs, #ieval{level=Le}) ->
     trace(bif, {Le,Line,erlang,get_stacktrace,[]}),
-    Stacktrace = get(stacktrace),
+    Stacktrace = get_stacktrace(),
     trace(return, {Le,Stacktrace}),
     {value,Stacktrace,Bs};
+expr({dbg,Line,raise,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
+    %% Since erlang:get_stacktrace/0 is emulated, we will
+    %% need to emulate erlang:raise/3 too so that we can
+    %% capture the stacktrace.
+    Ieval = Ieval0#ieval{line=Line},
+    {[Class,Reason,Stk0]=As,Bs} = eval_list(As0, Bs0, Ieval),
+    trace(bif, {Le,Line,erlang,raise,As}),
+    try
+	%% Evaluate raise/3 for error checking and
+	%% truncating of the stacktrace to the correct depth.
+	Error = erlang:raise(Class, Reason, Stk0),
+	trace(return, {Le,Error}),
+	{value,Error,Bs}
+    catch
+	_:_ ->
+	    Stk = erlang:get_stacktrace(),	%Possibly truncated.
+	    StkFun = fun(_) -> Stk end,
+	    do_exception(Class, Reason, StkFun, Bs, Ieval)
+    end;
 expr({dbg,Line,throw,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
     {[Term],Bs} = eval_list(As0, Bs0, Ieval),
@@ -988,11 +825,6 @@ expr({dbg,Line,error,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
     {[Term],Bs} = eval_list(As0, Bs0, Ieval),
     trace(bif, {Le,Line,erlang,error,[Term]}),
     exception(error, Term, Bs, Ieval);
-expr({dbg,Line,fault,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
-    Ieval = Ieval0#ieval{line=Line},
-    {[Term],Bs} = eval_list(As0, Bs0, Ieval),
-    trace(bif, {Le,Line,erlang,fault,[Term]}),
-    exception(fault, Term, Bs, Ieval);
 expr({dbg,Line,exit,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
     {[Term],Bs} = eval_list(As0, Bs0, Ieval),
@@ -1001,36 +833,26 @@ expr({dbg,Line,exit,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
 
 %% Call to "safe" BIF, ie a BIF that can be executed in Meta process
 expr({safe_bif,Line,M,F,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
-    Ieval = Ieval0#ieval{line=Line},
-    {As,Bs} = eval_list(As0, Bs0, Ieval),
+    Ieval1 = Ieval0#ieval{line=Line},
+    {As,Bs} = eval_list(As0, Bs0, Ieval1),
     trace(bif, {Le,Line,M,F,As}),
-    push({M,F,As}, Bs0, Ieval),
+    Ieval2 = dbg_istk:push(Bs0, Ieval1, false),
+    Ieval = Ieval2#ieval{module=M,function=F,arguments=As,line=-1},
     {_,Value,_} = Res = safe_bif(M, F, As, Bs, Ieval),
     trace(return, {Le,Value}),
-    pop(),
+    dbg_istk:pop(),
     Res;
 
 %% Call to a BIF that must be evaluated in the correct process
 expr({bif,Line,M,F,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
-    Ieval = Ieval0#ieval{line=Line},
-    {As,Bs} = eval_list(As0, Bs0, Ieval),
+    Ieval1 = Ieval0#ieval{line=Line},
+    {As,Bs} = eval_list(As0, Bs0, Ieval1),
     trace(bif, {Le,Line,M,F,As}),
-    push({M,F,As}, Bs0, Ieval),
-    {_,Value,_} =
-	Res = debugged_cmd({apply,M,F,As}, Bs, Ieval#ieval{level=Le+1}),
+    Ieval2 = dbg_istk:push(Bs0, Ieval1, false),
+    Ieval = Ieval2#ieval{module=M,function=F,arguments=As,line=-1},
+    {_,Value,_} = Res = debugged_cmd({apply,M,F,As}, Bs, Ieval),
     trace(return, {Le,Value}),
-    pop(),
-    Res;
-
-%% Call to a BIF that spawns a new process
-expr({spawn_bif,Line,M,F,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
-    Ieval = Ieval0#ieval{line=Line},
-    {As,Bs} = eval_list(As0, Bs0, Ieval),
-    trace(bif, {Le,Line,M,F,As}),
-    push({M,F,As}, Bs0, Ieval),
-    Res = debugged_cmd({apply,M,F,As}, Bs,Ieval#ieval{level=Le+1}),
-    trace(return, {Le,Res}),
-    pop(),
+    dbg_istk:pop(),
     Res;
 
 %% Call to an operation
@@ -1046,7 +868,7 @@ expr({op,Line,Op,As0}, Bs0, Ieval0) ->
     end;
 
 %% apply/2 (fun)
-expr({apply_fun,Line,Fun0,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
+expr({apply_fun,Line,Fun0,As0,Lc}, Bs0, #ieval{level=Le}=Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
     FunValue = case expr(Fun0, Bs0, Ieval) of
 		   {value,{dbg_apply,Mx,Fx,Asx},Bsx} ->
@@ -1058,31 +880,20 @@ expr({apply_fun,Line,Fun0,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
     case FunValue of
 	{value,Fun,Bs1} when is_function(Fun) ->
 	    {As,Bs} = eval_list(As0, Bs1, Ieval),
-	    eval_function(undefined, Fun, As, Bs, extern, Ieval);
+	    eval_function(undefined, Fun, As, Bs, extern, Ieval, Lc);
 	{value,{M,F},Bs1} when is_atom(M), is_atom(F) ->
 	    {As,Bs} = eval_list(As0, Bs1, Ieval),
-	    eval_function(M, F, As, Bs, extern, Ieval);
+	    eval_function(M, F, As, Bs, extern, Ieval, Lc);
 	{value,BadFun,Bs1} ->
 	    exception(error, {badfun,BadFun}, Bs1, Ieval)
     end;
 
 %% apply/3
-expr({apply,Line,As0}, Bs0, Ieval0) ->
+expr({apply,Line,As0,Lc}, Bs0, Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
     {[M,F,As],Bs} = eval_list(As0, Bs0, Ieval),
-    eval_function(M, F, As, Bs, extern, Ieval);
+    eval_function(M, F, As, Bs, extern, Ieval, Lc);
     
-%% Mod:module_info/0,1
-expr({module_info_0,_,Mod}, Bs, _Ieval) ->
-    {value,[{compile,module_info(Mod,compile)},
-	    {attributes,module_info(Mod,attributes)},
-	    {imports,module_info(Mod,imports)},
-	    {exports,module_info(Mod,exports)}],Bs};
-expr({module_info_1,Line,Mod,[As0]}, Bs0, Ieval0) ->
-    Ieval = Ieval0#ieval{line=Line},
-    {value,What,Bs} = expr(As0, Bs0, Ieval),
-    {value,module_info(Mod, What),Bs};
-
 %% Receive statement
 expr({'receive',Line,Cs}, Bs0, #ieval{level=Le}=Ieval) ->
     trace(receivex, {Le,false}),
@@ -1091,7 +902,7 @@ expr({'receive',Line,Cs}, Bs0, #ieval{level=Le}=Ieval) ->
 %% Receive..after statement
 expr({'receive',Line,Cs,To,ToExprs}, Bs0, #ieval{level=Le}=Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
-    {value,ToVal,ToBs} = expr(To, Bs0, Ieval#ieval{last_call=false}),
+    {value,ToVal,ToBs} = expr(To, Bs0, Ieval#ieval{top=false}),
     trace(receivex, {Le,true}),
     check_timeoutvalue(ToVal, ToBs, To, Ieval),
     {Stamp,_} = statistics(wall_clock),
@@ -1101,7 +912,7 @@ expr({'receive',Line,Cs,To,ToExprs}, Bs0, #ieval{level=Le}=Ieval0) ->
 %% Send (!)
 expr({send,Line,To0,Msg0}, Bs0, Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
-    Ieval1 = Ieval#ieval{last_call=false},
+    Ieval1 = Ieval#ieval{top=false},
     {value,To,Bs1} = expr(To0, Bs0, Ieval1),
     {value,Msg,Bs2} = expr(Msg0, Bs0, Ieval1),
     Bs = merge_bindings(Bs2, Bs1, Ieval),
@@ -1110,10 +921,15 @@ expr({send,Line,To0,Msg0}, Bs0, Ieval0) ->
 %% Binary
 expr({bin,Line,Fs}, Bs0, Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
-    eval_bits:expr_grp(Fs, Bs0,
-		       fun (E, B) -> expr(E, B, Ieval) end,
-		       [],
-		       false);
+    try
+	eval_bits:expr_grp(Fs, Bs0,
+			   fun (E, B) -> expr(E, B, Ieval) end,
+			   [],
+			   false)
+    catch
+	Class:Reason ->
+	    exception(Class, Reason, Bs0, Ieval)
+    end;
 
 %% List comprehension
 expr({lc,_Line,E,Qs}, Bs, Ieval) ->
@@ -1138,12 +954,12 @@ eval_lc(E, Qs, Bs, Ieval) ->
 
 eval_lc1(E, [{generate,Line,P,L0}|Qs], Bs0, Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
-    {value,L1,Bs1} = expr(L0, Bs0, Ieval#ieval{last_call=false}),
+    {value,L1,Bs1} = expr(L0, Bs0, Ieval#ieval{top=false}),
     CompFun = fun(NewBs) -> eval_lc1(E, Qs, NewBs, Ieval) end,
     eval_generate(L1, P, Bs1, CompFun, Ieval);
 eval_lc1(E, [{b_generate,Line,P,L0}|Qs], Bs0, Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
-    {value,Bin,_} = expr(L0, Bs0, Ieval#ieval{last_call=false}),
+    {value,Bin,_} = expr(L0, Bs0, Ieval#ieval{top=false}),
     CompFun = fun(NewBs) -> eval_lc1(E, Qs, NewBs, Ieval) end,
     eval_b_generate(Bin, P, Bs0, CompFun, Ieval);
 eval_lc1(E, [{guard,Q}|Qs], Bs0, Ieval) ->
@@ -1152,13 +968,13 @@ eval_lc1(E, [{guard,Q}|Qs], Bs0, Ieval) ->
 	false -> []
     end;
 eval_lc1(E, [Q|Qs], Bs0, Ieval) ->
-    case expr(Q, Bs0, Ieval#ieval{last_call=false}) of
+    case expr(Q, Bs0, Ieval#ieval{top=false}) of
 	{value,true,Bs} -> eval_lc1(E, Qs, Bs, Ieval);
 	{value,false,_Bs} -> [];
 	{value,V,Bs} -> exception(error, {bad_filter,V}, Bs, Ieval)
     end;
 eval_lc1(E, [], Bs, Ieval) ->
-    {value,V,_} = expr(E, Bs, Ieval#ieval{last_call=false}),
+    {value,V,_} = expr(E, Bs, Ieval#ieval{top=false}),
     [V].
 
 %% eval_bc(Expr,[Qualifier],Bindings,IevalState) ->
@@ -1171,12 +987,12 @@ eval_bc(E, Qs, Bs, Ieval) ->
 
 eval_bc1(E, [{generate,Line,P,L0}|Qs], Bs0, Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
-    {value,L1,Bs1} = expr(L0, Bs0, Ieval#ieval{last_call=false}),
+    {value,L1,Bs1} = expr(L0, Bs0, Ieval#ieval{top=false}),
     CompFun = fun(NewBs) -> eval_bc1(E, Qs, NewBs, Ieval) end,
     eval_generate(L1, P, Bs1, CompFun, Ieval);
 eval_bc1(E, [{b_generate,Line,P,L0}|Qs], Bs0, Ieval0) ->
     Ieval = Ieval0#ieval{line=Line},
-    {value,Bin,_} = expr(L0, Bs0, Ieval#ieval{last_call=false}),
+    {value,Bin,_} = expr(L0, Bs0, Ieval#ieval{top=false}),
     CompFun = fun(NewBs) -> eval_bc1(E, Qs, NewBs, Ieval) end,
     eval_b_generate(Bin, P, Bs0, CompFun, Ieval);
 eval_bc1(E, [{guard,Q}|Qs], Bs0, Ieval) ->
@@ -1185,13 +1001,13 @@ eval_bc1(E, [{guard,Q}|Qs], Bs0, Ieval) ->
 	false -> []
     end;
 eval_bc1(E, [Q|Qs], Bs0, Ieval) ->
-    case expr(Q, Bs0, Ieval#ieval{last_call=false}) of
+    case expr(Q, Bs0, Ieval#ieval{top=false}) of
 	{value,true,Bs} -> eval_bc1(E, Qs, Bs, Ieval);
 	{value,false,_Bs} -> [];
 	{value,V,Bs} -> exception(error, {bad_filter,V}, Bs, Ieval)
     end;
 eval_bc1(E, [], Bs, Ieval) ->
-    {value,V,_} = expr(E, Bs, Ieval#ieval{last_call=false}),
+    {value,V,_} = expr(E, Bs, Ieval#ieval{top=false}),
     [V].
 
 eval_generate([V|Rest], P, Bs0, CompFun, Ieval) ->
@@ -1208,7 +1024,7 @@ eval_generate(Term, _P, Bs, _CompFun, Ieval) ->
     exception(error, {bad_generator,Term}, Bs, Ieval).
 
 eval_b_generate(<<_/bitstring>>=Bin, P, Bs0, CompFun, Ieval) ->
-    Mfun = fun(L, R, Bs) -> match1(L, R, Bs, Bs0) end,
+    Mfun = match_fun(Bs0),
     Efun = fun(Exp, Bs) -> expr(Exp, Bs, #ieval{}) end,
     case eval_bits:bin_gen(P, Bin, erl_eval:new_bindings(), Bs0, Mfun, Efun) of
 	{match,Rest,Bs1} ->
@@ -1222,24 +1038,13 @@ eval_b_generate(<<_/bitstring>>=Bin, P, Bs0, CompFun, Ieval) ->
 eval_b_generate(Term, _P, Bs, _CompFun, Ieval) ->
     exception(error, {bad_generator,Term}, Bs, Ieval).
 
-module_info(Mod, module) -> Mod;
-module_info(_Mod, compile) -> [];
-module_info(Mod, attributes) ->
-    {ok, Attr} = dbg_iserver:call(get(int), {lookup, Mod, attributes}),
-    Attr;
-module_info(_Mod, imports) -> [];
-module_info(Mod, exports) ->
-    {ok, Exp} = dbg_iserver:call(get(int), {lookup, Mod, exports}),
-    Exp;
-module_info(_Mod, functions) -> [].
-
 safe_bif(M, F, As, Bs, Ieval) ->
     try apply(M, F, As) of
        	Value ->
 	    {value,Value,Bs}
     catch
 	Class:Reason ->
-	    exception(Class, Reason, Bs, Ieval)
+	    exception(Class, Reason, Bs, Ieval, true)
     end.
 
 eval_send(To, Msg, Bs, Ieval) ->
@@ -1408,12 +1213,12 @@ flush_traces(Debugged) ->
 %% eval_list(ExpressionList, Bindings, Ieval)
 %%  Evaluate a list of expressions "in parallel" at the same level.
 eval_list(Es, Bs, Ieval) ->
-    eval_list(Es, [], Bs, Bs, Ieval).
+    eval_list_1(Es, [], Bs, Bs, Ieval#ieval{top=false}).
 
-eval_list([E|Es], Vs, BsOrig, Bs0, Ieval) ->
-    {value,V,Bs1} = expr(E, BsOrig, Ieval#ieval{last_call=false}),
-    eval_list(Es, [V|Vs], BsOrig, merge_bindings(Bs1,Bs0,Ieval), Ieval);
-eval_list([], Vs, _, Bs, _Ieval) ->
+eval_list_1([E|Es], Vs, BsOrig, Bs0, Ieval) ->
+    {value,V,Bs1} = expr(E, BsOrig, Ieval),
+    eval_list_1(Es, [V|Vs], BsOrig, merge_bindings(Bs1, Bs0, Ieval), Ieval);
+eval_list_1([], Vs, _, Bs, _Ieval) ->
     {lists:reverse(Vs,[]),Bs}.
 
 %% if_clauses(Clauses, Bindings, Ieval)
@@ -1453,7 +1258,7 @@ catch_clauses(Exception, [{clause,_,[P],G,B}|CatchCs], Bs0, Ieval) ->
 		true ->
 		    %% Exception caught, reset exit info
 		    put(exit_info, undefined),
-		    pop(Ieval#ieval.level),
+		    dbg_istk:pop(Ieval#ieval.level),
 		    seq(B, Bs, Ieval);
 		false ->
 		    catch_clauses(Exception, CatchCs, Bs0, Ieval)
@@ -1588,11 +1393,9 @@ match1({cons,_,H,T}, [H1|T1], Bs0, BBs) ->
 match1({tuple,_,Elts}, Tuple, Bs, BBs) 
   when length(Elts) =:= tuple_size(Tuple) ->
     match_tuple(Elts, Tuple, 1, Bs, BBs);
-match1({bin,_,Fs}, B, Bs0, BBs0) when is_bitstring(B) ->
-    Bs1 = lists:sort(Bs0),  %Kludge.
-    BBs = lists:sort(BBs0),
-    try eval_bits:match_bits(Fs, B, Bs1, BBs,
-			     fun(L, R, Bs) -> match1(L, R, Bs, BBs) end,
+match1({bin,_,Fs}, B, Bs0, BBs) when is_bitstring(B) ->
+    try eval_bits:match_bits(Fs, B, Bs0, BBs,
+			     match_fun(BBs),
 			     fun(E, Bs) -> expr(E, Bs, #ieval{}) end,
 			     false)
     catch
@@ -1601,6 +1404,12 @@ match1({bin,_,Fs}, B, Bs0, BBs0) when is_bitstring(B) ->
 match1(_,_,_,_) ->
     throw(nomatch).
 
+match_fun(BBs) ->
+    fun(match, {L,R,Bs}) -> match1(L, R, Bs, BBs);
+       (binding, {Name,Bs}) -> binding(Name, Bs);
+       (add_binding, {Name,Val,Bs}) -> add_binding(Name, Val, Bs)
+    end.
+
 match_tuple([E|Es], Tuple, I, Bs0, BBs) ->
     {match,Bs} = match1(E, element(I, Tuple), Bs0, BBs),
     match_tuple(Es, Tuple, I+1, Bs, BBs);
@@ -1731,3 +1540,19 @@ add_binding(N,Val,[B1|Bs]) ->
     [B1|add_binding(N,Val,Bs)];
 add_binding(N,Val,[]) ->
     [{N,Val}].
+
+%% get_stacktrace() -> Stacktrace
+%%  Return the latest stacktrace for the process.
+get_stacktrace() ->
+    case get(stacktrace) of
+	MakeStk when is_function(MakeStk, 1) ->
+	    %% The stacktrace has not been constructed before.
+	    %% Construct it and remember the result.
+	    Depth = erlang:system_flag(backtrace_depth, 8),
+	    erlang:system_flag(backtrace_depth, Depth),
+	    Stk = MakeStk(Depth),
+	    put(stacktrace, Stk),
+	    Stk;
+	Stk when is_list(Stk) ->
+	    Stk
+    end.
diff --git a/lib/debugger/src/dbg_ieval.hrl b/lib/debugger/src/dbg_ieval.hrl
index a344748f48..ea6189ad02 100644
--- a/lib/debugger/src/dbg_ieval.hrl
+++ b/lib/debugger/src/dbg_ieval.hrl
@@ -21,6 +21,8 @@
 		module,           % MFA which called the currently
 		function,         %  interpreted function
 		arguments,        %
-		last_call = false % True if current expression is
-	       }).                % the VERY last to be evaluated
-                                  % (ie at all, not only in a clause)
+
+		%% True if the current expression is at the top level
+		%% (i.e. the next call will leave interpreted code).
+		top = false
+	       }).
diff --git a/lib/debugger/src/dbg_iload.erl b/lib/debugger/src/dbg_iload.erl
index db5a17ad2e..ce5631e45f 100644
--- a/lib/debugger/src/dbg_iload.erl
+++ b/lib/debugger/src/dbg_iload.erl
@@ -62,22 +62,23 @@ load_mod1(Mod, File, Binary, Db) ->
 store_module(Mod, File, Binary, Db) ->
     {interpreter_module, Exp, Abst, Src, MD5} = binary_to_term(Binary),
     Forms = case abstr(Abst) of
-		{abstract_v1,Forms0} -> Forms0;
-		{abstract_v2,Forms0} -> Forms0;
+		{abstract_v1,_} ->
+		    exit({Mod,too_old_beam_file});
+		{abstract_v2,_} ->
+		    exit({Mod,too_old_beam_file});
 		{raw_abstract_v1,Code0} ->
                     Code = interpret_file_attribute(Code0),
 		    {_,_,Forms0,_} = sys_pre_expand:module(Code, []),
 		    Forms0
 	    end,
     dbg_idb:insert(Db, mod_file, File),
-    dbg_idb:insert(Db, exports, Exp),
     dbg_idb:insert(Db, defs, []),
 
     put(vcount, 0),
     put(fun_count, 0),
     put(funs, []),
     put(mod_md5, MD5),
-    Attr = store_forms(Forms, Mod, Db, Exp, []),
+    store_forms(Forms, Mod, Db, Exp),
     erase(mod_md5),
     erase(current_function),
     %% store_funs(Db, Mod),
@@ -85,11 +86,10 @@ store_module(Mod, File, Binary, Db) ->
     erase(funs),
     erase(fun_count),
     
-    dbg_idb:insert(Db, attributes, Attr),
     NewBinary = store_mod_line_no(Mod, Db, binary_to_list(Src)),
     dbg_idb:insert(Db, mod_bin, NewBinary),
-    dbg_idb:insert(Db, mod_raw, <<Src/binary,0:8>>), %% Add eos
-    dbg_idb:insert(Db, module, Mod).
+    dbg_idb:insert(Db, mod_raw, <<Src/binary,0:8>>). %% Add eos
+
 %% Adjust line numbers using the file/2 attribute. 
 %% Also take the absolute value of line numbers.
 %% This simple fix will make the marker point at the correct line
@@ -111,27 +111,19 @@ abstr(Term) -> Term.
 %     store_funs_1(Fs, Db, Mod);
 % store_funs_1([], _, _) -> ok.
 
-store_forms([{function,_,module_info,0,_}|Fs], Mod, Db, Exp, Attr) ->
-    Cs = [{clause,0,[],[], [{module_info_0,0,Mod}]}],
-    dbg_idb:insert(Db, {Mod,module_info,0,true}, Cs),
-    store_forms(Fs, Mod, Db, Exp, Attr);
-store_forms([{function,_,module_info,1,_}|Fs], Mod, Db, Exp, Attr) ->
-    Cs = [{clause,0,[{var,0,'What'}],[], [{module_info_1,0,Mod,[{var,0,'What'}]}]}],
-    dbg_idb:insert(Db, {Mod,module_info,1,true}, Cs),
-    store_forms(Fs, Mod, Db, Exp, Attr);
-store_forms([{function,_,Name,Arity,Cs0}|Fs], Mod, Db, Exp, Attr) ->
+store_forms([{function,_,Name,Arity,Cs0}|Fs], Mod, Db, Exp) ->
     FA = {Name,Arity},
     put(current_function, FA),
     Cs = clauses(Cs0),
     Exported = lists:member(FA, Exp),
     dbg_idb:insert(Db, {Mod,Name,Arity,Exported}, Cs),
-    store_forms(Fs, Mod, Db, Exp, Attr);
-store_forms([{attribute,_,Name,Val}|Fs], Mod, Db, Exp, Attr) ->
-    store_forms(Fs, Mod, Db, Exp, [{Name,Val}|Attr]);
-store_forms([F|_], _Mod, _Db, _Exp, _Attr) ->
+    store_forms(Fs, Mod, Db, Exp);
+store_forms([{attribute,_,_Name,_Val}|Fs], Mod, Db, Exp) ->
+    store_forms(Fs, Mod, Db, Exp);
+store_forms([F|_], _Mod, _Db, _Exp) ->
     exit({unknown_form,F});
-store_forms([], _, _, _, Attr) ->
-    lists:reverse(Attr).
+store_forms([], _, _, _) ->
+    ok.
 
 store_mod_line_no(Mod, Db, Contents) ->
     store_mod_line_no(Mod, Db, Contents, 1, 0, []).
@@ -164,14 +156,14 @@ get_nl([],Pos,Head) -> {lists:reverse(Head),[],Pos}.
 %%% to interpret.
 
 clauses([C0|Cs]) ->
-    C1 = clause(C0),
+    C1 = clause(C0, true),
     [C1|clauses(Cs)];
 clauses([]) -> [].
 
-clause({clause,Line,H0,G0,B0}) ->
+clause({clause,Line,H0,G0,B0}, Lc) ->
     H1 = head(H0),
     G1 = guard(G0),
-    B1 = exprs(B0),
+    B1 = exprs(B0, Lc),
     {clause,Line,H1,G1,B1}.
 
 head(Ps) -> patterns(Ps).
@@ -219,7 +211,7 @@ pattern({bin,Line,Grp}) ->
     {bin,Line,Grp1};
 pattern({bin_element,Line,Expr,Size,Type}) ->
     Expr1 = pattern(Expr),
-    Size1 = expr(Size),
+    Size1 = expr(Size, false),
     {bin_element,Line,Expr1,Size1,Type}.
 
 %%  These patterns are processed "in parallel" for purposes of variable
@@ -235,8 +227,6 @@ guard([G0|Gs]) ->
     [G1|guard(Gs)];
 guard([]) -> [].
 
-and_guard([{atom,_,true}|Gs]) ->
-    and_guard(Gs);
 and_guard([G0|Gs]) ->
     G1 = guard_test(G0),
     [G1|and_guard(Gs)];
@@ -244,12 +234,7 @@ and_guard([]) -> [].
 
 guard_test({call,Line,{remote,_,{atom,_,erlang},{atom,_,F}},As0}) ->
     As = gexpr_list(As0),
-    case map_guard_bif(F, length(As0)) of
-	{ok,Name} ->
-	    {safe_bif,Line,erlang,Name,As};
-	error ->
-	    {safe_bif,Line,erlang,F,As}
-    end;
+    {safe_bif,Line,erlang,F,As};
 guard_test({op,Line,Op,L0}) ->
     true = erl_internal:arith_op(Op, 1) orelse %Assertion.
 	erl_internal:bool_op(Op, 1),
@@ -266,25 +251,18 @@ guard_test({op,Line,Op,L0,R0}) ->
     L1 = gexpr(L0),
     R1 = gexpr(R0),				%They see the same variables
     {safe_bif,Line,erlang,Op,[L1,R1]};
-guard_test({integer,_,_}=I) -> I;
-guard_test({char,_,_}=C) -> C;
-guard_test({float,_,_}=F) -> F;
-guard_test({atom,_,_}=A) -> A;
-guard_test({nil,_}=N) -> N;
-guard_test({var,_,_}=V) ->V.    % Boolean var
-
-map_guard_bif(integer, 1) -> {ok,is_integer};
-map_guard_bif(float, 1) -> {ok,is_float};
-map_guard_bif(number, 1) -> {ok,is_number};
-map_guard_bif(atom, 1) -> {ok,is_atom};
-map_guard_bif(list, 1) -> {ok,is_list};
-map_guard_bif(tuple, 1) -> {ok,is_tuple};
-map_guard_bif(pid, 1) -> {ok,is_pid};
-map_guard_bif(reference, 1) -> {ok,is_reference};
-map_guard_bif(port, 1) -> {ok,is_port};
-map_guard_bif(binary, 1) -> {ok,is_binary};
-map_guard_bif(function, 1) -> {ok,is_function};
-map_guard_bif(_, _) -> error.
+guard_test({var,_,_}=V) ->V;    % Boolean var
+guard_test({atom,Line,true}) -> {value,Line,true};
+%% All other constants at this level means false.
+guard_test({atom,Line,_}) -> {value,Line,false};
+guard_test({integer,Line,_}) -> {value,Line,false};
+guard_test({char,Line,_}) -> {value,Line,false};
+guard_test({float,Line,_}) -> {value,Line,false};
+guard_test({string,Line,_}) -> {value,Line,false};
+guard_test({nil,Line}) -> {value,Line,false};
+guard_test({cons,Line,_,_}) -> {value,Line,false};
+guard_test({tuple,Line,_}) -> {value,Line,false};
+guard_test({bin,Line,_}) ->  {value,Line,false}.
 
 gexpr({var,Line,V}) -> {var,Line,V};
 gexpr({integer,Line,I}) -> {value,Line,I};
@@ -341,186 +319,179 @@ gexpr_list([]) -> [].
 %%  These expressions are processed "sequentially" for purposes of variable
 %%  definition etc.
 
-exprs([E0|Es]) ->
-    E1 = expr(E0),
-    [E1|exprs(Es)];
-exprs([]) -> [].
-
-expr({var,Line,V}) -> {var,Line,V};
-expr({integer,Line,I}) -> {value,Line,I};
-expr({char,Line,I}) -> {value,Line,I};
-expr({float,Line,F}) -> {value,Line,F};
-expr({atom,Line,A}) -> {value,Line,A};
-expr({string,Line,S}) -> {value,Line,S};
-expr({nil,Line}) -> {value,Line,[]};
-expr({cons,Line,H0,T0}) ->
-    case {expr(H0),expr(T0)} of
+exprs([E], Lc) ->
+    [expr(E, Lc)];
+exprs([E0|Es], Lc) ->
+    E1 = expr(E0, false),
+    [E1|exprs(Es, Lc)];
+exprs([], _Lc) -> [].
+
+expr({var,Line,V}, _Lc) -> {var,Line,V};
+expr({integer,Line,I}, _Lc) -> {value,Line,I};
+expr({char,Line,I}, _Lc) -> {value,Line,I};
+expr({float,Line,F}, _Lc) -> {value,Line,F};
+expr({atom,Line,A}, _Lc) -> {value,Line,A};
+expr({string,Line,S}, _Lc) -> {value,Line,S};
+expr({nil,Line}, _Lc) -> {value,Line,[]};
+expr({cons,Line,H0,T0}, _Lc) ->
+    case {expr(H0, false),expr(T0, false)} of
 	{{value,Line,H1},{value,Line,T1}} -> {value,Line,[H1|T1]};
 	{H1,T1} -> {cons,Line,H1,T1}
     end;
-expr({tuple,Line,Es0}) ->
+expr({tuple,Line,Es0}, _Lc) ->
     Es1 = expr_list(Es0),
     {tuple,Line,Es1};
-expr({block,Line,Es0}) ->
+expr({block,Line,Es0}, Lc) ->
     %% Unfold block into a sequence.
-    Es1 = exprs(Es0),
+    Es1 = exprs(Es0, Lc),
     {block,Line,Es1};
-expr({'if',Line,Cs0}) ->
-    Cs1 = icr_clauses(Cs0),
+expr({'if',Line,Cs0}, Lc) ->
+    Cs1 = icr_clauses(Cs0, Lc),
     {'if',Line,Cs1};
-expr({'case',Line,E0,Cs0}) ->
-    E1 = expr(E0),
-    Cs1 = icr_clauses(Cs0),
+expr({'case',Line,E0,Cs0}, Lc) ->
+    E1 = expr(E0, false),
+    Cs1 = icr_clauses(Cs0, Lc),
     {'case',Line,E1,Cs1};
-expr({'receive',Line,Cs0}) ->
-    Cs1 = icr_clauses(Cs0),
+expr({'receive',Line,Cs0}, Lc) ->
+    Cs1 = icr_clauses(Cs0, Lc),
     {'receive',Line,Cs1};
-expr({'receive',Line,Cs0,To0,ToEs0}) ->
-    To1 = expr(To0),
-    ToEs1 = exprs(ToEs0),
-    Cs1 = icr_clauses(Cs0),
+expr({'receive',Line,Cs0,To0,ToEs0}, Lc) ->
+    To1 = expr(To0, false),
+    ToEs1 = exprs(ToEs0, Lc),
+    Cs1 = icr_clauses(Cs0, Lc),
     {'receive',Line,Cs1,To1,ToEs1};
-expr({'fun',Line,{clauses,Cs0},{_,_,Name}}) when is_atom(Name) ->
+expr({'fun',Line,{clauses,Cs0},{_,_,Name}}, _Lc) when is_atom(Name) ->
     %% New R10B-2 format (abstract_v2).
     Cs = fun_clauses(Cs0),
     {make_fun,Line,Name,Cs};
-expr({'fun',Line,{clauses,Cs0},{_,_,_,_,Name}}) when is_atom(Name) ->
-    %% New R8 format (abstract_v2).
-    Cs = fun_clauses(Cs0),
-    {make_fun,Line,Name,Cs};
-expr({'fun',Line,{function,F,A},{_Index,_OldUniq,Name}}) ->
+expr({'fun',Line,{function,F,A},{_Index,_OldUniq,Name}}, _Lc) ->
     %% New R8 format (abstract_v2).
     As = new_vars(A, Line),
-    Cs = [{clause,Line,As,[],[{local_call,Line,F,As}]}],
+    Cs = [{clause,Line,As,[],[{local_call,Line,F,As,true}]}],
     {make_fun,Line,Name,Cs};
-expr({'fun',_,{clauses,_},{_OldUniq,_Hvss,_Free}}) ->
-    %% Old format (abstract_v1).
-    exit({?MODULE,old_funs});
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,self}},[]}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,self}},[]}, _Lc) ->
     {dbg,Line,self,[]};
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,get_stacktrace}},[]}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,get_stacktrace}},[]}, _Lc) ->
     {dbg,Line,get_stacktrace,[]};
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,throw}},[_]=As}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,throw}},[_]=As}, _Lc) ->
     {dbg,Line,throw,expr_list(As)};
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,error}},[_]=As}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,error}},[_]=As}, _Lc) ->
     {dbg,Line,error,expr_list(As)};
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,fault}},[_]=As}) ->
-    {dbg,Line,fault,expr_list(As)};
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,exit}},[_]=As}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,exit}},[_]=As}, _Lc) ->
     {dbg,Line,exit,expr_list(As)};
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,apply}},[_,_,_]=As0}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,raise}},[_,_,_]=As}, _Lc) ->
+    {dbg,Line,raise,expr_list(As)};
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,apply}},[_,_,_]=As0}, Lc) ->
     As = expr_list(As0),
-    {apply,Line,As};
-expr({call,Line,{remote,_,{atom,_,Mod},{atom,_,Func}},As0}) ->
+    {apply,Line,As,Lc};
+expr({call,Line,{remote,_,{atom,_,Mod},{atom,_,Func}},As0}, Lc) ->
     As = expr_list(As0),
     case erlang:is_builtin(Mod, Func, length(As)) of
 	false ->
-	    {call_remote,Line,Mod,Func,As};
+	    {call_remote,Line,Mod,Func,As,Lc};
 	true ->
-	    case bif_type(Mod, Func) of
+	    case bif_type(Mod, Func, length(As0)) of
 		safe -> {safe_bif,Line,Mod,Func,As};
-		spawn -> {spawn_bif,Line,Mod,Func,As};
 		unsafe ->{bif,Line,Mod,Func,As}
 	    end
     end;
-expr({call,Line,{remote,_,Mod0,Func0},As0}) ->
+expr({call,Line,{remote,_,Mod0,Func0},As0}, Lc) ->
     %% New R8 format (abstract_v2).
-    Mod = expr(Mod0),
-    Func = expr(Func0),
+    Mod = expr(Mod0, false),
+    Func = expr(Func0, false),
     As = consify(expr_list(As0)),
-    {apply,Line,[Mod,Func,As]};
-expr({call,Line,{atom,_,Func},As0}) ->
+    {apply,Line,[Mod,Func,As],Lc};
+expr({call,Line,{atom,_,Func},As0}, Lc) ->
     As = expr_list(As0),
-    {local_call,Line,Func,As};
-expr({call,Line,Fun0,As0}) ->
-    Fun = expr(Fun0),
+    {local_call,Line,Func,As,Lc};
+expr({call,Line,Fun0,As0}, Lc) ->
+    Fun = expr(Fun0, false),
     As = expr_list(As0),
-    {apply_fun,Line,Fun,As};
-expr({'catch',Line,E0}) ->
+    {apply_fun,Line,Fun,As,Lc};
+expr({'catch',Line,E0}, _Lc) ->
     %% No new variables added.
-    E1 = expr(E0),
+    E1 = expr(E0, false),
     {'catch',Line,E1};
-expr({'try',Line,Es0,CaseCs0,CatchCs0,As0}) ->
+expr({'try',Line,Es0,CaseCs0,CatchCs0,As0}, Lc) ->
     %% No new variables added.
     Es = expr_list(Es0),
-    CaseCs = icr_clauses(CaseCs0),
-    CatchCs = icr_clauses(CatchCs0),
+    CaseCs = icr_clauses(CaseCs0, Lc),
+    CatchCs = icr_clauses(CatchCs0, Lc),
     As = expr_list(As0),
     {'try',Line,Es,CaseCs,CatchCs,As};
-expr({'query', Line, E0}) ->
-    E = expr(E0),
-    {'query', Line, E};
-expr({lc,Line,E0,Gs0}) ->			%R8.
+expr({lc,Line,E0,Gs0}, _Lc) ->			%R8.
     Gs = lists:map(fun ({generate,L,P0,Qs}) ->
-			   {generate,L,expr(P0),expr(Qs)};
+			   {generate,L,expr(P0, false),expr(Qs, false)};
 		       ({b_generate,L,P0,Qs}) -> %R12.
-			   {b_generate,L,expr(P0),expr(Qs)};
+			   {b_generate,L,expr(P0, false),expr(Qs, false)};
 		       (Expr) ->
-			   case is_guard_test(Expr) of
-			       true -> {guard,[[guard_test(Expr)]]};
-			       false -> expr(Expr)
+			   case is_guard(Expr) of
+			       true -> {guard,guard([[Expr]])};
+			       false -> expr(Expr, false)
 			   end
 		   end, Gs0),
-    {lc,Line,expr(E0),Gs};
-expr({bc,Line,E0,Gs0}) ->			%R12.
+    {lc,Line,expr(E0, false),Gs};
+expr({bc,Line,E0,Gs0}, _Lc) ->			%R12.
     Gs = lists:map(fun ({generate,L,P0,Qs}) ->
-			   {generate,L,expr(P0),expr(Qs)};
+			   {generate,L,expr(P0, false),expr(Qs, false)};
 		       ({b_generate,L,P0,Qs}) -> %R12.
-			   {b_generate,L,expr(P0),expr(Qs)};
+			   {b_generate,L,expr(P0, false),expr(Qs, false)};
 		       (Expr) ->
-			   case is_guard_test(Expr) of
-			       true -> {guard,[[guard_test(Expr)]]};
-			       false -> expr(Expr)
+			   case is_guard(Expr) of
+			       true -> {guard,guard([[Expr]])};
+			       false -> expr(Expr, false)
 			   end
 		   end, Gs0),
-    {bc,Line,expr(E0),Gs};
-expr({match,Line,P0,E0}) ->
-    E1 = expr(E0),
+    {bc,Line,expr(E0, false),Gs};
+expr({match,Line,P0,E0}, _Lc) ->
+    E1 = expr(E0, false),
     P1 = pattern(P0),
     {match,Line,P1,E1};
-expr({op,Line,Op,A0}) ->
-    A1 = expr(A0),
+expr({op,Line,Op,A0}, _Lc) ->
+    A1 = expr(A0, false),
     {op,Line,Op,[A1]};
-expr({op,Line,'++',L0,R0}) ->
-    L1 = expr(L0),
-    R1 = expr(R0),				%They see the same variables
+expr({op,Line,'++',L0,R0}, _Lc) ->
+    L1 = expr(L0, false),
+    R1 = expr(R0, false),		  %They see the same variables
     {op,Line,append,[L1,R1]};
-expr({op,Line,'--',L0,R0}) ->
-    L1 = expr(L0),
-    R1 = expr(R0),				%They see the same variables
+expr({op,Line,'--',L0,R0}, _Lc) ->
+    L1 = expr(L0, false),
+    R1 = expr(R0, false),		  %They see the same variables
     {op,Line,subtract,[L1,R1]};
-expr({op,Line,'!',L0,R0}) ->
-    L1 = expr(L0),
-    R1 = expr(R0),				%They see the same variables
+expr({op,Line,'!',L0,R0}, _Lc) ->
+    L1 = expr(L0, false),
+    R1 = expr(R0, false),		  %They see the same variables
     {send,Line,L1,R1};
-expr({op,Line,Op,L0,R0}) when Op =:= 'andalso'; Op =:= 'orelse' ->
-    L1 = expr(L0),
-    R1 = expr(R0),				%They see the same variables
+expr({op,Line,Op,L0,R0}, _Lc) when Op =:= 'andalso'; Op =:= 'orelse' ->
+    L1 = expr(L0, false),
+    R1 = expr(R0, false),		  %They see the same variables
     {Op,Line,L1,R1};
-expr({op,Line,Op,L0,R0}) ->
-    L1 = expr(L0),
-    R1 = expr(R0),				%They see the same variables
+expr({op,Line,Op,L0,R0}, _Lc) ->
+    L1 = expr(L0, false),
+    R1 = expr(R0, false),		  %They see the same variables
     {op,Line,Op,[L1,R1]};
-expr({bin,Line,Grp}) ->
+expr({bin,Line,Grp}, _Lc) ->
     Grp1 = expr_list(Grp),
     {bin,Line,Grp1};
-expr({bin_element,Line,Expr,Size,Type}) ->
-    Expr1 = expr(Expr),
-    Size1 = expr(Size),
+expr({bin_element,Line,Expr,Size,Type}, _Lc) ->
+    Expr1 = expr(Expr, false),
+    Size1 = expr(Size, false),
     {bin_element,Line,Expr1,Size1,Type};
-expr(Other) ->
+expr(Other, _Lc) ->
     exit({?MODULE,{unknown_expr,Other}}).
 
-%% is_guard_test(Expression) -> true | false.
-%%  Test if a general expression is a guard test.  Cannot use erl_lint
-%%  here as sys_pre_expand has transformed source.
+%% is_guard(Expression) -> true | false.
+%%  Test if a general expression is a guard test or guard BIF.
+%%  Cannot use erl_lint here as sys_pre_expand has transformed source.
 
-is_guard_test({op,_,Op,L,R}) ->
+is_guard({op,_,Op,L,R}) ->
     erl_internal:comp_op(Op, 2) andalso is_gexpr_list([L,R]);
-is_guard_test({call,_,{remote,_,{atom,_,erlang},{atom,_,Test}},As}) ->
-    erl_internal:type_test(Test, length(As)) andalso is_gexpr_list(As);
-is_guard_test({atom,_,true}) -> true;
-is_guard_test(_) -> false.
+is_guard({call,_,{remote,_,{atom,_,erlang},{atom,_,Test}},As}) ->
+    Arity = length(As),
+    (erl_internal:guard_bif(Test, Arity) orelse
+     erl_internal:old_type_test(Test, Arity)) andalso is_gexpr_list(As);
+is_guard({atom,_,true}) -> true;
+is_guard(_) -> false.
 
 is_gexpr({var,_,_}) -> true;
 is_gexpr({atom,_,_}) -> true;
@@ -555,17 +526,17 @@ consify([]) -> {value,0,[]}.
 %%  definition etc.
 
 expr_list([E0|Es]) ->
-    E1 = expr(E0),
+    E1 = expr(E0, false),
     [E1|expr_list(Es)];
 expr_list([]) -> [].
 
-icr_clauses([C0|Cs]) ->
-    C1 = clause(C0),
-    [C1|icr_clauses(Cs)];
-icr_clauses([]) -> [].
+icr_clauses([C0|Cs], Lc) ->
+    C1 = clause(C0, Lc),
+    [C1|icr_clauses(Cs, Lc)];
+icr_clauses([], _) -> [].
 
 fun_clauses([{clause,L,H,G,B}|Cs]) ->
-    [{clause,L,head(H),guard(G),exprs(B)}|fun_clauses(Cs)];
+    [{clause,L,head(H),guard(G),exprs(B, true)}|fun_clauses(Cs)];
 fun_clauses([]) -> [].
 
 %% new_var_name() -> VarName.
@@ -585,24 +556,21 @@ new_vars(N, L, Vs) when N > 0 ->
     new_vars(N-1, L, [V|Vs]);
 new_vars(0, _, Vs) -> Vs.
 
-bif_type(erlang, Name) -> bif_type(Name);
-bif_type(_, _) -> unsafe.
+bif_type(erlang, Name, Arity) ->
+    case erl_internal:guard_bif(Name, Arity) of
+	true ->
+	    %% Guard BIFs are safe (except for self/0, but it is
+	    %% handled with a special instruction anyway).
+	    safe;
+	false ->
+	    bif_type(Name)
+    end;
+bif_type(_, _, _) -> unsafe.
 
 bif_type(register)           -> safe;
 bif_type(unregister)         -> safe;
 bif_type(whereis)            -> safe;
 bif_type(registered)         -> safe;
-bif_type(abs)                -> safe;
-bif_type(float)              -> safe;
-bif_type(trunc)              -> safe;
-bif_type(round)              -> safe;
-bif_type(math)               -> safe;
-bif_type(node)               -> safe;
-bif_type(length)             -> safe;
-bif_type(hd)                 -> safe;
-bif_type(tl)                 -> safe;
-bif_type(size)               -> safe;
-bif_type(element)            -> safe;
 bif_type(setelement)         -> safe;
 bif_type(atom_to_list)       -> safe;
 bif_type(list_to_atom)       -> safe;
@@ -627,21 +595,14 @@ bif_type(list_to_pid)        -> safe;
 bif_type(module_loaded)      -> safe;
 bif_type(binary_to_term)     -> safe;
 bif_type(term_to_binary)     -> safe;
-bif_type(alive)              -> safe;
-bif_type(notalive)           -> safe;
 bif_type(nodes)              -> safe;
 bif_type(is_alive)           -> safe;
 bif_type(disconnect_node)    -> safe;
 bif_type(binary_to_list)     -> safe;
 bif_type(list_to_binary)     -> safe;
 bif_type(split_binary)       -> safe;
-bif_type(term_to_atom)       -> safe;
 bif_type(hash)               -> safe;
 bif_type(pre_loaded)         -> safe;
-bif_type(info)               -> safe;
 bif_type(set_cookie)         -> safe;
 bif_type(get_cookie)         -> safe;
-bif_type(spawn)              -> spawn;
-bif_type(spawn_link)         -> spawn;
-bif_type(spawn_opt)          -> spawn;
 bif_type(_)                  -> unsafe.
diff --git a/lib/debugger/src/dbg_iserver.erl b/lib/debugger/src/dbg_iserver.erl
index 212bc2b8ab..1bb73a43b9 100644
--- a/lib/debugger/src/dbg_iserver.erl
+++ b/lib/debugger/src/dbg_iserver.erl
@@ -97,13 +97,10 @@ ensure_started() ->
 %%
 %% Key                        Value
 %% ---                        -----
-%% attributes                 Attr
-%% exports                    Exp
 %% defs                       []
 %% mod_bin                    Binary
 %% mod_raw                    Raw Binary
 %% mod_file                   File
-%% module                     Mod
 %% {Mod,Name,Arity,Exported}  Cs
 %% {'fun',Mod,Index,Uniq}     {Name,Arity,Cs}
 %% Line                       {Pos,PosNL}
@@ -117,7 +114,7 @@ init([]) ->
     process_flag(trap_exit, true),
     global:register_name(?MODULE, self()),
     Db = ets:new(?MODULE, [ordered_set, protected]),
-    {ok, #state{db=Db, auto=false, stack=all}}.
+    {ok, #state{db=Db, auto=false, stack=no_tail}}.
 
 %% Attaching to a process
 handle_call({attached, AttPid, Pid}, _From, State) ->
diff --git a/lib/debugger/src/dbg_istk.erl b/lib/debugger/src/dbg_istk.erl
new file mode 100644
index 0000000000..c6922a80e4
--- /dev/null
+++ b/lib/debugger/src/dbg_istk.erl
@@ -0,0 +1,245 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2011. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(dbg_istk).
+-export([init/0,delayed_to_external/0,from_external/1,
+	 push/3,pop/0,pop/1,stack_level/0,
+	 delayed_stacktrace/0,delayed_stacktrace/2,
+	 bindings/1,stack_frame/2,backtrace/2,
+	 in_use_p/2]).
+
+-include("dbg_ieval.hrl").
+
+-define(STACK, ?MODULE).
+
+-record(e,
+	{level,					%Level
+	 mfa,					%{Mod,Func,Args|Arity}|{Fun,Args}
+	 line,					%Line called from
+	 bindings,
+	 lc					%Last call (true|false)
+	 }).
+
+init() ->
+    init([]).
+
+delayed_to_external() ->
+    Stack = get(?STACK),
+    fun() -> {stack,term_to_binary(Stack)} end.
+
+from_external({stack,Stk}) ->
+    put(?STACK, binary_to_term(Stk)).
+
+init(Stack) ->
+    put(?STACK, Stack).
+
+%% We keep track of a call stack that is used for
+%%  1) saving stack frames that can be inspected from an Attached
+%%     Process GUI (using dbg_icmd:get(Meta, stack_frame, {Dir, SP})
+%%  2) generate an approximation of regular stacktrace -- sent to
+%%     Debugged when it should raise an exception or evaluate a
+%%     function (since it might possible raise an exception)
+%%
+%% How to push depends on the "Stack Trace" option (value saved in
+%% process dictionary item 'trace_stack').
+%%   all - everything is pushed
+%%   no_tail - tail recursive push
+%%   false - nothing is pushed
+%% Whenever a function returns, the corresponding call frame is popped.
+
+push(Bs, #ieval{level=Le,module=Mod,function=Name,
+		arguments=As,line=Li}=Ieval, Lc) ->
+    Entry = #e{level=Le,mfa={Mod,Name,As},line=Li,bindings=Bs,lc=Lc},
+    case get(trace_stack) of
+	false ->
+	    Ieval#ieval{level=Le+1};
+	no_tail when Lc ->
+	    Ieval;
+	_ -> % all | no_tail when Lc =:= false
+	    put(?STACK, [Entry|get(?STACK)]),
+	    Ieval#ieval{level=Le+1}
+    end.
+
+pop() ->
+    case get(trace_stack) of
+	false -> ignore;
+	_ -> % all ¦ no_tail
+	    case get(?STACK) of
+		[_Entry|Entries] ->
+		    put(?STACK, Entries);
+		[] ->
+		    ignore
+	    end
+    end.
+
+pop(Le) ->
+    case get(trace_stack) of
+	false -> ignore;
+	_ -> % all | no_tail
+	    put(?STACK, pop(Le, get(?STACK)))
+    end.
+
+pop(Level, [#e{level=Le}|Stack]) when Level =< Le ->
+    pop(Level, Stack);
+pop(_Level, Stack) ->
+    Stack.
+
+%% stack_level() -> Le
+%% stack_level(Stack) -> Le
+%% Top call level
+stack_level() ->
+    stack_level(get(?STACK)).
+
+stack_level([]) -> 1;
+stack_level([#e{level=Le}|_]) -> Le.
+
+%% delayed_stacktrace() -> CreateStacktraceFun
+%% delayed_stacktrace(ArgFlag, #ieval{}) -> CreateStacktraceFun
+%%   ArgFlag = no_args | include_args
+%%   CreateStacktraceFun = fun(NumberOfEntries)
+%%
+%% Return a fun that can convert the internal stack format to
+%% an imitation of the regular stacktrace.
+
+delayed_stacktrace() ->
+    Stack0 = get(?STACK),
+    fun(NumEntries) ->
+	    Stack = stacktrace(NumEntries, Stack0, []),
+	    [finalize(ArityOnly) || {ArityOnly,_} <- Stack]
+    end.
+
+delayed_stacktrace(include_args, Ieval) ->
+    #ieval{module=Mod,function=Name,arguments=As,line=Li} = Ieval,
+    Stack0 = [#e{mfa={Mod,Name,As},line=Li}|get(?STACK)],
+    fun(NumEntries) ->
+	    case stacktrace(NumEntries, Stack0, []) of
+		[] ->
+		    [];
+		[{_,WithArgs}|Stack] ->
+		    [finalize(WithArgs) |
+		     [finalize(ArityOnly) || {ArityOnly,_} <- Stack]]
+	    end
+    end;
+delayed_stacktrace(no_args, Ieval) ->
+    #ieval{module=Mod,function=Name,arguments=As,line=Li} = Ieval,
+    Stack0 = [#e{mfa={Mod,Name,As},line=Li}|get(?STACK)],
+    fun(NumEntries) ->
+	    Stack = stacktrace(NumEntries, Stack0, []),
+	    [finalize(ArityOnly) || {ArityOnly,_} <- Stack]
+    end.
+
+stacktrace(N, [#e{lc=true}|T], Acc) ->
+    stacktrace(N, T, Acc);
+stacktrace(N, [E|T], []) ->
+    stacktrace(N-1, T, [normalize(E)]);
+stacktrace(N, [E|T], [{P,_}|_]=Acc) when N > 0 ->
+    case normalize(E) of
+	{P,_} ->
+	    stacktrace(N, T, Acc);
+	New ->
+	    stacktrace(N-1, T, [New|Acc])
+    end;
+stacktrace(_, _, Acc) ->
+    lists:reverse(Acc).
+
+normalize(#e{mfa={M,Fun,As},line=Li}) when is_function(Fun) ->
+    Loc = {M,Li},
+    {{Fun,length(As),Loc},{Fun,As,Loc}};
+normalize(#e{mfa={M,F,As},line=Li}) ->
+    Loc = {M,Li},
+    {{M,F,length(As),Loc},{M,F,As,Loc}}.
+
+finalize({M,F,A,Loc}) -> {M,F,A,line(Loc)};
+finalize({Fun,A,Loc}) -> {Fun,A,line(Loc)}.
+
+line({Mod,Line}) when Line > 0 ->
+    [{file,atom_to_list(Mod)++".erl"},{line,Line}];
+line(_) -> [].
+
+%% bindings(SP) -> Bs
+%%   SP = Le  % stack pointer
+%% Return the bindings for the specified call level
+bindings(SP) ->
+    bindings(SP, get(?STACK)).
+
+bindings(SP, [#e{level=SP,bindings=Bs}|_]) ->
+    Bs;
+bindings(SP, [_Entry|Entries]) ->
+    bindings(SP, Entries);
+bindings(_SP, []) ->
+    erl_eval:new_bindings().
+
+%% stack_frame(Dir, SP) -> {Le, Where, Bs} | top | bottom
+%%   Dir = up | down
+%%   Where = {Cm, Li}
+%%     Cm = Module | undefined  % module
+%%     Li = int()  | -1         % line number
+%%     Bs = bindings()
+%% Return stack frame info one step up/down from given stack pointer
+%%  up = to lower call levels
+%%  down = to higher call levels
+stack_frame(up, SP) ->
+    stack_frame(SP, up, get(?STACK));
+stack_frame(down, SP) ->
+    stack_frame(SP, down, lists:reverse(get(?STACK))).
+
+stack_frame(SP, up, [#e{level=Le,mfa={Cm,_,_},line=Li,bindings=Bs}|_])
+  when Le < SP ->
+    {Le,{Cm,Li},Bs};
+stack_frame(SP, down, [#e{level=Le,mfa={Cm,_,_},line=Li,bindings=Bs}|_])
+  when Le > SP ->
+    {Le,{Cm,Li},Bs};
+stack_frame(SP, Dir, [#e{level=SP}|Stack]) ->
+    case Stack of
+	[#e{level=Le,mfa={Cm,_,_},line=Li,bindings=Bs}|_] ->
+	    {Le,{Cm,Li},Bs};
+	[] when Dir =:= up ->
+	    top;
+	[] when Dir =:= down ->
+	    bottom
+    end;
+stack_frame(SP, Dir, [_Entry|Stack]) ->
+    stack_frame(SP, Dir, Stack).
+
+%% backtrace(HowMany) -> Backtrace
+%%   HowMany = all | int()
+%%   Backtrace = {Le, MFA}
+%% Return all/the last N called functions, in reversed call order
+backtrace(HowMany, Ieval) ->
+    #ieval{level=Level,module=Mod,function=Name,arguments=As} = Ieval,
+    Stack0 = [#e{level=Level,mfa={Mod,Name,As}}|get(?STACK)],
+    Stack = case HowMany of
+		all -> Stack0;
+		N -> lists:sublist(Stack0, N)
+	    end,
+    [{Le,MFA} || #e{level=Le,mfa=MFA} <- Stack].
+
+%%--------------------------------------------------------------------
+%% in_use_p(Mod, Cm) -> boolean()
+%%   Mod = Cm = atom()
+%% Returns true if Mod is found on the stack, otherwise false.
+%%--------------------------------------------------------------------
+in_use_p(Mod, Mod) -> true;
+in_use_p(Mod, _Cm) ->
+    case get(trace_stack) of
+	false -> true;
+	_ -> %  all | no_tail
+	    lists:any(fun(#e{mfa={M,_,_}}) when M =:= Mod -> true;
+			 (_) -> false
+		      end, get(?STACK))
+    end.
diff --git a/lib/debugger/src/debugger.app.src b/lib/debugger/src/debugger.app.src
index 21cf59a2e1..5538f66260 100644
--- a/lib/debugger/src/debugger.app.src
+++ b/lib/debugger/src/debugger.app.src
@@ -26,6 +26,7 @@
 	     dbg_ieval,
 	     dbg_iload,
 	     dbg_iserver,
+	     dbg_istk,
 	     dbg_ui_break,
 	     dbg_ui_break_win,
 	     dbg_ui_edit,
diff --git a/lib/debugger/test/Makefile b/lib/debugger/test/Makefile
index 2296bd0ae6..3dfbed31ff 100644
--- a/lib/debugger/test/Makefile
+++ b/lib/debugger/test/Makefile
@@ -43,6 +43,7 @@ MODULES= \
 	exception_SUITE \
 	fun_SUITE \
 	lc_SUITE \
+	line_number_SUITE \
 	record_SUITE \
 	trycatch_SUITE \
 	test_lib \
diff --git a/lib/debugger/test/bs_construct_SUITE.erl b/lib/debugger/test/bs_construct_SUITE.erl
index 5c7d49e951..187c9f53b0 100644
--- a/lib/debugger/test/bs_construct_SUITE.erl
+++ b/lib/debugger/test/bs_construct_SUITE.erl
@@ -19,18 +19,31 @@
 
 -module(bs_construct_SUITE).
 
+%% Copied from bs_construct_SUITE in the emulator test suite.
+%% The following test cases have been omitted since they don't
+%% make much sense for the debugger:
+%%  bs_add
+%%  kostis
+
 -export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
 	 init_per_testcase/2,end_per_testcase/2,
 	 init_per_suite/1,end_per_suite/1,
-	 test1/1, test2/1, test3/1, test4/1, test5/1, testf/1, not_used/1, in_guard/1,
-	 coerce_to_float/1]).
+	 test1/1, test2/1, test3/1, test4/1, test5/1, testf/1,
+	 not_used/1, in_guard/1,
+	 mem_leak/1, coerce_to_float/1, bjorn/1,
+	 huge_float_field/1, huge_binary/1, system_limit/1, badarg/1,
+	 copy_writable_binary/1, dynamic/1,
+	 otp_7422/1, zero_width/1]).
 
 -include_lib("test_server/include/test_server.hrl").
 
 suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
-    cases().
+    [test1, test2, test3, test4, test5, testf, not_used,
+     in_guard, mem_leak, coerce_to_float, bjorn,
+     huge_float_field, huge_binary, system_limit, badarg,
+     copy_writable_binary, dynamic, otp_7422, zero_width].
 
 groups() -> 
     [].
@@ -41,11 +54,6 @@ init_per_group(_GroupName, Config) ->
 end_per_group(_GroupName, Config) ->
     Config.
 
-
-cases() -> 
-    [test1, test2, test3, test4, test5, testf, not_used,
-     in_guard, coerce_to_float].
-
 init_per_testcase(_Case, Config) ->
     test_lib:interpret(?MODULE),
     Dog = test_server:timetrap(?t:minutes(1)),
@@ -75,7 +83,9 @@ r(L) ->
 -define(T(B, L), {B, ??B, L}).
 -define(N(B), {B, ??B, unknown}).
 
--define(FAIL(Expr), ?line {'EXIT',{badarg,_}} = (catch Expr)).
+-define(FAIL(Expr), ?line fail_check(catch Expr, ??Expr, [])).
+
+-define(FAIL_VARS(Expr, Vars), ?line fail_check(catch Expr, ??Expr, Vars)).
 
 l(I_13, I_big1) ->
     [
@@ -143,7 +153,13 @@ l(I_13, I_big1) ->
 	native_3798()),
 
      ?T(<<32978297842987249827298387697777669766334937:128/native-integer>>,
-	native_bignum())
+	native_bignum()),
+
+     %% Unit tests.
+     ?T(<<<<5:3>>/bitstring>>, <<5:3>>),
+     ?T(<<42,<<7:4>>/binary-unit:4>>, <<42,7:4>>),
+     ?T(<<<<344:17>>/binary-unit:17>>, <<344:17>>),
+     ?T(<<<<42,3,7656:16>>/binary-unit:16>>, <<42,3,7656:16>>)
 
      ].
 
@@ -179,7 +195,7 @@ eval_list([{C_bin, Str, Bytes} | Rest], Vars) ->
 	    [{C_bin, E_bin, Str, Bytes} | eval_list(Rest, Vars)]
     end.
 
-one_test({C_bin, E_bin, Str, Bytes}) when list(Bytes) ->
+one_test({C_bin, E_bin, Str, Bytes}) when is_list(Bytes) ->
     io:format("  ~s, ~p~n", [Str, Bytes]),
     Bin = list_to_binary(Bytes),
     if
@@ -222,7 +238,7 @@ one_test({C_bin, E_bin, Str, Result}) ->
 		    ok;
 		%% For situations where the final bits may not matter, like
 		%% for floats:
-		N when integer(N) ->
+		N when is_integer(N) ->
 		    io:format("Info: compiled and interpreted differ in the"
 			      " last bytes:~n ~p, ~p.~n",
 			      [binary_to_list(C_bin), binary_to_list(E_bin)]),
@@ -248,9 +264,22 @@ equal_lists(A, B, R) ->
 	    false
     end.
 
+fail_check({'EXIT',{badarg,_}}, Str, Vars) ->
+    try	evaluate(Str, Vars) of
+	Res ->
+	    io:format("Interpreted result: ~p", [Res]),
+	    ?t:fail(did_not_fail_in_intepreted_code)
+    catch
+	error:badarg ->
+	    ok
+    end;
+fail_check(Res, _, _) ->
+    io:format("Compiled result: ~p", [Res]),
+    ?t:fail(did_not_fail_in_compiled_code).
+
 %%% Simple working cases
 test1(suite) -> [];
-test1(Config) when list(Config) ->
+test1(Config) when is_list(Config) ->
     ?line I_13 = i(13),
     ?line I_big1 = big(1),
     ?line Vars = [{'I_13', I_13},
@@ -272,7 +301,7 @@ gen_l(N, S, A) ->
     [?T(<<A:S/little, A:(N-S)/little>>, comp(N, A, S))].
 
 test2(suite) -> [];
-test2(Config) when list(Config) ->
+test2(Config) when is_list(Config) ->
     ?line test2(0, 8, 2#10101010101010101),
     ?line test2(0, 8, 2#1111111111).
 
@@ -300,7 +329,7 @@ t3() ->
     ].
 
 test3(suite) -> [];
-test3(Config) when list(Config) ->
+test3(Config) when is_list(Config) ->
     ?line Vars = [],
     ?line lists:foreach(fun one_test/1, eval_list(t3(), Vars)).
 
@@ -311,7 +340,7 @@ gen_u_l(N, S, A) ->
     [?N(<<A:S/little, A:(N-S)/little>>)].
 
 test4(suite) -> [];
-test4(Config) when list(Config) ->
+test4(Config) when is_list(Config) ->
     ?line test4(0, 16, 2#10101010101010101),
     ?line test4(0, 16, 2#1111111111).
 
@@ -333,7 +362,7 @@ gen_b(N, S, A) ->
 
 test5(suite) -> [];
 test5(doc) -> ["OTP-3995"];
-test5(Config) when list(Config) ->
+test5(Config) when is_list(Config) ->
     ?line test5(0, 8, <<73>>),
     ?line test5(0, 8, <<68>>).
 
@@ -350,40 +379,63 @@ test5(S, A) ->
 
 %%% Failure cases
 testf(suite) -> [];
-testf(Config) when list(Config) ->
-    ?FAIL(<<3.14>>),
-    ?FAIL(<<<<1,2>>>>),
-
-    ?FAIL(<<2.71/binary>>),
-    ?FAIL(<<24334/binary>>),
-    ?FAIL(<<24334344294788947129487129487219847/binary>>),
-
-    ?FAIL(<<<<1,2,3>>/float>>),
+testf(Config) when is_list(Config) ->
+    ?line ?FAIL(<<3.14>>),
+    ?line ?FAIL(<<<<1,2>>>>),
+
+    ?line ?FAIL(<<2.71/binary>>),
+    ?line ?FAIL(<<24334/binary>>),
+    ?line ?FAIL(<<24334344294788947129487129487219847/binary>>),
+    BigInt = id(24334344294788947129487129487219847),
+    ?line ?FAIL_VARS(<<BigInt/binary>>, [{'BigInt',BigInt}]),
+    ?line ?FAIL_VARS(<<42,BigInt/binary>>, [{'BigInt',BigInt}]),
+    ?line ?FAIL_VARS(<<BigInt:2/binary>>, [{'BigInt',BigInt}]),
+
+    %% One negative field size, but the sum of field sizes will be 1 byte.
+    %% Make sure that we reject that properly.
+    I_minus_777 = id(-777),
+    I_minus_2047 = id(-2047),
+    ?line ?FAIL_VARS(<<I_minus_777:2048/unit:8,57:I_minus_2047/unit:8>>,
+		     ordsets:from_list([{'I_minus_777',I_minus_777},
+					{'I_minus_2047',I_minus_2047}])),
+    ?line ?FAIL(<<<<1,2,3>>/float>>),
 
     %% Negative field widths.
-    testf_1(-8, <<1,2,3,4,5>>),
-
-    ?FAIL(<<42:(-16)>>),
-    ?FAIL(<<3.14:(-8)/float>>),
-    ?FAIL(<<<<23,56,0,2>>:(-16)/binary>>),
-    ?FAIL(<<<<23,56,0,2>>:(2.5)/binary>>),
-    ?FAIL(<<<<23,56,0,2>>:(anka)>>),
+    ?line testf_1(-8, <<1,2,3,4,5>>),
+    ?line ?FAIL(<<0:(-(1 bsl 100))>>),
+
+    ?line ?FAIL(<<42:(-16)>>),
+    ?line ?FAIL(<<3.14:(-8)/float>>),
+    ?line ?FAIL(<<<<23,56,0,2>>:(-16)/binary>>),
+    ?line ?FAIL(<<<<23,56,0,2>>:(2.5)/binary>>),
+    ?line ?FAIL(<<<<23,56,0,2>>:(anka)>>),
+    ?line ?FAIL(<<<<23,56,0,2>>:(anka)>>),
+
+    %% Unit failures.
+    ?line ?FAIL(<<<<1:1>>/binary>>),
+    Sz = id(1),
+    ?line ?FAIL_VARS(<<<<1:Sz>>/binary>>, [{'Sz',Sz}]),
+    ?line {'EXIT',{badarg,_}} = (catch <<<<1:(id(1))>>/binary>>),
+    ?line ?FAIL(<<<<7,8,9>>/binary-unit:16>>),
+    ?line ?FAIL(<<<<7,8,9,3:7>>/binary-unit:16>>),
+    ?line ?FAIL(<<<<7,8,9,3:7>>/binary-unit:17>>),
 
     ok.
 
 testf_1(W, B) ->
-    ?FAIL(<<42:W>>),
-    ?FAIL(<<3.14:W/float>>),
-    ?FAIL(<<B:W/binary>>).
+    Vars = [{'W',W}],
+    ?FAIL_VARS(<<42:W>>, Vars),
+    ?FAIL_VARS(<<3.14:W/float>>, Vars),
+    ?FAIL_VARS(<<B:W/binary>>, [{'B',B}|Vars]).
 
 not_used(doc) ->
     "Test that constructed binaries that are not used will still give an exception.";
 not_used(Config) when is_list(Config) ->
     ?line ok = not_used1(3, <<"dum">>),
-    ?line ?FAIL(not_used1(3, "dum")),
-    ?line ?FAIL(not_used2(444, -2)),
-    ?line ?FAIL(not_used2(444, anka)),
-    ?line ?FAIL(not_used3(444)),
+    ?line {'EXIT',{badarg,_}} = (catch not_used1(3, "dum")),
+    ?line {'EXIT',{badarg,_}} = (catch not_used2(444, -2)),
+    ?line {'EXIT',{badarg,_}} = (catch not_used2(444, anka)),
+    ?line {'EXIT',{badarg,_}} = (catch not_used3(444)),
     ok.
 
 not_used1(I, BinString) ->
@@ -398,7 +450,7 @@ not_used3(I) ->
     <<I:(-8)>>,
     ok.
 
-in_guard(Config) when list(Config) ->
+in_guard(Config) when is_list(Config) ->
     ?line 1 = in_guard(<<16#74ad:16>>, 16#e95, 5),
     ?line 2 = in_guard(<<16#3A,16#F7,"hello">>, 16#3AF7, <<"hello">>),
     ?line 3 = in_guard(<<16#FBCD:14,3.1415/float,3:2>>, 16#FBCD, 3.1415),
@@ -415,6 +467,36 @@ in_guard(Bin, A, B) when <<A:14,B/float,3:2>> == Bin -> 3;
 in_guard(Bin, A, B) when {a,b,<<A:14,B/float,3:2>>} == Bin -> cant_happen;
 in_guard(_, _, _) -> nope.
 
+mem_leak(doc) -> "Make sure that construction has no memory leak";
+mem_leak(Config) when is_list(Config) ->
+    ?line B = make_bin(16, <<0>>),
+    ?line mem_leak(1024, B),
+    ok.
+
+mem_leak(0, _) -> ok;
+mem_leak(N, B) ->
+    ?line big_bin(B, <<23>>),
+    ?line {'EXIT',{badarg,_}} = (catch big_bin(B, bad)),
+    maybe_gc(),
+    mem_leak(N-1, B).
+
+big_bin(B1, B2) ->
+    <<B1/binary,B1/binary,B1/binary,B1/binary,
+      B1/binary,B1/binary,B1/binary,B1/binary,
+      B1/binary,B1/binary,B1/binary,B1/binary,
+      B1/binary,B1/binary,B1/binary,B1/binary,
+      B2/binary>>.
+
+make_bin(0, Acc) -> Acc;
+make_bin(N, Acc) -> make_bin(N-1, <<Acc/binary,Acc/binary>>).
+
+maybe_gc() ->
+    case erlang:system_info(heap_type) of
+	shared -> erlang:garbage_collect();
+	hybrid -> erlang:garbage_collect();
+	private -> ok
+    end.
+
 -define(COF(Int0),
 	?line (fun(Int) ->
 		       true = <<Int:32/float>> =:= <<(float(Int)):32/float>>,
@@ -431,7 +513,7 @@ in_guard(_, _, _) -> nope.
 
 nonliteral(X) -> X.
 
-coerce_to_float(Config) when list(Config) ->
+coerce_to_float(Config) when is_list(Config) ->
     ?COF(0),
     ?COF(-1),
     ?COF(1),
@@ -444,3 +526,232 @@ coerce_to_float(Config) when list(Config) ->
     ?COF64(298748888888888888888888888883478264866528467367364766666666666666663),
     ?COF64(-367546729879999999999947826486652846736736476555566666663),
     ok.
+
+bjorn(Config) when is_list(Config) ->
+    ?line error = bjorn_1(),
+    ok.
+
+bjorn_1() ->
+    Bitstr = <<7:13>>,
+    try
+	do_something()
+    catch
+	throw:blurf ->
+	    ignore
+    end,
+    do_more(Bitstr, 13).
+
+do_more(Bin, Sz) ->
+    %% Previous bug in the bs_bits_to_bytes instruction: The exeption code
+    %% was not set - the previous exception (throw:blurf) would be used,
+    %% causing the catch to slip.
+    try <<Bin:Sz/binary>> of
+	_V -> ok
+    catch
+	error:_ ->
+	    error
+    end.
+
+do_something() ->
+    throw(blurf).
+
+huge_float_field(Config) when is_list(Config) ->
+    ?line {'EXIT',{badarg,_}} = (catch <<0.0:9/float-unit:8>>),
+    ?line huge_float_check(catch <<0.0:67108865/float-unit:64>>),
+    ?line huge_float_check(catch <<0.0:((1 bsl 26)+1)/float-unit:64>>),
+    ?line huge_float_check(catch <<0.0:(id(67108865))/float-unit:64>>),
+%%  ?line huge_float_check(catch <<0.0:((1 bsl 60)+1)/float-unit:64>>),
+    ?line huge_float_check(catch <<3839739387439387383739387987347983:((1 bsl 26)+1)/float-unit:64>>),
+%%  ?line huge_float_check(catch <<3839739387439387383739387987347983:((1 bsl 60)+1)/float-unit:64>>),
+    ok.
+
+huge_float_check({'EXIT',{system_limit,_}}) -> ok;
+huge_float_check({'EXIT',{badarg,_}}) -> ok.
+
+huge_binary(Config) when is_list(Config) ->
+    ?line 16777216 = size(<<0:(id(1 bsl 26)),(-1):(id(1 bsl 26))>>),
+    ok.
+
+system_limit(Config) when is_list(Config) ->
+    WordSize = erlang:system_info(wordsize),
+    BitsPerWord = WordSize * 8,
+    ?line {'EXIT',{system_limit,_}} =
+	(catch <<0:(id(0)),42:(id(1 bsl BitsPerWord))>>),
+    ?line {'EXIT',{system_limit,_}} =
+	(catch <<42:(id(1 bsl BitsPerWord)),0:(id(0))>>),
+    ?line {'EXIT',{system_limit,_}} =
+	(catch <<(id(<<>>))/binary,0:(id(1 bsl 100))>>),
+
+    case WordSize of
+	4 ->
+	    system_limit_32();
+	8 ->
+	    ok
+    end.
+
+system_limit_32() ->
+    ?line {'EXIT',{badarg,_}} = (catch <<42:(-1)>>),
+    ?line {'EXIT',{badarg,_}} = (catch <<42:(id(-1))>>),
+    ?line {'EXIT',{badarg,_}} = (catch <<42:(id(-389739873536870912))/unit:8>>),
+    ?line {'EXIT',{system_limit,_}} = (catch <<42:536870912/unit:8>>),
+    ?line {'EXIT',{system_limit,_}} = (catch <<42:(id(536870912))/unit:8>>),
+    ?line {'EXIT',{system_limit,_}} = (catch <<0:(id(8)),42:536870912/unit:8>>),
+    ?line {'EXIT',{system_limit,_}} =
+	(catch <<0:(id(8)),42:(id(536870912))/unit:8>>),
+    ok.
+
+badarg(Config) when is_list(Config) ->
+    %% BEAM will generate a badarg exception for:
+    %%   <<0:(id(1 bsl 100)),0:(id(-1))>>
+    %% but the debugger will generate a system_limit exception.
+    %% It does not seems worthwhile to fix the debugger.
+
+    ?line {'EXIT',{badarg,_}} =
+	(catch <<(id(<<>>))/binary,0:(id(-(1 bsl 100)))>>),
+
+    ok.
+
+copy_writable_binary(Config) when is_list(Config) ->
+    ?line [copy_writable_binary_1(I) || I <- lists:seq(0, 256)],
+    ok.
+
+copy_writable_binary_1(_) ->
+    ?line Bin0 = <<(id(<<>>))/binary,0,1,2,3,4,5,6,7>>,
+    ?line SubBin = make_sub_bin(Bin0),
+    ?line id(<<42,34,55,Bin0/binary>>),		%Make reallocation likelier.
+    ?line Pid = spawn(fun() ->
+			      copy_writable_binary_holder(Bin0, SubBin)
+		      end),
+    ?line Tab = ets:new(holder, []),
+    ?line ets:insert(Tab, {17,Bin0}),
+    ?line ets:insert(Tab, {42,SubBin}),
+    ?line id(<<Bin0/binary,0:(64*1024*8)>>),
+    ?line Pid ! self(),
+    ?line [{17,Bin0}] = ets:lookup(Tab, 17),
+    ?line [{42,Bin0}] = ets:lookup(Tab, 42),
+    receive
+	{Pid,Bin0,Bin0} -> ok;
+	Other ->
+	    io:format("Unexpected message: ~p", [Other]),
+	    ?line ?t:fail()
+    end,
+    ok.
+
+copy_writable_binary_holder(Bin, SubBin) ->
+    receive
+	Pid ->
+	    Pid ! {self(),Bin,SubBin}
+    end.
+
+make_sub_bin(Bin0) ->
+    N = bit_size(Bin0),
+    <<_:17,Bin:N/bitstring,_:5>> = <<(-1):17,Bin0/bitstring,(-1):5>>,
+    Bin = Bin0,					%Assertion.
+    Bin.
+
+%% Test that different ways of using bit syntax instructions
+%% give the same result.
+
+dynamic(Config) when is_list(Config) ->
+    ?line dynamic_1(fun dynamic_big/5),
+    ?line dynamic_1(fun dynamic_little/5),
+    ok.
+
+dynamic_1(Dynamic) ->
+    <<Lpad:128>> = erlang:md5([0]),
+    <<Rpad:128>> = erlang:md5([1]),
+    <<Int:128>> = erlang:md5([2]),
+    8385 = dynamic_2(0, {Int,Lpad,Rpad,Dynamic}, 0).
+
+dynamic_2(129, _, Count) -> Count;
+dynamic_2(Bef, Data, Count0) ->
+    Count = dynamic_3(Bef, 128-Bef, Data, Count0),
+    dynamic_2(Bef+1, Data, Count).
+
+dynamic_3(_, -1, _, Count) -> Count;
+dynamic_3(Bef, N, {Int0,Lpad,Rpad,Dynamic}=Data, Count) ->
+    Int1 = Int0 band ((1 bsl (N+3))-1),
+    Dynamic(Bef, N, Int1, Lpad, Rpad),
+    Dynamic(Bef, N, -Int1, Lpad, Rpad),
+
+    %% OTP-7085: Test a small number in a wide field.
+    Int2 = Int0 band 16#FFFFFF,
+    Dynamic(Bef, N, Int2, Lpad, Rpad),
+    Dynamic(Bef, N, -Int2, Lpad, Rpad),
+    dynamic_3(Bef, N-1, Data, Count+1).
+
+dynamic_big(Bef, N, Int, Lpad, Rpad) ->
+    NumBin = id(<<Int:N>>),
+    MaskedInt = Int band ((1 bsl N) - 1),
+    <<MaskedInt:N>> = NumBin,
+
+    %% Construct the binary in two different ways.
+    Bin = id(<<Lpad:Bef,NumBin/bitstring,Rpad:(128-Bef-N)>>),
+    Bin = <<Lpad:Bef,Int:N,Rpad:(128-Bef-N)>>,
+
+    %% Further verify the result by matching.
+    LpadMasked = Lpad band ((1 bsl Bef) - 1),
+    RpadMasked = Rpad band ((1 bsl (128-Bef-N)) - 1),
+    Rbits = (128-Bef-N),
+    <<LpadMasked:Bef,MaskedInt:N,RpadMasked:Rbits>> = id(Bin),
+    ok.
+
+dynamic_little(Bef, N, Int, Lpad, Rpad) ->
+    NumBin = id(<<Int:N/little>>),
+    MaskedInt = Int band ((1 bsl N) - 1),
+    <<MaskedInt:N/little>> = NumBin,
+
+    %% Construct the binary in two different ways.
+    Bin = id(<<Lpad:Bef/little,NumBin/bitstring,Rpad:(128-Bef-N)/little>>),
+    Bin = <<Lpad:Bef/little,Int:N/little,Rpad:(128-Bef-N)/little>>,
+
+    %% Further verify the result by matching.
+    LpadMasked = Lpad band ((1 bsl Bef) - 1),
+    RpadMasked = Rpad band ((1 bsl (128-Bef-N)) - 1),
+    Rbits = (128-Bef-N),
+    <<LpadMasked:Bef/little,MaskedInt:N/little,RpadMasked:Rbits/little>> = id(Bin),
+    ok.
+
+otp_7422(Config) when is_list(Config) ->
+    otp_7422_int(0),
+    otp_7422_bin(0).
+
+otp_7422_int(N) when N < 512 ->
+    T = erlang:make_tuple(N, []),
+    spawn_link(fun() ->
+		       id(T),
+		       %% A size of field 0 would write one byte beyond
+		       %% the current position in the binary. It could
+		       %% overwrite the continuation pointer stored on
+		       %% the stack if HTOP was equal to E (the stack pointer).
+		       id(<<0:(id(0))>>)
+	       end),
+    otp_7422_int(N+1);
+otp_7422_int(_) -> ok.
+
+otp_7422_bin(N) when N < 512 ->
+    T = erlang:make_tuple(N, []),
+    Z = id(<<>>),
+    spawn_link(fun() ->
+		       id(T),
+		       id(<<Z:(id(0))/bits>>)
+	       end),
+    otp_7422_bin(N+1);
+otp_7422_bin(_) -> ok.
+
+zero_width(Config) when is_list(Config) ->
+    ?line Z = id(0),
+    Small = id(42),
+    Big = id(1 bsl 128),
+    ?line <<>> = <<Small:Z>>,
+    ?line <<>> = <<Small:0>>,
+    ?line <<>> = <<Big:Z>>,
+    ?line <<>> = <<Big:0>>,
+
+    ?line {'EXIT',{badarg,_}} = (catch <<not_a_number:0>>),
+    ?line {'EXIT',{badarg,_}} = (catch <<(id(not_a_number)):Z>>),
+    ?line {'EXIT',{badarg,_}} = (catch <<(id(not_a_number)):0>>),
+
+    ok.
+
+id(I) -> I.
diff --git a/lib/debugger/test/bs_match_bin_SUITE.erl b/lib/debugger/test/bs_match_bin_SUITE.erl
index b42b84aef2..5a7c30f16b 100644
--- a/lib/debugger/test/bs_match_bin_SUITE.erl
+++ b/lib/debugger/test/bs_match_bin_SUITE.erl
@@ -24,14 +24,14 @@
 -export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
 	 init_per_testcase/2,end_per_testcase/2,
 	 init_per_suite/1,end_per_suite/1,
-	 byte_split_binary/1,bit_split_binary/1]).
+	 byte_split_binary/1,bit_split_binary/1,match_huge_bin/1]).
 
 -include_lib("test_server/include/test_server.hrl").
 
 suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
-    cases().
+    [byte_split_binary, bit_split_binary, match_huge_bin].
 
 groups() -> 
     [].
@@ -42,10 +42,6 @@ init_per_group(_GroupName, Config) ->
 end_per_group(_GroupName, Config) ->
     Config.
 
-
-cases() -> 
-    [byte_split_binary, bit_split_binary].
-
 init_per_testcase(_Case, Config) ->
     test_lib:interpret(?MODULE),
     Dog = test_server:timetrap(?t:minutes(1)),
@@ -65,11 +61,12 @@ end_per_suite(Config) when is_list(Config) ->
     ok.
 
 byte_split_binary(doc) -> "Tries to split a binary at all byte-aligned positions.";
-byte_split_binary(suite) -> [];
-byte_split_binary(Config) when list(Config) ->
+byte_split_binary(Config) when is_list(Config) ->
     ?line L = lists:seq(0, 57),
     ?line B = mkbin(L),
-    ?line byte_split(L, B, size(B)).
+    ?line byte_split(L, B, size(B)),
+    ?line Unaligned = make_unaligned_sub_binary(B),
+    ?line byte_split(L, Unaligned, size(Unaligned)).
 
 byte_split(L, B, Pos) when Pos >= 0 ->
     ?line Sz1 = Pos,
@@ -78,18 +75,19 @@ byte_split(L, B, Pos) when Pos >= 0 ->
     ?line B1 = list_to_binary(lists:sublist(L, 1, Pos)),
     ?line B2 = list_to_binary(lists:nthtail(Pos, L)),
     ?line byte_split(L, B, Pos-1);
-byte_split(_L, _B, _) -> ok.
+byte_split(_, _, _) -> ok.
 
 bit_split_binary(doc) -> "Tries to split a binary at all positions.";
-bit_split_binary(suite) -> [];
-bit_split_binary(Config) when list(Config) ->
+bit_split_binary(Config) when is_list(Config) ->
     Fun = fun(Bin, List, SkipBef, N) ->
 		  ?line SkipAft = 8*size(Bin) - N - SkipBef,
-		  io:format("~p, ~p, ~p", [SkipBef,N,SkipAft]),
-		  ?line <<_I1:SkipBef,OutBin:N/binary-unit:1,_I2:SkipAft>> = Bin,
+		  %%io:format("~p, ~p, ~p", [SkipBef,N,SkipAft]),
+		  ?line <<_:SkipBef,OutBin:N/binary-unit:1,_:SkipAft>> = Bin,
 		  ?line OutBin = make_bin_from_list(List, N)
 	  end,
     ?line bit_split_binary1(Fun, erlang:md5(<<1,2,3>>)),
+    ?line bit_split_binary1(Fun,
+			    make_unaligned_sub_binary(erlang:md5(<<1,2,3>>))),
     ok.
 
 bit_split_binary1(Action, Bin) ->
@@ -99,24 +97,23 @@ bit_split_binary1(Action, Bin) ->
 bit_split_binary2(Action, Bin, [_|T]=List, Bef) ->
     bit_split_binary3(Action, Bin, List, Bef, size(Bin)*8),
     bit_split_binary2(Action, Bin, T, Bef+1);
-bit_split_binary2(_Action, _Bin, [], _Bef) -> ok.
+bit_split_binary2(_, _, [], _) -> ok.
 
 bit_split_binary3(Action, Bin, List, Bef, Aft) when Bef =< Aft ->
     Action(Bin, List, Bef, (Aft-Bef) div 8 * 8),
     bit_split_binary3(Action, Bin, List, Bef, Aft-8);
 bit_split_binary3(_, _, _, _, _) -> ok.
 
-make_bin_from_list(_List, 0) ->
-    mkbin([]);
+make_bin_from_list(_, 0) -> mkbin([]);
 make_bin_from_list(List, N) ->
     list_to_binary([make_int(List, 8, 0),
 		    make_bin_from_list(lists:nthtail(8, List), N-8)]).
 
 
-make_int(_List, 0, Acc) -> Acc;
+make_int(_, 0, Acc) -> Acc;
 make_int([H|T], N, Acc) -> make_int(T, N-1, Acc bsl 1 bor H).
 
-bits_to_list([_H|T], 0) -> bits_to_list(T, 16#80);
+bits_to_list([_|T], 0) -> bits_to_list(T, 16#80);
 bits_to_list([H|_]=List, Mask) ->
     [case H band Mask of
 	 0 -> 0;
@@ -124,5 +121,109 @@ bits_to_list([H|_]=List, Mask) ->
      end|bits_to_list(List, Mask bsr 1)];
 bits_to_list([], _) -> [].
 
+mkbin(L) when is_list(L) -> list_to_binary(L).
+
+make_unaligned_sub_binary(Bin0) ->
+    Bin1 = <<0:3,Bin0/binary,31:5>>,
+    Sz = size(Bin0),
+    <<0:3,Bin:Sz/binary,31:5>> = id(Bin1),
+    Bin.
+
+id(I) -> I.
+
+match_huge_bin(Config) when is_list(Config) ->
+    ?line Bin = <<0:(1 bsl 27),13:8>>,
+    ?line skip_huge_bin_1(1 bsl 27, Bin),
+    ?line 16777216 = match_huge_bin_1(1 bsl 27, Bin),
+
+    %% Test overflowing the size of a binary field.
+    ?line nomatch = overflow_huge_bin_skip_32(Bin),
+    ?line nomatch = overflow_huge_bin_32(Bin),
+    ?line nomatch = overflow_huge_bin_skip_64(Bin),
+    ?line nomatch = overflow_huge_bin_64(Bin),
+
+    %% Size in variable
+    ?line ok = overflow_huge_bin(Bin, lists:seq(25, 32)++lists:seq(50, 64)),
+    ?line ok = overflow_huge_bin_unit128(Bin, lists:seq(25, 32)++lists:seq(50, 64)),
+
+    ok.
+
+overflow_huge_bin(Bin, [Sz0|Sizes]) ->
+    Sz = id(1 bsl Sz0),
+    case Bin of
+	<<_:Sz/binary-unit:8,0,_/binary>> ->
+	    {error,Sz};
+	_ ->
+	    case Bin of
+		<<NewBin:Sz/binary-unit:8,0,_/binary>> ->
+		    {error,Sz,size(NewBin)};
+		_ ->
+		    overflow_huge_bin(Bin, Sizes)
+	    end
+    end;
+overflow_huge_bin(_, []) -> ok.
+
+overflow_huge_bin_unit128(Bin, [Sz0|Sizes]) ->
+    Sz = id(1 bsl Sz0),
+    case Bin of
+	<<_:Sz/binary-unit:128,0,_/binary>> ->
+	    {error,Sz};
+	_ ->
+	    case Bin of
+		<<NewBin:Sz/binary-unit:128,0,_/binary>> ->
+		    {error,Sz,size(NewBin)};
+		_ ->
+		    overflow_huge_bin_unit128(Bin, Sizes)
+	    end
+    end;
+overflow_huge_bin_unit128(_, []) -> ok.
+
+skip_huge_bin_1(I, Bin) ->
+    <<_:I/binary-unit:1,13>> = Bin,
+    ok.
 
-mkbin(L) when list(L) -> list_to_binary(L).
+match_huge_bin_1(I, Bin) ->
+    case Bin of
+	<<Val:I/binary-unit:1,13>> -> size(Val);
+	_ -> nomatch
+    end.
+
+overflow_huge_bin_skip_32(<<_:4294967296/binary,0,_/binary>>) -> 1; % 1 bsl 32
+overflow_huge_bin_skip_32(<<_:33554432/binary-unit:128,0,_/binary>>) -> 2; % 1 bsl 25
+overflow_huge_bin_skip_32(<<_:67108864/binary-unit:64,0,_/binary>>) -> 3; % 1 bsl 26
+overflow_huge_bin_skip_32(<<_:134217728/binary-unit:32,0,_/binary>>) -> 4; % 1 bsl 27
+overflow_huge_bin_skip_32(<<_:268435456/binary-unit:16,0,_/binary>>) -> 5; % 1 bsl 28
+overflow_huge_bin_skip_32(<<_:536870912/binary-unit:8,0,_/binary>>) -> 6; % 1 bsl 29
+overflow_huge_bin_skip_32(<<_:1073741824/binary-unit:8,0,_/binary>>) -> 7; % 1 bsl 30
+overflow_huge_bin_skip_32(<<_:2147483648/binary-unit:8,0,_/binary>>) -> 8; % 1 bsl 31
+overflow_huge_bin_skip_32(_) -> nomatch.
+
+overflow_huge_bin_32(<<Bin:4294967296/binary,_/binary>>) -> {1,Bin}; % 1 bsl 32
+overflow_huge_bin_32(<<Bin:33554432/binary-unit:128,0,_/binary>>) -> {2,Bin}; % 1 bsl 25
+overflow_huge_bin_32(<<Bin:67108864/binary-unit:128,0,_/binary>>) -> {3,Bin}; % 1 bsl 26
+overflow_huge_bin_32(<<Bin:134217728/binary-unit:128,0,_/binary>>) -> {4,Bin}; % 1 bsl 27
+overflow_huge_bin_32(<<Bin:268435456/binary-unit:128,0,_/binary>>) -> {5,Bin}; % 1 bsl 28
+overflow_huge_bin_32(<<Bin:536870912/binary-unit:128,0,_/binary>>) -> {6,Bin}; % 1 bsl 29
+overflow_huge_bin_32(<<Bin:1073741824/binary-unit:128,0,_/binary>>) -> {7,Bin}; % 1 bsl 30
+overflow_huge_bin_32(<<Bin:2147483648/binary-unit:128,0,_/binary>>) -> {8,Bin}; % 1 bsl 31
+overflow_huge_bin_32(_) -> nomatch.
+
+overflow_huge_bin_skip_64(<<_:18446744073709551616/binary,0,_/binary>>) -> 1; % 1 bsl 64
+overflow_huge_bin_skip_64(<<_:144115188075855872/binary-unit:128,0,_/binary>>) -> 2; % 1 bsl 57
+overflow_huge_bin_skip_64(<<_:288230376151711744/binary-unit:64,0,_/binary>>) -> 3; % 1 bsl 58
+overflow_huge_bin_skip_64(<<_:576460752303423488/binary-unit:32,0,_/binary>>) -> 4; % 1 bsl 59
+overflow_huge_bin_skip_64(<<_:1152921504606846976/binary-unit:16,0,_/binary>>) -> 5; % 1 bsl 60
+overflow_huge_bin_skip_64(<<_:2305843009213693952/binary-unit:8,0,_/binary>>) -> 6; % 1 bsl 61
+overflow_huge_bin_skip_64(<<_:4611686018427387904/binary-unit:8,0,_/binary>>) -> 7; % 1 bsl 62
+overflow_huge_bin_skip_64(<<_:9223372036854775808/binary-unit:8,_/binary>>) -> 8; % 1 bsl 63
+overflow_huge_bin_skip_64(_) -> nomatch.
+
+overflow_huge_bin_64(<<Bin:18446744073709551616/binary,_/binary>>) -> {1,Bin}; % 1 bsl 64
+overflow_huge_bin_64(<<Bin:144115188075855872/binary-unit:128,0,_/binary>>) -> {2,Bin}; % 1 bsl 57
+overflow_huge_bin_64(<<Bin:288230376151711744/binary-unit:128,0,_/binary>>) -> {3,Bin}; % 1 bsl 58
+overflow_huge_bin_64(<<Bin:576460752303423488/binary-unit:128,0,_/binary>>) -> {4,Bin}; % 1 bsl 59
+overflow_huge_bin_64(<<Bin:1152921504606846976/binary-unit:128,0,_/binary>>) -> {5,Bin}; % 1 bsl 60
+overflow_huge_bin_64(<<Bin:2305843009213693952/binary-unit:128,0,_/binary>>) -> {6,Bin}; % 1 bsl 61
+overflow_huge_bin_64(<<Bin:4611686018427387904/binary-unit:128,0,_/binary>>) -> {7,Bin}; % 1 bsl 62
+overflow_huge_bin_64(<<Bin:9223372036854775808/binary-unit:128,0,_/binary>>) -> {8,Bin}; % 1 bsl 63
+overflow_huge_bin_64(_) -> nomatch.
diff --git a/lib/debugger/test/bs_match_int_SUITE.erl b/lib/debugger/test/bs_match_int_SUITE.erl
index 745368fdfc..bff5f8ff65 100644
--- a/lib/debugger/test/bs_match_int_SUITE.erl
+++ b/lib/debugger/test/bs_match_int_SUITE.erl
@@ -19,11 +19,11 @@
 
 -module(bs_match_int_SUITE).
 
--author('[email protected]').
 -export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
 	 init_per_testcase/2,end_per_testcase/2,
 	 init_per_suite/1,end_per_suite/1,
-	 integer/1,signed_integer/1,dynamic/1,more_dynamic/1,mml/1]).
+	 integer/1,signed_integer/1,dynamic/1,more_dynamic/1,mml/1,
+	 match_huge_int/1,bignum/1,unaligned_32_bit/1]).
 
 -include_lib("test_server/include/test_server.hrl").
 
@@ -32,7 +32,8 @@
 suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
-    [cases()].
+    [integer, signed_integer, dynamic, more_dynamic, mml,
+     match_huge_int, bignum, unaligned_32_bit].
 
 groups() -> 
     [].
@@ -43,10 +44,6 @@ init_per_group(_GroupName, Config) ->
 end_per_group(_GroupName, Config) ->
     Config.
 
-
-cases() -> 
-    [integer, signed_integer, dynamic, more_dynamic, mml].
-
 init_per_testcase(_Case, Config) ->
     test_lib:interpret(?MODULE),
     Dog = test_server:timetrap(?t:minutes(4)),
@@ -65,8 +62,7 @@ init_per_suite(Config) when is_list(Config) ->
 end_per_suite(Config) when is_list(Config) ->
     ok.
 
-integer(suite) -> [];
-integer(Config) when list(Config) ->
+integer(Config) when is_list(Config) ->
     ?line 0 = get_int(mkbin([])),
     ?line 0 = get_int(mkbin([0])),
     ?line 42 = get_int(mkbin([42])),
@@ -78,22 +74,33 @@ integer(Config) when list(Config) ->
     ?line 65534 = get_int(mkbin([255,254])),
     ?line 16776455 = get_int(mkbin([255,253,7])),
     ?line 4245492555 = get_int(mkbin([253,13,19,75])),
+    ?line 4294967294 = get_int(mkbin([255,255,255,254])),
+    ?line 4294967295 = get_int(mkbin([255,255,255,255])),
     ?line Eight = [200,1,19,128,222,42,97,111],
     ?line cmp128(Eight, uint(Eight)),
     ?line fun_clause(catch get_int(mkbin(seq(1,5)))),
     ok.
 
-get_int(<<I:0>>) -> I;
-get_int(<<I:8>>) -> I;
-get_int(<<I:16>>) -> I;
-get_int(<<I:24>>) -> I;
-get_int(<<I:32>>) -> I.
+get_int(Bin) ->
+    I = get_int1(Bin),
+    get_int(Bin, I).
+
+get_int(Bin0, I) when size(Bin0) < 4 ->
+    Bin = <<0,Bin0/binary>>,
+    I = get_int1(Bin),
+    get_int(Bin, I);
+get_int(_, I) -> I.
+
+get_int1(<<I:0>>) -> I;
+get_int1(<<I:8>>) -> I;
+get_int1(<<I:16>>) -> I;
+get_int1(<<I:24>>) -> I;
+get_int1(<<I:32>>) -> I.
 
 cmp128(<<I:128>>, I) -> equal;
-cmp128(_B, _I) -> not_equal.
+cmp128(_, _) -> not_equal.
 
-signed_integer(suite) -> [];
-signed_integer(Config) when list(Config) ->
+signed_integer(Config) when is_list(Config) ->
     ?line {no_match,_} = sint(mkbin([])),
     ?line {no_match,_} = sint(mkbin([1,2,3])),
     ?line 127 = sint(mkbin([127])),
@@ -113,7 +120,7 @@ uint(L) -> uint(L, 0).
 uint([H|T], Acc) -> uint(T, Acc bsl 8 bor H);
 uint([], Acc) -> Acc.
 
-dynamic(Config) when list(Config) ->
+dynamic(Config) when is_list(Config) ->
     dynamic(mkbin([255]), 8),
     dynamic(mkbin([255,255]), 16),
     dynamic(mkbin([255,255,255]), 24),
@@ -124,7 +131,7 @@ dynamic(Bin, S1) when S1 >= 0 ->
     S2 = size(Bin) * 8 - S1,
     dynamic(Bin, S1, S2, (1 bsl S1) - 1, (1 bsl S2) - 1),
     dynamic(Bin, S1-1);
-dynamic(_Bin, _) -> ok.
+dynamic(_, _) -> ok.
 
 dynamic(Bin, S1, S2, A, B) ->
 %    io:format("~p ~p ~p ~p\n", [S1,S2,A,B]),
@@ -132,25 +139,24 @@ dynamic(Bin, S1, S2, A, B) ->
 	<<A:S1,B:S2>> ->
 	    io:format("~p ~p ~p ~p\n", [S1,S2,A,B]),
 	    ok;
-	_Other ->
-	    erlang:error(badmatch, [Bin,S1,S2,A,B])
+	_Other -> erlang:error(badmatch, [Bin,S1,S2,A,B])
     end.
 
 more_dynamic(doc) -> "Extract integers at different alignments and of different sizes.";
-more_dynamic(Config) when list(Config) ->
+more_dynamic(Config) when is_list(Config) ->
 
     % Unsigned big-endian numbers.
     Unsigned  = fun(Bin, List, SkipBef, N) ->
 			SkipAft = 8*size(Bin) - N - SkipBef,
-			<<_I1:SkipBef,Int:N,_I2:SkipAft>> = Bin,
+			<<_:SkipBef,Int:N,_:SkipAft>> = Bin,
 			Int = make_int(List, N, 0)
 		end,
     ?line more_dynamic1(Unsigned, funny_binary(42)),
 
-    % Signed big-endian numbers.
+    %% Signed big-endian numbers.
     Signed  = fun(Bin, List, SkipBef, N) ->
 		      SkipAft = 8*size(Bin) - N - SkipBef,
-		      <<_I1:SkipBef,Int:N/signed,_I2:SkipAft>> = Bin,
+		      <<_:SkipBef,Int:N/signed,_:SkipAft>> = Bin,
 		      case make_signed_int(List, N) of
 			  Int -> ok;
 			  Other ->
@@ -162,18 +168,18 @@ more_dynamic(Config) when list(Config) ->
 	      end,
     ?line more_dynamic1(Signed, funny_binary(43)),
 
-    % Unsigned little-endian numbers.
+    %% Unsigned little-endian numbers.
     UnsLittle  = fun(Bin, List, SkipBef, N) ->
 			 SkipAft = 8*size(Bin) - N - SkipBef,
-			 <<_I1:SkipBef,Int:N/little,_I2:SkipAft>> = Bin,
+			 <<_:SkipBef,Int:N/little,_:SkipAft>> = Bin,
 			 Int = make_int(big_to_little(List, N), N, 0)
 		 end,
     ?line more_dynamic1(UnsLittle, funny_binary(44)),
 
-    % Signed little-endian numbers.
+    %% Signed little-endian numbers.
     SignLittle  = fun(Bin, List, SkipBef, N) ->
 			  SkipAft = 8*size(Bin) - N - SkipBef,
-			  <<_I1:SkipBef,Int:N/signed-little,_I2:SkipAft>> = Bin,
+			  <<_:SkipBef,Int:N/signed-little,_:SkipAft>> = Bin,
 			  Little = big_to_little(List, N),
 			  Int = make_signed_int(Little, N)
 		  end,
@@ -181,11 +187,6 @@ more_dynamic(Config) when list(Config) ->
 
     ok.
 
-funny_binary(N) ->
-    B0 = erlang:md5([N]),
-    {B1,_B2} = split_binary(B0, size(B0) div 2),
-    B1.
-
 more_dynamic1(Action, Bin) ->
     BitList = bits_to_list(binary_to_list(Bin), 16#80),
     more_dynamic2(Action, Bin, BitList, 0).
@@ -193,7 +194,7 @@ more_dynamic1(Action, Bin) ->
 more_dynamic2(Action, Bin, [_|T]=List, Bef) ->
     more_dynamic3(Action, Bin, List, Bef, size(Bin)*8),
     more_dynamic2(Action, Bin, T, Bef+1);
-more_dynamic2(_Action, _Bin, [], _Bef) -> ok.
+more_dynamic2(_, _, [], _) -> ok.
 
 more_dynamic3(Action, Bin, List, Bef, Aft) when Bef =< Aft ->
 %%    io:format("~p, ~p", [Bef,Aft-Bef]),
@@ -208,8 +209,8 @@ big_to_little([B0,B1,B2,B3,B4,B5,B6,B7|T], N, Acc) when N >= 8 ->
 big_to_little(List, N, Acc) -> lists:sublist(List, 1, N) ++ Acc.
 
 make_signed_int(_List, 0) -> 0;
-make_signed_int([0|_T]=List, N) -> make_int(List, N, 0);
-make_signed_int([1|_T]=List0, N) ->
+make_signed_int([0|_]=List, N) -> make_int(List, N, 0);
+make_signed_int([1|_]=List0, N) ->
     List1 = reversed_sublist(List0, N, []),
     List2 = two_complement_and_reverse(List1, 1, []),
     -make_int(List2, length(List2), 0).
@@ -225,7 +226,7 @@ two_complement_and_reverse([], Carry, Acc) -> [Carry|Acc].
 make_int(_List, 0, Acc) -> Acc;
 make_int([H|T], N, Acc) -> make_int(T, N-1, Acc bsl 1 bor H).
 
-bits_to_list([_H|T], 0) -> bits_to_list(T, 16#80);
+bits_to_list([_|T], 0) -> bits_to_list(T, 16#80);
 bits_to_list([H|_]=List, Mask) ->
     [case H band Mask of
 	 0 -> 0;
@@ -234,11 +235,134 @@ bits_to_list([H|_]=List, Mask) ->
 bits_to_list([], _) -> [].
 
 fun_clause({'EXIT',{function_clause,_}}) -> ok.
-mkbin(L) when list(L) -> list_to_binary(L).
+mkbin(L) when is_list(L) -> list_to_binary(L).
+
+funny_binary(N) ->
+    B0 = erlang:md5([N]),
+    {B1,_B2} = split_binary(B0, byte_size(B0) div 3),
+    B1.
 
-mml(Config) when list(Config) ->
+mml(Config) when is_list(Config) ->
     ?line single_byte_binary = mml_choose(<<42>>),
     ?line multi_byte_binary = mml_choose(<<42,43>>).
 
 mml_choose(<<_A:8>>) -> single_byte_binary;
-mml_choose(<<_A:8, _T/binary>>) -> multi_byte_binary.
+mml_choose(<<_A:8,_T/binary>>) -> multi_byte_binary.
+
+match_huge_int(Config) when is_list(Config) ->
+    Sz = 1 bsl 27,
+    ?line Bin = <<0:Sz,13:8>>,
+    ?line skip_huge_int_1(Sz, Bin),
+    ?line 0 = match_huge_int_1(Sz, Bin),
+
+    %% Test overflowing the size of an integer field.
+    ?line nomatch = overflow_huge_int_skip_32(Bin),
+    case erlang:system_info(wordsize) of
+	4 ->
+	    ?line nomatch = overflow_huge_int_32(Bin);
+	8 ->
+	    %% An attempt will be made to allocate heap space for
+	    %% the bignum (which will probably fail); only if the
+	    %% allocation succeds will the matching fail because
+	    %% the binary is too small.
+	    ok
+    end,
+    ?line nomatch = overflow_huge_int_skip_64(Bin),
+    ?line nomatch = overflow_huge_int_64(Bin),
+
+    %% Test overflowing the size of an integer field using variables as sizes.
+    ?line Sizes = case erlang:system_info(wordsize) of
+		      4 -> lists:seq(25, 32);
+		      8 -> []
+		  end ++ lists:seq(50, 64),
+    ?line ok = overflow_huge_int_unit128(Bin, Sizes),
+
+    ok.
+
+overflow_huge_int_unit128(Bin, [Sz0|Sizes]) ->
+    Sz = id(1 bsl Sz0),
+    case Bin of
+	<<_:Sz/unit:128,0,_/binary>> ->
+	    {error,Sz};
+	_ ->
+	    case Bin of
+		<<Var:Sz/unit:128,0,_/binary>> ->
+		    {error,Sz,Var};
+		_ ->
+		    overflow_huge_int_unit128(Bin, Sizes)
+	    end
+    end;
+overflow_huge_int_unit128(_, []) -> ok.
+
+match_huge_int_1(I, Bin) ->
+    <<Int:I,13>> = Bin,
+    Int.
+
+skip_huge_int_1(I, Bin) ->
+    <<_:I,13>> = Bin.
+
+overflow_huge_int_skip_32(<<_:4294967296,0,_/binary>>) -> 1; % 1 bsl 32
+overflow_huge_int_skip_32(<<_:33554432/unit:128,0,_/binary>>) -> 2; % 1 bsl 25
+overflow_huge_int_skip_32(<<_:67108864/unit:64,0,_/binary>>) -> 3; % 1 bsl 26
+overflow_huge_int_skip_32(<<_:134217728/unit:32,0,_/binary>>) -> 4; % 1 bsl 27
+overflow_huge_int_skip_32(<<_:268435456/unit:16,0,_/binary>>) -> 5; % 1 bsl 28
+overflow_huge_int_skip_32(<<_:536870912/unit:8,0,_/binary>>) -> 6; % 1 bsl 29
+overflow_huge_int_skip_32(<<_:1073741824/unit:8,0,_/binary>>) -> 7; % 1 bsl 30
+overflow_huge_int_skip_32(<<_:2147483648/unit:8,0,_/binary>>) -> 8; % 1 bsl 31
+overflow_huge_int_skip_32(_) -> nomatch.
+
+overflow_huge_int_32(<<Int:4294967296,_/binary>>) -> {1,Int}; % 1 bsl 32
+overflow_huge_int_32(<<Int:33554432/unit:128,0,_/binary>>) -> {2,Int}; % 1 bsl 25
+overflow_huge_int_32(<<Int:67108864/unit:128,0,_/binary>>) -> {3,Int}; % 1 bsl 26
+overflow_huge_int_32(<<Int:134217728/unit:128,0,_/binary>>) -> {4,Int}; % 1 bsl 27
+overflow_huge_int_32(<<Int:268435456/unit:128,0,_/binary>>) -> {5,Int}; % 1 bsl 28
+overflow_huge_int_32(<<Int:536870912/unit:128,0,_/binary>>) -> {6,Int}; % 1 bsl 29
+overflow_huge_int_32(<<Int:1073741824/unit:128,0,_/binary>>) -> {7,Int}; % 1 bsl 30
+overflow_huge_int_32(<<Int:2147483648/unit:128,0,_/binary>>) -> {8,Int}; % 1 bsl 31
+overflow_huge_int_32(_) -> nomatch.
+
+overflow_huge_int_skip_64(<<_:18446744073709551616,_/binary>>) -> 1; % 1 bsl 64
+overflow_huge_int_skip_64(<<_:144115188075855872/unit:128,0,_/binary>>) -> 2; % 1 bsl 57
+overflow_huge_int_skip_64(<<_:288230376151711744/unit:64,0,_/binary>>) -> 3; % 1 bsl 58
+overflow_huge_int_skip_64(<<_:576460752303423488/unit:32,0,_/binary>>) -> 4; % 1 bsl 59
+overflow_huge_int_skip_64(<<_:1152921504606846976/unit:16,0,_/binary>>) -> 5; % 1 bsl 60
+overflow_huge_int_skip_64(<<_:2305843009213693952/unit:8,0,_/binary>>) -> 6; % 1 bsl 61
+overflow_huge_int_skip_64(<<_:4611686018427387904/unit:8,0,_/binary>>) -> 7; % 1 bsl 62
+overflow_huge_int_skip_64(<<_:9223372036854775808/unit:8,0,_/binary>>) -> 8; % 1 bsl 63
+overflow_huge_int_skip_64(_) -> nomatch.
+
+overflow_huge_int_64(<<Int:18446744073709551616,_/binary>>) -> {1,Int}; % 1 bsl 64
+overflow_huge_int_64(<<Int:144115188075855872/unit:128,0,_/binary>>) -> {2,Int}; % 1 bsl 57
+overflow_huge_int_64(<<Int:288230376151711744/unit:128,0,_/binary>>) -> {3,Int}; % 1 bsl 58
+overflow_huge_int_64(<<Int:576460752303423488/unit:128,0,_/binary>>) -> {4,Int}; % 1 bsl 59
+overflow_huge_int_64(<<Int:1152921504606846976/unit:128,0,_/binary>>) -> {5,Int}; % 1 bsl 60
+overflow_huge_int_64(<<Int:2305843009213693952/unit:128,0,_/binary>>) -> {6,Int}; % 1 bsl 61
+overflow_huge_int_64(<<Int:4611686018427387904/unit:128,0,_/binary>>) -> {7,Int}; % 1 bsl 62
+overflow_huge_int_64(<<Int:9223372036854775808/unit:128,0,_/binary>>) -> {8,Int}; % 1 bsl 63
+overflow_huge_int_64(_) -> nomatch.
+
+bignum(Config) when is_list(Config) ->
+    ?line Bin = id(<<42,0:1024/unit:8,43>>),
+    ?line <<42:1025/little-integer-unit:8,_:8>> = Bin,
+    ?line <<_:8,43:1025/integer-unit:8>> = Bin,
+
+    ?line BignumBin = id(<<0:512/unit:8,258254417031933722623:9/unit:8>>),
+    ?line <<258254417031933722623:(512+9)/unit:8>> = BignumBin,
+    erlang:garbage_collect(),			%Search for holes in debug-build.
+    ok.
+
+unaligned_32_bit(Config) when is_list(Config) ->
+    %% There used to be a risk for heap overflow (fixed in R11B-5).
+    ?line L = unaligned_32_bit_1(<<-1:(64*1024)>>),
+    ?line unaligned_32_bit_verify(L, 1638).
+
+unaligned_32_bit_1(<<1:1,U:32,_:7,T/binary>>) ->
+    [U|unaligned_32_bit_1(T)];
+unaligned_32_bit_1(_) ->
+    [].
+
+unaligned_32_bit_verify([], 0) -> ok;
+unaligned_32_bit_verify([4294967295|T], N) when N > 0 ->
+    unaligned_32_bit_verify(T, N-1).
+
+id(I) -> I.
diff --git a/lib/debugger/test/bs_match_misc_SUITE.erl b/lib/debugger/test/bs_match_misc_SUITE.erl
index 53d11ba179..89fce263f5 100644
--- a/lib/debugger/test/bs_match_misc_SUITE.erl
+++ b/lib/debugger/test/bs_match_misc_SUITE.erl
@@ -19,18 +19,24 @@
 
 -module(bs_match_misc_SUITE).
 
--author('[email protected]').
 -export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
 	 init_per_testcase/2,end_per_testcase/2,
 	 init_per_suite/1,end_per_suite/1,
-	 bound_var/1,bound_tail/1,t_float/1,little_float/1,sean/1]).
+	 bound_var/1,bound_tail/1,t_float/1,little_float/1,sean/1,
+	 kenneth/1,encode_binary/1,native/1,happi/1,
+	 size_var/1,wiger/1,x0_context/1,huge_float_field/1,
+	 writable_binary_matched/1,otp_7198/1,
+	 unordered_bindings/1]).
 
 -include_lib("test_server/include/test_server.hrl").
 
 suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
-    cases().
+    [bound_var, bound_tail, t_float, little_float, sean,
+     kenneth, encode_binary, native, happi, size_var, wiger,
+     x0_context, huge_float_field, writable_binary_matched,
+     otp_7198, unordered_bindings].
 
 groups() -> 
     [].
@@ -41,9 +47,13 @@ init_per_group(_GroupName, Config) ->
 end_per_group(_GroupName, Config) ->
     Config.
 
+init_per_suite(Config) when is_list(Config) ->
+    ?line test_lib:interpret(?MODULE),
+    ?line true = lists:member(?MODULE, int:interpreted()),
+    Config.
 
-cases() -> 
-    [bound_var, bound_tail, t_float, little_float, sean].
+end_per_suite(Config) when is_list(Config) ->
+    ok.
 
 init_per_testcase(_Case, Config) ->
     test_lib:interpret(?MODULE),
@@ -55,16 +65,8 @@ end_per_testcase(_Case, Config) ->
     ?t:timetrap_cancel(Dog),
     ok.
 
-init_per_suite(Config) when is_list(Config) ->
-    ?line test_lib:interpret(?MODULE),
-    ?line true = lists:member(?MODULE, int:interpreted()),
-    Config.
-
-end_per_suite(Config) when is_list(Config) ->
-    ok.
-
 bound_var(doc) -> "Test matching of bound variables.";
-bound_var(Config) when list(Config) ->
+bound_var(Config) when is_list(Config) ->
     ?line ok = bound_var(42, 13, <<42,13>>),
     ?line nope = bound_var(42, 13, <<42,255>>),
     ?line nope = bound_var(42, 13, <<154,255>>),
@@ -74,7 +76,7 @@ bound_var(A, B, <<A:8,B:8>>) -> ok;
 bound_var(_, _, _) -> nope.
 
 bound_tail(doc) -> "Test matching of a bound tail.";
-bound_tail(Config) when list(Config) ->
+bound_tail(Config) when is_list(Config) ->
     ?line ok = bound_tail(<<>>, <<13,14>>),
     ?line ok = bound_tail(<<2,3>>, <<1,1,2,3>>),
     ?line nope = bound_tail(<<2,3>>, <<1,1,2,7>>),
@@ -85,7 +87,7 @@ bound_tail(Config) when list(Config) ->
 bound_tail(T, <<_:16,T/binary>>) -> ok;
 bound_tail(_, _) -> nope.
 
-t_float(Config) when list(Config) ->
+t_float(Config) when is_list(Config) ->
     F = f1(),
     G = f_one(),
 
@@ -98,6 +100,10 @@ t_float(Config) when list(Config) ->
     ?line fcmp(F, match_float(<<1:1,F:64/float,127:7>>, 64, 1)),
     ?line fcmp(F, match_float(<<1:13,F:32/float,127:3>>, 32, 13)),
     ?line fcmp(F, match_float(<<1:13,F:64/float,127:3>>, 64, 13)),
+
+    ?line {'EXIT',{{badmatch,_},_}} = (catch match_float(<<0,0>>, 16, 0)),
+    ?line {'EXIT',{{badmatch,_},_}} = (catch match_float(<<0,0>>, 16#7fffffff, 0)),
+
     ok.
 
 
@@ -110,7 +116,7 @@ match_float(Bin0, Fsz, I) ->
     <<_:I,F:Fsz/float,_:Tsz>> = Bin,
     F.
 
-little_float(Config) when list(Config) ->
+little_float(Config) when is_list(Config) ->
     F = f2(),
     G = f_one(),
 
@@ -149,7 +155,7 @@ f2() ->
 f_one() ->
     1.0.
 
-sean(Config) when list(Config) ->
+sean(Config) when is_list(Config) ->
     ?line small = sean1(<<>>),
     ?line small = sean1(<<1>>),
     ?line small = sean1(<<1,2>>),
@@ -162,5 +168,414 @@ sean(Config) when list(Config) ->
     ?line {'EXIT',{function_clause,_}} = (catch sean1(<<4,5,6,7>>)),
     ok.
 
-sean1(<<B/binary>>) when size(B) < 4 ->	small;
+sean1(<<B/binary>>) when byte_size(B) < 4 -> small;
 sean1(<<1, _B/binary>>) -> large.
+
+kenneth(Config) when is_list(Config) ->
+    {ok,[145,148,113,129,0,0,0,0]} =
+	msisdn_internal_storage(<<145,148,113,129,0,0,0,0>>, []).
+
+msisdn_internal_storage(<<>>,MSISDN) ->
+    {ok,lists:reverse(MSISDN)};
+msisdn_internal_storage(<<2#11111111:8,_Rest/binary>>,MSISDN) ->
+    {ok,lists:reverse(MSISDN)};
+msisdn_internal_storage(<<2#1111:4,DigitN:4,_Rest/binary>>,MSISDN) when
+    DigitN < 10 ->
+    {ok,lists:reverse([(DigitN bor 2#11110000)|MSISDN])};
+msisdn_internal_storage(<<DigitNplus1:4,DigitN:4,Rest/binary>>,MSISDN) when
+    DigitNplus1 < 10,
+    DigitN < 10 ->
+    NewMSISDN=[((DigitNplus1 bsl 4) bor DigitN)|MSISDN],
+    msisdn_internal_storage(Rest,NewMSISDN);
+msisdn_internal_storage(_Rest,_MSISDN) ->
+    {fault}. %% Mandatory IE incorrect
+
+encode_binary(Config) when is_list(Config) ->
+    "C2J2QiSc" = encodeBinary(<<11,98,118,66,36,156>>, []),
+    ok.
+
+encodeBinary(<<>>, Output) ->
+    lists:reverse(Output);
+encodeBinary(<<Data:1/binary>>, Output) ->
+    <<DChar1:6, DChar2:2>> = Data,
+    Char1 = getBase64Char(DChar1),
+    Char2 = getBase64Char(DChar2),
+    Char3 = "=",
+    Char4 = "=",
+    NewOutput = Char4 ++ Char3 ++ Char2 ++ Char1 ++ Output,
+    encodeBinary(<<>>, NewOutput);
+encodeBinary(<<Data:2/binary>>, Output) ->
+    <<DChar1:6, DChar2:6, DChar3:4>> = Data,
+    Char1 = getBase64Char(DChar1),
+    Char2 = getBase64Char(DChar2),
+    Char3 = getBase64Char(DChar3),
+    Char4 = "=",
+    NewOutput = Char4 ++ Char3 ++ Char2 ++ Char1 ++ Output,
+    encodeBinary(<<>>, NewOutput);
+encodeBinary(<<Data:3/binary, Rest/binary>>, Output) ->
+    <<DChar1:6, DChar2:6, DChar3:6, DChar4:6>> = Data,
+    Char1 = getBase64Char(DChar1),
+    Char2 = getBase64Char(DChar2),
+    Char3 = getBase64Char(DChar3),
+    Char4 = getBase64Char(DChar4),
+    NewOutput = Char4 ++ Char3 ++ Char2 ++ Char1 ++ Output,
+    encodeBinary(Rest, NewOutput);
+encodeBinary(_Data, _) ->
+    error.
+
+getBase64Char(0)  -> "A";
+getBase64Char(1)  -> "B";
+getBase64Char(2)  -> "C";
+getBase64Char(3)  -> "D";
+getBase64Char(4)  -> "E";
+getBase64Char(5)  -> "F";
+getBase64Char(6)  -> "G";
+getBase64Char(7)  -> "H";
+getBase64Char(8)  -> "I";
+getBase64Char(9)  -> "J";
+getBase64Char(10) -> "K";
+getBase64Char(11) -> "L";
+getBase64Char(12) -> "M";
+getBase64Char(13) -> "N";
+getBase64Char(14) -> "O";
+getBase64Char(15) -> "P";
+getBase64Char(16) -> "Q";
+getBase64Char(17) -> "R";
+getBase64Char(18) -> "S";
+getBase64Char(19) -> "T";
+getBase64Char(20) -> "U";
+getBase64Char(21) -> "V";
+getBase64Char(22) -> "W";
+getBase64Char(23) -> "X";
+getBase64Char(24) -> "Y";
+getBase64Char(25) -> "Z";
+getBase64Char(26) -> "a";
+getBase64Char(27) -> "b";
+getBase64Char(28) -> "c";
+getBase64Char(29) -> "d";
+getBase64Char(30) -> "e";
+getBase64Char(31) -> "f";
+getBase64Char(32) -> "g";
+getBase64Char(33) -> "h";
+getBase64Char(34) -> "i";
+getBase64Char(35) -> "j";
+getBase64Char(36) -> "k";
+getBase64Char(37) -> "l";
+getBase64Char(38) -> "m";
+getBase64Char(39) -> "n";
+getBase64Char(40) -> "o";
+getBase64Char(41) -> "p";
+getBase64Char(42) -> "q";
+getBase64Char(43) -> "r";
+getBase64Char(44) -> "s";
+getBase64Char(45) -> "t";
+getBase64Char(46) -> "u";
+getBase64Char(47) -> "v";
+getBase64Char(48) -> "w";
+getBase64Char(49) -> "x";
+getBase64Char(50) -> "y";
+getBase64Char(51) -> "z";
+getBase64Char(52) -> "0";
+getBase64Char(53) -> "1";
+getBase64Char(54) -> "2";
+getBase64Char(55) -> "3";
+getBase64Char(56) -> "4";
+getBase64Char(57) -> "5";
+getBase64Char(58) -> "6";
+getBase64Char(59) -> "7";
+getBase64Char(60) -> "8";
+getBase64Char(61) -> "9";
+getBase64Char(62) -> "+";
+getBase64Char(63) -> "/";
+getBase64Char(_Else) ->
+    %% This is an illegal input.
+%    cgLogEM:log(error, ?MODULE, getBase64Char, [Else],
+%		"illegal input",
+%		?LINE, version()),
+    "**".
+
+-define(M(F), <<F>> = <<F>>).
+
+native(Config) when is_list(Config) ->
+    ?line ?M(3.14:64/native-float),
+    ?line ?M(333:16/native),
+    ?line ?M(38658345:32/native),
+    case <<1:16/native>> of
+	<<0,1>> -> native_big();
+	<<1,0>> -> native_little()
+    end.
+
+native_big() ->
+    ?line <<37.33:64/native-float>> = <<37.33:64/big-float>>,
+    ?line <<3974:16/native-integer>> = <<3974:16/big-integer>>,
+    {comment,"Big endian"}.
+
+native_little() ->
+    ?line <<37869.32343:64/native-float>> = <<37869.32343:64/little-float>>,
+    ?line <<7974:16/native-integer>> = <<7974:16/little-integer>>,
+    {comment,"Little endian"}.
+
+happi(Config) when is_list(Config) ->
+    Bin = <<".123">>,
+    ?line <<"123">> = lex_digits1(Bin, 1, []),
+    ?line <<"123">> = lex_digits2(Bin, 1, []),
+    ok.
+
+lex_digits1(<<$., Rest/binary>>,_Val,_Acc) ->
+    Rest;
+lex_digits1(<<N, Rest/binary>>,Val, Acc) when N >= $0 , N =< $9 ->
+    lex_digits1(Rest,Val*10+dec(N),Acc);
+lex_digits1(_Other,_Val,_Acc) ->
+    not_ok.
+
+lex_digits2(<<N, Rest/binary>>,Val, Acc) when N >= $0 , N =< $9 ->
+    lex_digits2(Rest,Val*10+dec(N),Acc);
+lex_digits2(<<$., Rest/binary>>,_Val,_Acc) ->
+    Rest;
+lex_digits2(_Other,_Val,_Acc) ->
+    not_ok.
+
+dec(A) ->
+    A-$0.
+
+size_var(Config) when is_list(Config) ->
+    ?line {<<45>>,<<>>} = split(<<1:16,45>>),
+    ?line {<<45>>,<<46,47>>} = split(<<1:16,45,46,47>>),
+    ?line {<<45,46>>,<<47>>} = split(<<2:16,45,46,47>>),
+
+    ?line {<<45,46,47>>,<<48>>} = split_2(<<16:8,3:16,45,46,47,48>>),
+
+    ?line {<<45,46>>,<<47>>} = split(2, <<2:16,45,46,47>>),
+    ?line {'EXIT',{function_clause,_}} = (catch split(42, <<2:16,45,46,47>>)),
+
+    ?line <<"cdef">> = skip(<<2:8,"abcdef">>),
+
+    ok.
+
+split(<<N:16,B:N/binary,T/binary>>) ->
+    {B,T}.
+
+split(N, <<N:16,B:N/binary,T/binary>>) ->
+    {B,T}.
+
+split_2(<<N0:8,N:N0,B:N/binary,T/binary>>) ->
+    {B,T}.
+
+skip(<<N:8,_:N/binary,T/binary>>) -> T.
+
+wiger(Config) when is_list(Config) ->
+    ?line ok1 = wcheck(<<3>>),
+    ?line ok2 = wcheck(<<1,2,3>>),
+    ?line ok3 = wcheck(<<4>>),
+    ?line {error,<<1,2,3,4>>} = wcheck(<<1,2,3,4>>),
+    ?line {error,<<>>} = wcheck(<<>>),
+    ok.
+
+wcheck(<<A>>) when A==3->
+    ok1;
+wcheck(<<_,_:2/binary>>) ->
+    ok2;
+wcheck(<<_>>) ->
+    ok3;
+wcheck(Other) ->
+    {error,Other}.
+
+%% Test that having the match context in x(0) works.
+
+x0_context(Config) when is_list(Config) ->
+    x0_0([], <<3.0:64/float,42:16,123456:32>>).
+
+x0_0(_, Bin) ->
+    <<3.0:64/float,42:16,_/binary>> = Bin,
+    x0_1([], Bin, 64, 16, 2).
+
+x0_1(_, Bin, FloatSz, IntSz, BinSz) ->
+    <<_:FloatSz/float,42:IntSz,B:BinSz/binary,C:1/binary,D/binary>> = Bin,
+    id({B,C,D}),
+    <<_:FloatSz/float,42:IntSz,B:BinSz/binary,_/binary>> = Bin,
+    x0_2([], Bin).
+
+x0_2(_, Bin) ->
+    <<_:64,0:7,42:9,_/binary>> = Bin,
+    x0_3([], Bin).
+
+x0_3(_, Bin) ->
+    case Bin of
+	<<_:72,7:8,_/binary>> ->
+	    ?line ?t:fail();
+	<<_:64,0:16,_/binary>> ->
+	    ?line ?t:fail();
+	<<_:64,42:16,123456:32,_/binary>> ->
+	    ok
+    end.
+
+
+huge_float_field(Config) when is_list(Config) ->
+    Sz = 1 bsl 27,
+    ?line Bin = <<0:Sz>>,
+
+    ?line nomatch = overflow_huge_float_skip_32(Bin),
+    ?line nomatch = overflow_huge_float_32(Bin),
+
+    ?line ok = overflow_huge_float(Bin, lists:seq(25, 32)++lists:seq(50, 64)),
+    ?line ok = overflow_huge_float_unit128(Bin, lists:seq(25, 32)++lists:seq(50, 64)),
+    ok.
+
+overflow_huge_float_skip_32(<<_:4294967296/float,0,_/binary>>) -> 1; % 1 bsl 32
+overflow_huge_float_skip_32(<<_:33554432/float-unit:128,0,_/binary>>) -> 2; % 1 bsl 25
+overflow_huge_float_skip_32(<<_:67108864/float-unit:64,0,_/binary>>) -> 3; % 1 bsl 26
+overflow_huge_float_skip_32(<<_:134217728/float-unit:32,0,_/binary>>) -> 4; % 1 bsl 27
+overflow_huge_float_skip_32(<<_:268435456/float-unit:16,0,_/binary>>) -> 5; % 1 bsl 28
+overflow_huge_float_skip_32(<<_:536870912/float-unit:8,0,_/binary>>) -> 6; % 1 bsl 29
+overflow_huge_float_skip_32(<<_:1073741824/float-unit:8,0,_/binary>>) -> 7; % 1 bsl 30
+overflow_huge_float_skip_32(<<_:2147483648/float-unit:8,0,_/binary>>) -> 8; % 1 bsl 31
+overflow_huge_float_skip_32(_) -> nomatch.
+
+overflow_huge_float_32(<<F:4294967296/float,_/binary>>) -> {1,F}; % 1 bsl 32
+overflow_huge_float_32(<<F:33554432/float-unit:128,0,_/binary>>) -> {2,F}; % 1 bsl 25
+overflow_huge_float_32(<<F:67108864/float-unit:128,0,_/binary>>) -> {3,F}; % 1 bsl 26
+overflow_huge_float_32(<<F:134217728/float-unit:128,0,_/binary>>) -> {4,F}; % 1 bsl 27
+overflow_huge_float_32(<<F:268435456/float-unit:128,0,_/binary>>) -> {5,F}; % 1 bsl 28
+overflow_huge_float_32(<<F:536870912/float-unit:128,0,_/binary>>) -> {6,F}; % 1 bsl 29
+overflow_huge_float_32(<<F:1073741824/float-unit:128,0,_/binary>>) -> {7,F}; % 1 bsl 30
+overflow_huge_float_32(<<F:2147483648/float-unit:128,0,_/binary>>) -> {8,F}; % 1 bsl 31
+overflow_huge_float_32(_) -> nomatch.
+
+
+overflow_huge_float(Bin, [Sz0|Sizes]) ->
+    Sz = id(1 bsl Sz0),
+    case Bin of
+	<<_:Sz/float-unit:8,0,_/binary>> ->
+	    {error,Sz};
+	_ ->
+	    case Bin of
+		<<Var:Sz/float-unit:8,0,_/binary>> ->
+		    {error,Sz,Var};
+		_ ->
+		    overflow_huge_float(Bin, Sizes)
+	    end
+    end;
+overflow_huge_float(_, []) -> ok.
+
+overflow_huge_float_unit128(Bin, [Sz0|Sizes]) ->
+    Sz = id(1 bsl Sz0),
+    case Bin of
+	<<_:Sz/float-unit:128,0,_/binary>> ->
+	    {error,Sz};
+	_ ->
+	    case Bin of
+		<<Var:Sz/float-unit:128,0,_/binary>> ->
+		    {error,Sz,Var};
+		_ ->
+		    overflow_huge_float_unit128(Bin, Sizes)
+	    end
+    end;
+overflow_huge_float_unit128(_, []) -> ok.
+
+
+%%
+%% Test that a writable binary can be safely matched.
+%%
+
+writable_binary_matched(Config) when is_list(Config) ->
+    ?line WritableBin = create_writeable_binary(),
+    ?line writable_binary_matched(WritableBin, WritableBin, 500).
+
+writable_binary_matched(<<0>>, _, N) ->
+    if
+	N =:= 0 -> ok;
+	true ->
+	    put(grow_heap, [N|get(grow_heap)]),
+	    ?line WritableBin = create_writeable_binary(),
+	    ?line writable_binary_matched(WritableBin, WritableBin, N-1)
+    end;
+writable_binary_matched(<<B:8,T/binary>>, WritableBin0, N) ->
+    ?line WritableBin = writable_binary(WritableBin0, B),
+    writable_binary_matched(T, WritableBin, N).
+
+writable_binary(WritableBin0, B) when is_binary(WritableBin0) ->
+    %% Heavy append to force the binary to move.
+    ?line WritableBin = <<WritableBin0/binary,0:(size(WritableBin0))/unit:8,B>>,
+    ?line id(<<(id(0)):128/unit:8>>),
+    WritableBin.
+
+create_writeable_binary() ->
+  <<(id(<<>>))/binary,1,2,3,4,5,6,0>>.
+
+otp_7198(Config) when is_list(Config) ->
+    %% When a match context was reused, and grown at the same time to
+    %% increase the number of saved positions, the thing word was not updated
+    %% to account for the new size. Therefore, if there was a garbage collection,
+    %% the new slots would be included in the garbage collection.
+    ?line [do_otp_7198(FillerSize) || FillerSize <- lists:seq(0, 256)],
+    ok.
+
+do_otp_7198(FillerSize) ->
+    Filler = erlang:make_tuple(FillerSize, 42),
+    {Pid,Ref} = spawn_monitor(fun() -> do_otp_7198_test(Filler) end),
+    receive
+	{'DOWN',Ref,process,Pid,normal} ->
+	    ok;
+	{'DOWN',Ref,process,Pid,Reason} ->
+	    io:format("unexpected: ~p", [Reason]),
+	    ?line ?t:fail()
+    end.
+
+do_otp_7198_test(_) ->
+    [{'KEYWORD',114},
+     {'KEYWORD',101},
+     {'KEYWORD',103},
+     {'KEYWORD',105},
+     {'KEYWORD',111},
+     {'FIELD',110},
+     {'KEYWORD',119},
+     {'KEYWORD',104},
+     {'KEYWORD',97},
+     {'KEYWORD',116},
+     {'KEYWORD',101},
+     {'KEYWORD',118},
+     {'KEYWORD',101},
+     {'KEYWORD',114},
+     '$thats_all_folks$'] = otp_7198_scan(<<"region:whatever">>, []).
+
+
+otp_7198_scan(<<>>, TokAcc) ->
+        lists:reverse(['$thats_all_folks$' | TokAcc]);
+
+otp_7198_scan(<<D, Z, Rest/binary>>, TokAcc) when
+                        (D =:= $D orelse D =:= $d) and
+                        ((Z =:= $\s) or (Z =:= $() or (Z =:= $))) ->
+        otp_7198_scan(<<Z, Rest/binary>>, ['AND' | TokAcc]);
+
+otp_7198_scan(<<D>>, TokAcc) when
+                        (D =:= $D) or (D =:= $d) ->
+        otp_7198_scan(<<>>, ['AND' | TokAcc]);
+
+otp_7198_scan(<<N, Z, Rest/binary>>, TokAcc) when
+                        (N =:= $N orelse N =:= $n) and
+                        ((Z =:= $\s) or (Z =:= $() or (Z =:= $))) ->
+        otp_7198_scan(<<Z, Rest/binary>>, ['NOT' | TokAcc]);
+
+otp_7198_scan(<<C, Rest/binary>>, TokAcc) when
+                                (C >= $A) and (C =< $Z);
+                                (C >= $a) and (C =< $z);
+                                (C >= $0) and (C =< $9) ->
+        case Rest of
+                <<$:, R/binary>> ->
+                        otp_7198_scan(R, [{'FIELD', C} | TokAcc]);
+                _ ->
+                        otp_7198_scan(Rest, [{'KEYWORD', C} | TokAcc])
+        end.
+
+unordered_bindings(Config) when is_list(Config) ->
+    {<<1,2,3,4>>,<<42,42>>,<<3,3,3>>} =
+	unordered_bindings(4, 2, 3, <<1,2,3,4, 42,42, 3,3,3, 3>>),
+    ok.
+
+unordered_bindings(CompressedLength, HashSize, PadLength, T) ->
+    <<Content:CompressedLength/binary,Mac:HashSize/binary,
+     Padding:PadLength/binary,PadLength>> = T,
+    {Content,Mac,Padding}.
+
+
+id(I) -> I.
diff --git a/lib/debugger/test/bs_match_tail_SUITE.erl b/lib/debugger/test/bs_match_tail_SUITE.erl
index 961ccbb599..9f7519cf3a 100644
--- a/lib/debugger/test/bs_match_tail_SUITE.erl
+++ b/lib/debugger/test/bs_match_tail_SUITE.erl
@@ -64,7 +64,7 @@ end_per_suite(Config) when is_list(Config) ->
     ok.
 
 aligned(doc) -> "Test aligned tails.";
-aligned(Config) when list(Config) ->
+aligned(Config) when is_list(Config) ->
     ?line Tail1 = mkbin([]),
     ?line {258,Tail1} = al_get_tail_used(mkbin([1,2])),
     ?line Tail2 = mkbin(lists:seq(1, 127)),
@@ -84,10 +84,10 @@ aligned(Config) when list(Config) ->
     ok.
 
 al_get_tail_used(<<A:16,T/binary>>) -> {A,T}.
-al_get_tail_unused(<<A:16,_T/binary>>) -> A.
+al_get_tail_unused(<<A:16,_/binary>>) -> A.
 
 unaligned(doc) -> "Test that an non-aligned tail cannot be matched out.";
-unaligned(Config) when list(Config) ->
+unaligned(Config) when is_list(Config) ->
     ?line {'EXIT',{function_clause,_}} = (catch get_tail_used(mkbin([42]))),
     ?line {'EXIT',{{badmatch,_},_}} = (catch get_dyn_tail_used(mkbin([137]), 3)),
     ?line {'EXIT',{function_clause,_}} = (catch get_tail_unused(mkbin([42,33]))),
@@ -103,11 +103,11 @@ get_dyn_tail_used(Bin, Sz) ->
     {A,T}.
 
 get_dyn_tail_unused(Bin, Sz) ->
-    <<A:Sz,_T/binary>> = Bin,
+    <<A:Sz,_/binary>> = Bin,
     A.
 
 zero_tail(doc) -> "Test that zero tails are tested correctly.";
-zero_tail(Config) when list(Config) ->
+zero_tail(Config) when is_list(Config) ->
     ?line 7 = (catch test_zero_tail(mkbin([7]))),
     ?line {'EXIT',{function_clause,_}} = (catch test_zero_tail(mkbin([1,2]))),
     ?line {'EXIT',{function_clause,_}} = (catch test_zero_tail2(mkbin([1,2,3]))),
@@ -117,4 +117,4 @@ test_zero_tail(<<A:8>>) -> A.
 
 test_zero_tail2(<<_A:4,_B:4>>) -> ok.
 
-mkbin(L) when list(L) -> list_to_binary(L).
+mkbin(L) when is_list(L) -> list_to_binary(L).
diff --git a/lib/debugger/test/bug_SUITE.erl b/lib/debugger/test/bug_SUITE.erl
index a831897dfb..1a7e876329 100644
--- a/lib/debugger/test/bug_SUITE.erl
+++ b/lib/debugger/test/bug_SUITE.erl
@@ -51,7 +51,7 @@ end_per_group(_GroupName, Config) ->
 
 otp2163(doc) -> ["BIF exit reason"];
 otp2163(suite) -> [];
-otp2163(Config) when list(Config) ->
+otp2163(Config) when is_list(Config) ->
     ?line DataDir = ?config(data_dir, Config),
 
     %% First compile and get the expected results:
@@ -74,7 +74,7 @@ otp2163(Config) when list(Config) ->
 
 otp4845(doc) -> ["BIF not loading and not bug compatible, OTP-4845 OTP-4859"];
 otp4845(suite) -> [];
-otp4845(Config) when list(Config) ->
+otp4845(Config) when is_list(Config) ->
     ?line DataDir = ?config(data_dir, Config),
 
     %% First compile and get the expected results:
diff --git a/lib/debugger/test/exception_SUITE.erl b/lib/debugger/test/exception_SUITE.erl
index 8c864e4b5f..86554ab2d4 100644
--- a/lib/debugger/test/exception_SUITE.erl
+++ b/lib/debugger/test/exception_SUITE.erl
@@ -23,7 +23,8 @@
 -export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
 	 init_per_testcase/2,end_per_testcase/2,
 	 init_per_suite/1,end_per_suite/1,
-	 badmatch/1,pending_errors/1,nil_arith/1]).
+	 badmatch/1,pending_errors/1,nil_arith/1,
+         stacktrace/1,nested_stacktrace/1,raise/1,gunilla/1,per/1]).
 
 -export([bad_guy/2]).
 
@@ -31,6 +32,19 @@
 
 suite() -> [{ct_hooks,[ts_install_cth]}].
 
+%% Filler.
+%%
+%%
+%%
+%%
+%% This is line 40.
+even(N) when is_integer(N), N > 1, (N rem 2) == 0 ->
+    odd(N-1)++[N].
+
+odd(N) when is_integer(N), N > 1, (N rem 2) == 1 ->
+    even(N-1)++[N].
+
+
 all() -> 
     cases().
 
@@ -45,7 +59,8 @@ end_per_group(_GroupName, Config) ->
 
 
 cases() -> 
-    [badmatch, pending_errors, nil_arith].
+    [badmatch, pending_errors, nil_arith, stacktrace,
+     nested_stacktrace, raise, gunilla, per].
 
 -define(try_match(E),
 	catch ?MODULE:bar(),
@@ -69,9 +84,9 @@ init_per_suite(Config) when is_list(Config) ->
 end_per_suite(Config) when is_list(Config) ->
     ok.
 
-badmatch(doc) -> "Test that deliberately bad matches are reported correctly.";
-badmatch(suite) -> [];
-badmatch(Config) when list(Config) ->
+%% Test that deliberately bad matches are reported correctly.
+
+badmatch(Config) when is_list(Config) ->
     ?line ?try_match(a),
     ?line ?try_match(42),
     ?line ?try_match({a, b, c}),
@@ -79,11 +94,9 @@ badmatch(Config) when list(Config) ->
     ?line ?try_match(1.0),
     ok.
 
-pending_errors(doc) ->
-    ["Test various exceptions, in the presence of a previous error suppressed ",
-     "in a guard."];
-pending_errors(suite) -> [];
-pending_errors(Config) when list(Config) ->
+%% Test various exceptions, in the presence of a previous error suppressed
+%% in a guard.
+pending_errors(Config) when is_list(Config) ->
     ?line pending(e_badmatch, {badmatch, b}),
     ?line pending(x, function_clause),
     ?line pending(e_case, {case_clause, xxx}),
@@ -100,7 +113,7 @@ bad_guy(pe_badarith, Other) when Other+1 == 0 -> % badarith (suppressed)
 bad_guy(pe_badarg, Other) when length(Other) > 0 -> % badarg (suppressed)
     ok;
 bad_guy(_, e_case) ->
-    case xxx of
+    case id(xxx) of
 	ok -> ok
     end;					% case_clause
 bad_guy(_, e_if) ->
@@ -121,7 +134,7 @@ bad_guy(_, e_badarg) ->
 bad_guy(_, e_badarg_spawn) ->
     spawn({}, {}, {});				% badarg
 bad_guy(_, e_badmatch) ->
-    a = b.					% badmatch
+    a = id(b).					% badmatch
 
 pending(Arg, Expected) ->
     pending(pe_badarith, Arg, Expected),
@@ -155,28 +168,23 @@ pending_exit_message(Args, Expected) ->
     end,
     process_flag(trap_exit, false).
 
-pending({badarg,[{erlang,Bif,BifArgs},{?MODULE,Func,Arity}|_]}, Func, Args, _Code)
-  when atom(Bif), list(BifArgs), length(Args) == Arity -> %Threaded code.
-    ok;
-pending({badarg,[{erlang,Bif,BifArgs},{?MODULE,Func,Args}|_]}, Func, Args, _Code)
-  when atom(Bif), list(BifArgs) -> %From interpreted code.
+pending({badarg, [{erlang,Bif,BifArgs,_},{?MODULE,Func,Arity,_}|_]},
+	Func, Args, _Code)
+  when is_atom(Bif), is_list(BifArgs), length(Args) == Arity ->
     ok;
-pending({undef,[{non_existing_module,foo,[]}|_]}, _, _, _) ->
+pending({undef,[{non_existing_module,foo,[],_}|_]}, _, _, _) ->
     ok;
-pending({function_clause,[{?MODULE,Func,Args}|_]}, Func, Args, _Code) ->
+pending({function_clause,[{?MODULE,Func,Args,_}|_]}, Func, Args, _Code) ->
     ok;
-pending({Code,[{?MODULE,Func,Arity}|_]}, Func, Args, Code) when length(Args) == Arity -> %Threaded code
+pending({Code,[{?MODULE,Func,Arity,_}|_]}, Func, Args, Code)
+  when length(Args) == Arity ->
     ok;
-pending({Code,[{?MODULE,Func,Args}|_]}, Func, Args, Code) -> %From interpreted code.
-    ok;
-pending(Reason, Func, Args, Code) ->
-    test_server:fail({bad_exit_reason,Reason,{Func,Args,Code}}).
-
-nil_arith(doc) ->
-    "Test that doing arithmetics on [] gives a badarith EXIT and not a crash.";
-nil_arith(suite) ->
-    [];
-nil_arith(Config) when list(Config) ->
+pending(Reason, _Function, _Args, _Code) ->
+    test_server:fail({bad_exit_reason,Reason}).
+
+%% Test that doing arithmetics on [] gives a badarith EXIT and not a crash.
+
+nil_arith(Config) when is_list(Config) ->
     ?line ba_plus_minus_times([], []),
 
     ?line ba_plus_minus_times([], 0),
@@ -268,3 +276,199 @@ ba_shift(A, B) ->
 ba_bnot(A) ->
     io:format("bnot ~p", [A]),
     {'EXIT', {badarith, _}} = (catch bnot A).
+
+stacktrace(Conf) when is_list(Conf) ->
+    Tag = make_ref(),
+    ?line {_,Mref} = spawn_monitor(fun() -> exit({Tag,erlang:get_stacktrace()}) end),
+    ?line {Tag,[]} = receive {'DOWN',Mref,_,_,Info} -> Info end,
+    V = [make_ref()|self()],
+    ?line {value2,{caught1,badarg,[{erlang,abs,[V],_}|_]=St1}} =
+	stacktrace_1({'abs',V}, error, {value,V}),
+    ?line St1 = erase(stacktrace1),
+    ?line St1 = erase(stacktrace2),
+    ?line St1 = erlang:get_stacktrace(),
+    ?line {caught2,{error,badarith},[{?MODULE,my_add,2,_}|_]=St2} =
+	stacktrace_1({'div',{1,0}}, error, {'add',{0,a}}),
+    ?line [{?MODULE,my_div,2,_}|_] = erase(stacktrace1),
+    ?line St2 = erase(stacktrace2),
+    ?line St2 = erlang:get_stacktrace(),
+    ?line {caught2,{error,{try_clause,V}},[{?MODULE,stacktrace_1,3,_}|_]=St3} =
+	stacktrace_1({value,V}, error, {value,V}),
+    ?line St3 = erase(stacktrace1),
+    ?line St3 = erase(stacktrace2),
+    ?line St3 = erlang:get_stacktrace(),
+    ?line {caught2,{throw,V},[{?MODULE,foo,1,_}|_]=St4} =
+	stacktrace_1({value,V}, error, {throw,V}),
+    ?line [{?MODULE,stacktrace_1,3,_}|_] = erase(stacktrace1),
+    ?line St4 = erase(stacktrace2),
+    ?line St4 = erlang:get_stacktrace(),
+    ok.
+
+stacktrace_1(X, C1, Y) ->
+    erase(stacktrace1),
+    erase(stacktrace2),
+    try try foo(X) of
+            C1 -> value1
+        catch
+            C1:D1 -> {caught1,D1,erlang:get_stacktrace()}
+        after
+            put(stacktrace1, erlang:get_stacktrace()),
+	    foo(Y)
+        end of
+        V2 -> {value2,V2}
+    catch
+        C2:D2 -> {caught2,{C2,D2},erlang:get_stacktrace()}
+    after
+        put(stacktrace2, erlang:get_stacktrace())
+    end.
+
+
+
+nested_stacktrace(Conf) when is_list(Conf) ->
+    V = [{make_ref()}|[self()]],
+    ?line value1 =
+	nested_stacktrace_1({{value,{V,x1}},void,{V,x1}},
+			    {void,void,void}),
+    ?line {caught1,
+	   [{?MODULE,my_add,2,_}|_],
+	   value2,
+	   [{?MODULE,my_add,2,_}|_]} =
+	nested_stacktrace_1({{'add',{V,x1}},error,badarith},
+			    {{value,{V,x2}},void,{V,x2}}),
+    ?line {caught1,
+	   [{?MODULE,my_add,2,_}|_],
+	   {caught2,[{erlang,abs,[V],_}|_]},
+	   [{erlang,abs,[V],_}|_]} =
+	nested_stacktrace_1({{'add',{V,x1}},error,badarith},
+			    {{'abs',V},error,badarg}),
+    ok.
+
+nested_stacktrace_1({X1,C1,V1}, {X2,C2,V2}) ->
+    try foo(X1) of
+        V1 -> value1
+    catch
+        C1:V1 ->
+	    S1 = erlang:get_stacktrace(),
+            T2 =
+                try foo(X2) of
+	            V2 -> value2
+                catch
+                    C2:V2 -> {caught2,erlang:get_stacktrace()}
+                end,
+            {caught1,S1,T2,erlang:get_stacktrace()}
+    end.
+
+
+
+raise(Conf) when is_list(Conf) ->
+    ?line erase(raise),
+    ?line A =
+	try
+	    ?line try foo({'div',{1,0}})
+		  catch
+		      error:badarith ->
+			  put(raise, A0 = erlang:get_stacktrace()),
+			  ?line erlang:raise(error, badarith, A0)
+		  end
+	catch
+	    error:badarith ->
+		?line A1 = erlang:get_stacktrace(),
+		?line A1 = get(raise)
+	end,
+    ?line A = erlang:get_stacktrace(),
+    ?line A = get(raise),
+    ?line [{?MODULE,my_div,2,_}|_] = A,
+    %%
+    N = 8, % Must be even
+    ?line N = erlang:system_flag(backtrace_depth, N),
+    ?line try even(N)
+	  catch error:function_clause -> ok
+	  end,
+    ?line B = odd_even(N, []),
+    ?line B = erlang:get_stacktrace(),
+    %%
+    ?line C0 = odd_even(N+1, []),
+    ?line C = lists:sublist(C0, N),
+    ?line try odd(N+1)
+	  catch error:function_clause -> ok
+	  end,
+    ?line C = erlang:get_stacktrace(),
+    ?line try erlang:raise(error, function_clause, C0)
+          catch error:function_clause -> ok
+          end,
+    ?line C = erlang:get_stacktrace(),
+    ok.
+
+odd_even(N, R) when is_integer(N), N > 1 ->
+    odd_even(N-1,
+	     [if (N rem 2) == 0 ->
+		      {?MODULE,even,1,[{file,?MODULE_STRING++".erl"},
+				       {line,42}]};
+		 true ->
+		      {?MODULE,odd,1,[{file,?MODULE_STRING++".erl"},
+				      {line,45}]}
+	      end|R]);
+odd_even(1, R) ->
+    [{?MODULE,odd,[1],[{file,?MODULE_STRING++".erl"},
+		       {line,44}]}|R].
+
+foo({value,Value}) -> Value;
+foo({'div',{A,B}}) ->
+    my_div(A, B);
+foo({'add',{A,B}}) ->
+    my_add(A, B);
+foo({'abs',X}) ->
+    my_abs(X);
+foo({error,Error}) ->
+    erlang:error(Error);
+foo({throw,Throw}) ->
+    erlang:throw(Throw);
+foo({exit,Exit}) ->
+    erlang:exit(Exit);
+foo({raise,{Class,Reason,Stacktrace}}) ->
+    erlang:raise(Class, Reason, Stacktrace).
+%%foo(function_clause) -> % must not be defined!
+
+my_div(A, B) ->
+    A div B.
+
+my_add(A, B) ->
+    A + B.
+
+my_abs(X) -> abs(X).
+
+gunilla(Config) when is_list(Config) ->
+    ?line {throw,kalle} = gunilla_1(),
+    ?line [] = erlang:get_stacktrace(),
+    ok.
+
+gunilla_1() ->
+    try try arne()
+	after
+	    pelle
+	end
+    catch
+	C:R ->
+	    {C,R}
+    end.
+
+arne() ->
+    %% Empty stack trace used to cause change the error class to 'error'.
+    erlang:raise(throw, kalle, []).
+
+per(Config) when is_list(Config) ->
+    try
+	t1(0,pad,0),
+	t2(0,pad,0)
+    catch
+	error:badarith ->
+	    ok
+    end.
+
+t1(_,X,_) ->
+   (1 bsl X) + 1.
+
+t2(_,X,_) ->
+   (X bsl 1) + 1.
+
+id(I) -> I.
diff --git a/lib/debugger/test/guard_SUITE.erl b/lib/debugger/test/guard_SUITE.erl
index 611dcb4dff..bf5fa82749 100644
--- a/lib/debugger/test/guard_SUITE.erl
+++ b/lib/debugger/test/guard_SUITE.erl
@@ -35,7 +35,8 @@
 	 t_is_boolean/1,is_function_2/1,
 	 tricky/1,rel_ops/1,
 	 basic_andalso_orelse/1,traverse_dcd/1,
-	 check_qlc_hrl/1]).
+	 check_qlc_hrl/1,andalso_semi/1,t_tuple_size/1,binary_part/1,
+	 bad_constants/1]).
 
 -include_lib("test_server/include/test_server.hrl").
 
@@ -65,7 +66,8 @@ cases() ->
      xor_guard, more_xor_guards, build_in_guard,
      old_guard_tests, gbif, t_is_boolean, is_function_2,
      tricky, rel_ops, basic_andalso_orelse, traverse_dcd,
-     check_qlc_hrl].
+     check_qlc_hrl, andalso_semi, t_tuple_size, binary_part,
+     bad_constants].
 
 init_per_testcase(_Case, Config) ->
     test_lib:interpret(?MODULE),
@@ -294,9 +296,7 @@ try_gbif(Id, X, Y) ->
 
 try_fail_gbif(Id, X, Y) ->
     case catch guard_bif(Id, X, Y) of
-	{'EXIT', {function_clause,{?MODULE,guard_bif,[Id,X,Y]}}} -> %Jam
-	    io:format("guard_bif(~p, ~p, ~p) -- ok", [Id,X,Y]);
-	{'EXIT', {function_clause,[{?MODULE,guard_bif,[Id,X,Y]}|_]}} ->	%Beam
+	{'EXIT', {function_clause,[{?MODULE,guard_bif,[Id,X,Y],_}|_]}} ->
 	    io:format("guard_bif(~p, ~p, ~p) -- ok", [Id,X,Y]);
 	Other ->
 	    ?line ok = io:format("guard_bif(~p, ~p, ~p) -- bad result: ~p\n",
@@ -367,9 +367,8 @@ type_tests(Test, [Type|T], Allowed) ->
 	    end;
 	false ->
 	    case catch type_test(Test, Value) of
-		{'EXIT', {function_clause, {?MODULE, type_test, [Test, Value]}}} ->
-		    ok;
-		{'EXIT', {function_clause,[{?MODULE,type_test,[Test,Value]}|_]}} ->
+		{'EXIT',{function_clause,
+			 [{?MODULE,type_test,[Test,Value],_}|_]}} ->
 		    ok;
 		{'EXIT',Other} ->
 		    ?line test_server:fail({unexpected_error_reason,Other});
@@ -1477,7 +1476,207 @@ cqlc(M, F, As, St) ->
             St
     end.
 
+%% OTP-7679: Thanks to Hunter Morris.
+andalso_semi(Config) when is_list(Config) ->
+    ?line ok = andalso_semi_foo(0),
+    ?line ok = andalso_semi_foo(1),
+    ?line fc(catch andalso_semi_foo(2)),
+
+    ?line ok = andalso_semi_bar([a,b,c]),
+    ?line ok = andalso_semi_bar(1),
+    ?line fc(catch andalso_semi_bar([a,b])),
+    ok.
+
+andalso_semi_foo(Bar) when is_integer(Bar) andalso Bar =:= 0; Bar =:= 1 ->
+   ok.
+
+andalso_semi_bar(Bar) when is_list(Bar) andalso length(Bar) =:= 3; Bar =:= 1 ->
+   ok.
+
+
+t_tuple_size(Config) when is_list(Config) ->
+    ?line 10 = do_tuple_size({1,2,3,4}),
+    ?line fc(catch do_tuple_size({1,2,3})),
+    ?line fc(catch do_tuple_size(42)),
 
+    ?line error = ludicrous_tuple_size({a,b,c}),
+    ?line error = ludicrous_tuple_size([a,b,c]),
+
+    ok.
+
+do_tuple_size(T) when tuple_size(T) =:= 4 ->
+    {A,B,C,D} = T,
+    A+B+C+D.
+
+ludicrous_tuple_size(T)
+  when tuple_size(T) =:= 16#7777777777777777777777777777777777 -> ok;
+ludicrous_tuple_size(T)
+  when tuple_size(T) =:= 16#10000000000000000 -> ok;
+ludicrous_tuple_size(T)
+  when tuple_size(T) =:= (1 bsl 64) - 1 -> ok;
+ludicrous_tuple_size(T)
+  when tuple_size(T) =:= 16#FFFFFFFFFFFFFFFF -> ok;
+ludicrous_tuple_size(_) -> error.
+
+%%
+%% The binary_part/2,3 guard BIFs
+%%
+-define(MASK_ERROR(EXPR),mask_error((catch (EXPR)))).
+mask_error({'EXIT',{Err,_}}) ->
+    Err;
+mask_error(Else) ->
+    Else.
+
+binary_part(doc) ->
+    ["Tests the binary_part/2,3 guard (GC) bif's"];
+binary_part(Config) when is_list(Config) ->
+    %% This is more or less a copy of what the guard_SUITE in emulator
+    %% does to cover the guard bif's
+    ?line 1 = bptest(<<1,2,3>>),
+    ?line 2 = bptest(<<2,1,3>>),
+    ?line error = bptest(<<1>>),
+    ?line error = bptest(<<>>),
+    ?line error = bptest(apa),
+    ?line 3 = bptest(<<2,3,3>>),
+    % With one variable (pos)
+    ?line 1 = bptest(<<1,2,3>>,1),
+    ?line 2 = bptest(<<2,1,3>>,1),
+    ?line error = bptest(<<1>>,1),
+    ?line error = bptest(<<>>,1),
+    ?line error = bptest(apa,1),
+    ?line 3 = bptest(<<2,3,3>>,1),
+    % With one variable (length)
+    ?line 1 = bptesty(<<1,2,3>>,1),
+    ?line 2 = bptesty(<<2,1,3>>,1),
+    ?line error = bptesty(<<1>>,1),
+    ?line error = bptesty(<<>>,1),
+    ?line error = bptesty(apa,1),
+    ?line 3 = bptesty(<<2,3,3>>,2),
+    % With one variable (whole tuple)
+    ?line 1 = bptestx(<<1,2,3>>,{1,1}),
+    ?line 2 = bptestx(<<2,1,3>>,{1,1}),
+    ?line error = bptestx(<<1>>,{1,1}),
+    ?line error = bptestx(<<>>,{1,1}),
+    ?line error = bptestx(apa,{1,1}),
+    ?line 3 = bptestx(<<2,3,3>>,{1,2}),
+    % With two variables
+    ?line 1 = bptest(<<1,2,3>>,1,1),
+    ?line 2 = bptest(<<2,1,3>>,1,1),
+    ?line error = bptest(<<1>>,1,1),
+    ?line error = bptest(<<>>,1,1),
+    ?line error = bptest(apa,1,1),
+    ?line 3 = bptest(<<2,3,3>>,1,2),
+    % Direct (autoimported) call, these will be evaluated by the compiler...
+    ?line <<2>> = binary_part(<<1,2,3>>,1,1),
+    ?line <<1>> = binary_part(<<2,1,3>>,1,1),
+    % Compiler warnings due to constant evaluation expected (3)
+    ?line badarg = ?MASK_ERROR(binary_part(<<1>>,1,1)),
+    ?line badarg = ?MASK_ERROR(binary_part(<<>>,1,1)),
+    ?line badarg = ?MASK_ERROR(binary_part(apa,1,1)),
+    ?line <<3,3>> = binary_part(<<2,3,3>>,1,2),
+    % Direct call through apply
+    ?line <<2>> = apply(erlang,binary_part,[<<1,2,3>>,1,1]),
+    ?line <<1>> = apply(erlang,binary_part,[<<2,1,3>>,1,1]),
+    % Compiler warnings due to constant evaluation expected (3)
+    ?line badarg = ?MASK_ERROR(apply(erlang,binary_part,[<<1>>,1,1])),
+    ?line badarg = ?MASK_ERROR(apply(erlang,binary_part,[<<>>,1,1])),
+    ?line badarg = ?MASK_ERROR(apply(erlang,binary_part,[apa,1,1])),
+    ?line <<3,3>> = apply(erlang,binary_part,[<<2,3,3>>,1,2]),
+    % Constant propagation
+    ?line  Bin = <<1,2,3>>,
+    ?line  ok = if
+		    binary_part(Bin,1,1) =:= <<2>> ->
+			ok;
+		    %% Compiler warning, clause cannot match (expected)
+		    true ->
+			error
+		end,
+    ?line  ok = if
+		    binary_part(Bin,{1,1}) =:= <<2>> ->
+			ok;
+		    %% Compiler warning, clause cannot match (expected)
+		    true ->
+			error
+		end,
+    ok.
+
+
+bptest(B) when length(B) =:= 1337 ->
+    1;
+bptest(B) when binary_part(B,{1,1}) =:= <<2>> ->
+    1;
+bptest(B) when erlang:binary_part(B,1,1) =:= <<1>> ->
+    2;
+bptest(B)  when erlang:binary_part(B,{1,2}) =:= <<3,3>> ->
+    3;
+bptest(_) ->
+    error.
+
+bptest(B,A) when length(B) =:= A ->
+    1;
+bptest(B,A) when binary_part(B,{A,1}) =:= <<2>> ->
+    1;
+bptest(B,A) when erlang:binary_part(B,A,1) =:= <<1>> ->
+    2;
+bptest(B,A)  when erlang:binary_part(B,{A,2}) =:= <<3,3>> ->
+    3;
+bptest(_,_) ->
+    error.
+
+bptestx(B,A) when length(B) =:= A ->
+    1;
+bptestx(B,A) when binary_part(B,A) =:= <<2>> ->
+    1;
+bptestx(B,A) when erlang:binary_part(B,A) =:= <<1>> ->
+    2;
+bptestx(B,A)  when erlang:binary_part(B,A) =:= <<3,3>> ->
+    3;
+bptestx(_,_) ->
+    error.
+
+bptesty(B,A) when length(B) =:= A ->
+    1;
+bptesty(B,A) when binary_part(B,{1,A}) =:= <<2>> ->
+    1;
+bptesty(B,A) when erlang:binary_part(B,1,A) =:= <<1>> ->
+    2;
+bptesty(B,A)  when erlang:binary_part(B,{1,A}) =:= <<3,3>> ->
+    3;
+bptesty(_,_) ->
+    error.
+
+bptest(B,A,_C) when length(B) =:= A ->
+    1;
+bptest(B,A,C) when binary_part(B,{A,C}) =:= <<2>> ->
+    1;
+bptest(B,A,C) when erlang:binary_part(B,A,C) =:= <<1>> ->
+    2;
+bptest(B,A,C)  when erlang:binary_part(B,{A,C}) =:= <<3,3>> ->
+    3;
+bptest(_,_,_) ->
+    error.
+
+-define(FAILING(C),
+	if
+	    C -> ?t:fail(should_fail);
+	    true -> ok
+	end,
+	if
+	    true, C -> ?t:fail(should_fail);
+	    true -> ok
+	end).
+
+bad_constants(Config) when is_list(Config) ->
+    ?line ?FAILING(false),
+    ?line ?FAILING([]),
+    ?line ?FAILING([a]),
+    ?line ?FAILING([Config]),
+    ?line ?FAILING({a,b}),
+    ?line ?FAILING({a,Config}),
+    ?line ?FAILING(<<1>>),
+    ?line ?FAILING(42),
+    ?line ?FAILING(3.14),
+    ok.
 
 %% Call this function to turn off constant propagation.
 id(I) -> I.
@@ -1490,3 +1689,5 @@ check(F, Result) ->
 	    io:format("     Got: ~p\n", [Other]),
 	    test_server:fail()
     end.
+
+fc({'EXIT',{function_clause,_}}) -> ok.
diff --git a/lib/debugger/test/int_eval_SUITE.erl b/lib/debugger/test/int_eval_SUITE.erl
index f36ed213d1..4ffcf7888e 100644
--- a/lib/debugger/test/int_eval_SUITE.erl
+++ b/lib/debugger/test/int_eval_SUITE.erl
@@ -28,7 +28,7 @@
 	 bifs_outside_erlang/1, spawning/1, applying/1,
 	 catch_and_throw/1, external_call/1, test_module_info/1,
 	 apply_interpreted_fun/1, apply_uninterpreted_fun/1,
-	 interpreted_exit/1, otp_8310/1]).
+	 interpreted_exit/1, otp_8310/1, stacktrace/1]).
 
 %% Helpers.
 -export([applier/3]).
@@ -44,7 +44,7 @@ all() ->
     [bifs_outside_erlang, spawning, applying,
      catch_and_throw, external_call, test_module_info,
      apply_interpreted_fun, apply_uninterpreted_fun,
-     interpreted_exit, otp_8310].
+     interpreted_exit, otp_8310, stacktrace].
 
 groups() -> 
     [].
@@ -191,23 +191,23 @@ apply_interpreted_fun(Config) when is_list(Config) ->
     ?line {ok,ATerm} = spawn_eval(fun() -> F2() end),
 
     %% Called from uninterpreted code, badarity
-    ?line {'EXIT',{{badarity,{F1,[snape]}},[{?MODULE,_,_}|_]}} =
+    ?line {'EXIT',{{badarity,{F1,[snape]}},[{?MODULE,_,_,_}|_]}} =
 	spawn_eval(fun() -> F1(snape) end),
 
     %% Called from uninterpreted code, error in fun
     ?line F3 = spawn_eval(fun() -> ?IM:give_me_a_bad_fun() end),
-    ?line {'EXIT',{snape,[{?IM,_FunName,_}|_]}} =
+    ?line {'EXIT',{snape,[{?IM,_FunName,_,_}|_]}} =
 	spawn_eval(fun() -> F3(snape) end),
 
     %% Called from within interpreted code
     ?line perfectly_alright = spawn_eval(fun() -> ?IM:do_apply(F1) end),
 
     %% Called from within interpreted code, badarity
-    ?line {'EXIT',{{badarity,{F1,[snape]}},[{?IM,do_apply,_}|_]}} =
+    ?line {'EXIT',{{badarity,{F1,[snape]}},[{?IM,do_apply,_,_}|_]}} =
 	spawn_eval(fun() -> ?IM:do_apply(F1, snape) end),
 
     %% Called from within interpreted code, error in fun
-    ?line {'EXIT',{snape,[{?IM,_FunName,_}|_]}} =
+    ?line {'EXIT',{snape,[{?IM,_FunName,_,_}|_]}} =
 	spawn_eval(fun() -> ?IM:do_apply(F3, snape) end),
 
     %% Try some more complex funs.
@@ -239,11 +239,11 @@ apply_uninterpreted_fun(Config) when is_list(Config) ->
 	spawn_eval(fun() -> ?IM:do_apply(F1, any_arg) end),
 
     %% Badarity (evaluated in dbg_debugged, which calls erlang:apply/2)
-    ?line {'EXIT',{{badarity,{F1,[]}},[{erlang,apply,_}|_]}} =
+    ?line {'EXIT',{{badarity,{F1,[]}},[{erlang,apply,_,_}|_]}} =
 	spawn_eval(fun() -> ?IM:do_apply(F1) end),
 
     %% Error in fun
-    ?line {'EXIT',{snape,[{?MODULE,_FunName,_}|_]}} =
+    ?line {'EXIT',{snape,[{?MODULE,_FunName,_,_}|_]}} =
 	spawn_eval(fun() -> ?IM:do_apply(F1, snape) end),
 
     ok.
@@ -277,6 +277,37 @@ applier(M, F, A) ->
     io:format("~p:~p(~p) => ~p\n", [M,F,A,Res]),
     Res.
 
+stacktrace(Config) when is_list(Config) ->
+    ?line {done,Stk} = do_eval(Config, stacktrace),
+    ?line 13 = length(Stk),
+    ?line OldStackTraceFlag = int:stack_trace(),
+    ?line int:stack_trace(no_tail),
+    try
+	?line Res = spawn_eval(fun() -> stacktrace:stacktrace() end),
+	?line io:format("\nInterpreted (no_tail):\n~p", [Res]),
+	?line {done,Stk} = Res
+	after
+	    ?line int:stack_trace(OldStackTraceFlag)
+	end,
+    ok.
+
+
+do_eval(Config, Mod) ->
+    ?line DataDir = ?config(data_dir, Config),
+    ?line ok = file:set_cwd(DataDir),
+
+    ?line {ok,Mod} = compile:file(Mod, [report,debug_info]),
+    ?line {module,Mod} = code:load_file(Mod),
+    ?line CompiledRes = Mod:Mod(),
+    ?line ok = io:format("Compiled:\n~p", [CompiledRes]),
+    io:nl(),
+
+    ?line {module,Mod} = int:i(Mod),
+    ?line IntRes = Mod:Mod(),
+    ?line ok = io:format("Interpreted:\n~p", [IntRes]),
+
+    ?line CompiledRes = IntRes.
+
 %%
 %% Evaluate in another process, to prevent the test_case process to become
 %% interpreted.
diff --git a/lib/debugger/test/int_eval_SUITE_data/my_int_eval_module.erl b/lib/debugger/test/int_eval_SUITE_data/my_int_eval_module.erl
index 997ee6e17d..90f83e80e8 100644
--- a/lib/debugger/test/int_eval_SUITE_data/my_int_eval_module.erl
+++ b/lib/debugger/test/int_eval_SUITE_data/my_int_eval_module.erl
@@ -117,7 +117,7 @@ more_nocatch(Fun) ->
 %% External calls.
 
 external_call_test(Data) ->
-    {'EXIT',{undef,[{?MODULE,not_exported,[42,Data]}|_]}} =
+    {'EXIT',{undef,[{?MODULE,not_exported,[42,Data],_}|_]}} =
 	(catch ?MODULE:not_exported(42, Data)),
     {yes,Data} = i_am_exported(Data),
     {yes,Data} = ?MODULE:i_am_exported(Data),
@@ -127,7 +127,7 @@ external_call_test(Data) ->
     {ok,Data,[a,b]} = not_exported(Data, [a,b]),
     {yes,Data} = i_am_exported(Data),
     {ok,Data,[a,b]} = not_exported(Data, [a,b]),
-    {'EXIT',{undef,[{?MODULE,not_exported,[7,Data]}|_]}} =
+    {'EXIT',{undef,[{?MODULE,not_exported,[7,Data],_}|_]}} =
 	(catch ?MODULE:not_exported(7, Data)),
     {yes,Data} = ?MODULE:i_am_exported(Data),
     ok.
diff --git a/lib/debugger/test/int_eval_SUITE_data/stacktrace.erl b/lib/debugger/test/int_eval_SUITE_data/stacktrace.erl
new file mode 100644
index 0000000000..3380178fdc
--- /dev/null
+++ b/lib/debugger/test/int_eval_SUITE_data/stacktrace.erl
@@ -0,0 +1,130 @@
+-module(stacktrace).
+-export([?MODULE/0]).
+
+?MODULE() ->
+    OldDepth = erlang:system_flag(backtrace_depth, 32),
+    done = (catch do_try()),
+    Stk = trim(erlang:get_stacktrace()),
+    erlang:system_flag(backtrace_depth, OldDepth),
+    {done,Stk}.
+
+trim([{int_eval_SUITE,_,_,_}|_]) ->
+    [];
+trim([H|T]) ->
+    [H|trim(T)];
+trim([]) -> [].
+
+do_try() ->
+    try
+	0 = id(42)
+    catch
+	error:{badmatch,42} ->
+	    do_try2()				%Tail-recursive
+    end.
+
+do_try2() ->
+    try
+	0 = id(42)
+    catch
+	error:{badmatch,42} ->
+	    do_try3()				%Not tail-recursive
+    end,
+    ?LINE.
+
+do_try3() ->
+    try id(42) of
+	42 -> do_try4()				%Tail-recursive
+    catch
+	error:ignore ->				%Should never catch
+	    ?LINE
+    end.
+
+do_try4() ->
+    try
+	do_recv()				%Not tail-recursive
+    catch
+	error:ignore ->				%Should never catch
+	    ?LINE
+    end.
+
+do_recv() ->
+    self() ! x,
+    receive
+	x -> do_recv2()				%Not tail-recursive
+    end,
+    ?LINE.
+
+do_recv2() ->
+    self() ! y,
+    receive
+	y -> do_recv3()				%Tail-recursive
+    end.
+
+do_recv3() ->
+    receive
+	after 0 -> do_recv4()			%Tail-recursive
+    end.
+
+do_recv4() ->
+    receive
+	after 0 -> do_if(true)			%Not tail-recursive
+    end,
+    ?LINE.
+
+do_if(Bool) ->
+    if
+	Bool -> do_if2(Bool)			%Tail-recursive
+    end.
+
+do_if2(Bool) ->
+    if
+	Bool -> do_case(Bool)			%Not tail-recursive
+    end,
+    ?LINE.
+
+
+do_case(Bool) ->
+    case Bool of
+	true -> do_case2(Bool)			%Tail-recursive
+    end.
+
+do_case2(Bool) ->
+    case Bool of
+	true -> do_fun(Bool)			%Not tail-recursive
+    end,
+    ?LINE.
+
+do_fun(Bool) ->
+    F = fun(true) ->
+		do_fun2(Bool)			%Tail-recursive
+	end,
+    F(Bool).					%Tail-recursive
+
+do_fun2(Bool) ->
+    F = fun(true) ->
+		cons(Bool)			%Tail-recursive
+	end,
+    F(Bool),					%Not tail-recursive
+    ?LINE.
+
+cons(Bool) ->
+    [Bool|tuple()].
+
+tuple() ->
+    {ok,op()}.
+
+op() ->
+    1 + lc().
+
+lc() ->
+    [done() || true].
+
+done() ->
+    tail(100),
+    throw(done).
+
+tail(0) -> ok;
+tail(N) -> tail(N-1).
+
+id(I) ->
+    I.
diff --git a/lib/debugger/test/lc_SUITE.erl b/lib/debugger/test/lc_SUITE.erl
index 92a03ef58e..2f05eb7fca 100644
--- a/lib/debugger/test/lc_SUITE.erl
+++ b/lib/debugger/test/lc_SUITE.erl
@@ -17,21 +17,22 @@
 %% %CopyrightEnd%
 %%
 
-%%
 -module(lc_SUITE).
 
--author('[email protected]').
+%% Copied from lc_SUITE in the compiler application.
+
 -export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
 	 init_per_testcase/2,end_per_testcase/2,
 	 init_per_suite/1,end_per_suite/1,
-	 basic/1]).
+	 basic/1,deeply_nested/1,no_generator/1,
+	 empty_generator/1]).
 
 -include_lib("test_server/include/test_server.hrl").
 
 suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
-    cases().
+    [basic, deeply_nested, no_generator, empty_generator].
 
 groups() -> 
     [].
@@ -42,10 +43,6 @@ init_per_group(_GroupName, Config) ->
 end_per_group(_GroupName, Config) ->
     Config.
 
-
-cases() -> 
-    [basic].
-
 init_per_testcase(_Case, Config) ->
     test_lib:interpret(?MODULE),
     Dog = test_server:timetrap(?t:minutes(1)),
@@ -64,7 +61,7 @@ init_per_suite(Config) when is_list(Config) ->
 end_per_suite(Config) when is_list(Config) ->
     ok.
 
-basic(Config) when list(Config) ->
+basic(Config) when is_list(Config) ->
     ?line L0 = lists:seq(1, 10),
     ?line L1 = my_map(fun(X) -> {x,X} end, L0),
     ?line L1 = [{x,X} || X <- L0],
@@ -73,16 +70,116 @@ basic(Config) when list(Config) ->
     ?line [4,5,6] = [X || X <- L0, X > 3, X < 7],
     ?line [] = [X || X <- L0, X > 32, X < 7],
     ?line [1,3,5,7,9] = [X || X <- L0, odd(X)],
+    ?line [2,4,6,8,10] = [X || X <- L0, not odd(X)],
+    ?line [1,3,5,9] = [X || X <- L0, odd(X), X =/= 7],
+    ?line [2,4,8,10] = [X || X <- L0, not odd(X), X =/= 6],
+
+    %% Append is specially handled.
+    ?line [1,3,5,9,2,4,8,10] = [X || X <- L0, odd(X), X =/= 7] ++
+	[X || X <- L0, not odd(X), X =/= 6],
+
+    %% Guards BIFs are evaluated in guard context. Weird, but true.
+    ?line [{a,b,true},{x,y,true,true}] = [X || X <- tuple_list(), element(3, X)],
+
+    %% Filter expressions with andalso/orelse.
+    ?line "abc123" = alphanum("?abc123.;"),
 
     %% Error cases.
-    ?line [] = [X || X <- L1, X+1 < 2],
     ?line [] = [{xx,X} || X <- L0, element(2, X) == no_no_no],
-    ?line {'EXIT',_}  = (catch [X || X <- L1, odd(X)]),
+    ?line {'EXIT',_} = (catch [X || X <- L1, list_to_atom(X) == dum]),
+    ?line [] = [X || X <- L1, X+1 < 2],
+    ?line {'EXIT',_} = (catch [X || X <- L1, odd(X)]),
 
+    %% A bad generator has a different exception compared to BEAM.
+    ?line {'EXIT',{{bad_generator,x},_}} = (catch [E || E <- id(x)]),
     ok.
 
+tuple_list() ->
+    [{a,b,true},[a,b,c],glurf,{a,b,false,xx},{a,b},{x,y,true,true},{a,b,d,ddd}].
+
 my_map(F, L) ->
     [F(X) || X <- L].
 
 odd(X) ->
     X rem 2 == 1.
+
+alphanum(Str) ->
+    [C || C <- Str, ((C >= $0) andalso (C =< $9))
+	      orelse ((C >= $a) andalso (C =< $z))
+	      orelse ((C >= $A) andalso (C =< $Z))].
+
+deeply_nested(Config) when is_list(Config) ->
+    [[99,98,97,96,42,17,1764,12,11,10,9,8,7,6,5,4,3,7,2,1]] =  deeply_nested_1(),
+    ok.
+
+deeply_nested_1() ->
+    %% This used to compile really, really SLOW before R11B-1...
+    [[X1,X2,X3,X4,X5,X6,X7(),X8,X9,X10,X11,X12,X13,X14,X15,X16,X17,X18(),X19,X20] ||
+        X1 <- [99],X2 <- [98],X3 <- [97],X4 <- [96],X5 <- [42],X6 <- [17],
+	X7 <- [fun() -> X5*X5 end],X8 <- [12],X9 <- [11],X10 <- [10],
+        X11 <- [9],X12 <- [8],X13 <- [7],X14 <- [6],X15 <- [5],
+	X16 <- [4],X17 <- [3],X18 <- [fun() -> X16+X17 end],X19 <- [2],X20 <- [1]].
+
+no_generator(Config) when is_list(Config) ->
+    ?line Seq = lists:seq(-10, 17),
+    ?line [no_gen_verify(no_gen(A, B), A, B) || A <- Seq, B <- Seq],
+
+    %% Literal expression, for coverage.
+    ?line [a] = [a || true],
+    ?line [a,b,c] = [a || true] ++ [b,c],
+    ok.
+
+no_gen(A, B) ->
+    [{A,B} || A+B =:= 0] ++
+	[{A,B} || A*B =:= 0] ++
+	[{A,B} || A rem B =:= 3] ++
+	[{A,B} || A =:= B] ++
+	[{one_more,A,B} || no_gen_one_more(A, B)] ++
+	[A || A =:= 1] ++
+	[A || A =:= 2] ++
+	[A || A =:= 3] ++
+	[A || A =:= 4] ++
+	[A || A =:= 5] ++
+	[A || A =:= 6] ++
+	[A || A =:= 7] ++
+	[A || A =:= 8] ++
+	[A || A =:= 9] ++
+	[B || B =:= 1] ++
+	[B || B =:= 2] ++
+	[B || B =:= 3] ++
+	[B || B =:= 4] ++
+	[B || B =:= 5] ++
+	[B || B =:= 6] ++
+	[B || B =:= 7] ++
+	[B || B =:= 8] ++
+	[B || B =:= 9].
+
+no_gen_verify(Res, A, B) ->
+    Pair = {A,B},
+    ShouldBe = no_gen_eval(fun() -> A+B =:= 0 end, Pair) ++
+	no_gen_eval(fun() -> A*B =:= 0 end, Pair) ++
+	no_gen_eval(fun() -> B =/= 0 andalso A rem B =:= 3 end, Pair) ++
+	no_gen_eval(fun() -> A =:= B end, Pair) ++
+	no_gen_eval(fun() -> A + 1 =:= B end, {one_more,A,B}) ++
+	no_gen_eval(fun() -> 1 =< A andalso A =< 9 end, A) ++
+	no_gen_eval(fun() -> 1 =< B andalso B =< 9 end, B),
+    case Res of
+	ShouldBe -> ok;
+	_ ->
+	    io:format("A = ~p; B = ~p; Expected = ~p, actual = ~p", [A,B,ShouldBe,Res]),
+	    ?t:fail()
+    end.
+
+no_gen_eval(Fun, Res) ->
+    case Fun() of
+	true -> [Res];
+	false -> []
+    end.
+
+no_gen_one_more(A, B) -> A + 1 =:= B.
+
+empty_generator(Config) when is_list(Config) ->
+    ?line [] = [X || {X} <- [], (false or (X/0 > 3))],
+    ok.
+
+id(I) -> I.
diff --git a/lib/debugger/test/line_number_SUITE.erl b/lib/debugger/test/line_number_SUITE.erl
new file mode 100644
index 0000000000..d1f56d3493
--- /dev/null
+++ b/lib/debugger/test/line_number_SUITE.erl
@@ -0,0 +1,220 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1999-2011. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+-module(line_number_SUITE).
+
+-export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
+	 init_per_suite/1,end_per_suite/1,
+	 line_numbers/1]).
+-export([crash/1]).
+
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() ->
+    cases().
+
+groups() ->
+    [].
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+cases() ->
+    [line_numbers].
+
+init_per_testcase(_Case, Config) ->
+    test_lib:interpret(?MODULE),
+    Dog = test_server:timetrap(?t:minutes(1)),
+    [{watchdog,Dog}|Config].
+
+end_per_testcase(_Case, Config) ->
+    Dog = ?config(watchdog, Config),
+    ?t:timetrap_cancel(Dog),
+    ok.
+
+init_per_suite(Config) when is_list(Config) ->
+    ?line test_lib:interpret(?MODULE),
+    ?line true = lists:member(?MODULE, int:interpreted()),
+    Config.
+
+end_per_suite(Config) when is_list(Config) ->
+    ok.
+
+
+
+
+
+%%
+%% === Make sure that this is always line 70 ===
+%%
+line1(Tag, X) ->				%Line 72
+    case Tag of					%Line 73
+	a ->
+	    Y = X + 1,				%Line 75
+	    Res = id({ok,Y}),			%Line 76
+	    ?MODULE:crash({ok,42} = Res);	%Line 77
+	b ->
+	    x = id(x),				%Line 79
+	    ok					%Line 80
+    end.					%Line 81
+
+crash(_) ->					%Line 83
+    erlang:error(crash).			%Line 84
+
+close_calls(Where) ->				%Line 86
+    put(where_to_crash, Where),			%Line 87
+    try
+	call1(),				%Line 89
+	call2(),				%Line 90
+	call3(),				%Line 91
+	no_crash				%Line 92
+    catch error:crash ->
+	    erlang:get_stacktrace()		%Line 94
+    end.					%Line 95
+
+call1() ->					%Line 97
+    maybe_crash(call1),				%Line 98
+    ok.						%Line 99
+
+call2() ->					%Line 101
+    maybe_crash(call2),				%Line 102
+    ok.						%Line 103
+
+call3() ->					%Line 105
+    maybe_crash(call3),				%Line 106
+    ok.						%Line 107
+
+maybe_crash(Name) ->				%Line 109
+    case get(where_to_crash) of			%Line 110
+	Name ->
+	    erlang:error(crash);		%Line 112
+	_ ->
+	    ok					%Line 114
+    end.					%Line 115
+
+build_binary1(Size) ->				%Line 117
+    id(42),					%Line 118
+    <<0:Size>>.					%Line 119
+
+build_binary2(Size, Bin) ->			%Line 121
+    id(0),					%Line 122
+    <<7:Size,Bin/binary>>.			%Line 123
+
+do_call_abs(x, Arg) ->				%Line 125
+    abs(Arg).					%Line 126
+
+do_call_unsafe_bif(x, Arg) ->			%Line 128
+    link(Arg).					%Line 129
+
+
+line_numbers(Config) when is_list(Config) ->
+    File = ?MODULE_STRING ++ ".erl",
+    {'EXIT',{{case_clause,bad_tag},
+	     [{?MODULE,line1,2,
+	       [{file,File},{line,73}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch line1(bad_tag, 0)),
+    {'EXIT',{badarith,
+	     [{?MODULE,line1,2,
+	       [{file,File},{line,75}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch line1(a, not_an_integer)),
+    {'EXIT',{{badmatch,{ok,1}},
+	     [{?MODULE,line1,2,
+	       [{file,File},{line,77}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch line1(a, 0)),
+    {'EXIT',{crash,
+	     [{?MODULE,crash,1,
+	       [{file,File},{line,84}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch line1(a, 41)),
+
+    [{?MODULE,maybe_crash,1,[{file,File},{line,112}]},
+     {?MODULE,call1,0,[{file,File},{line,98}]},
+     {?MODULE,close_calls,1,[{file,File},{line,89}]},
+     {?MODULE,line_numbers,1,[{file,File},{line,_}]}|_] =
+	close_calls(call1),
+    [{?MODULE,maybe_crash,1,[{file,File},{line,112}]},
+     {?MODULE,call2,0,[{file,File},{line,102}]},
+     {?MODULE,close_calls,1,[{file,File},{line,90}]},
+     {?MODULE,line_numbers,1,[{file,File},{line,_}]}|_] =
+	close_calls(call2),
+    [{?MODULE,maybe_crash,1,[{file,File},{line,112}]},
+     {?MODULE,call3,0,[{file,File},{line,106}]},
+     {?MODULE,close_calls,1,[{file,File},{line,91}]},
+     {?MODULE,line_numbers,1,[{file,File},{line,_}]}|_] =
+	close_calls(call3),
+    no_crash = close_calls(other),
+
+    <<0,0>> = build_binary1(16),
+    {'EXIT',{badarg,
+	     [{?MODULE,build_binary1,1,
+	       [{file,File},{line,119}]},
+	      {?MODULE,line_numbers,1,
+	       [{file,ModFile},{line,_}]}|_]}} =
+	(catch build_binary1(bad_size)),
+
+    <<7,1,2,3>> = build_binary2(8, <<1,2,3>>),
+    {'EXIT',{badarg,
+	     [{?MODULE,build_binary2,2,
+	       [{file,File},{line,123}]},
+	      {?MODULE,line_numbers,1,
+	       [{file,ModFile},{line,_}]}|_]}} =
+	(catch build_binary2(bad_size, <<>>)),
+    {'EXIT',{badarg,
+	     [%% Beam has an extra here:
+	      %%   {erlang,bit_size,[bad_binary],[]}
+	      %% Since this is an artifact of the implementation,
+	      %% we don't attempt to mimic it in the debugger.
+	      {?MODULE,build_binary2,2,
+	       [{file,File},{line,123}]},
+	      {?MODULE,line_numbers,1,
+	       [{file,ModFile},{line,_}]}|_]}} =
+	(catch build_binary2(8, bad_binary)),
+
+    {'EXIT',{function_clause,
+	     [{?MODULE,do_call_abs,[y,y],
+	       [{file,File},{line,125}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch do_call_abs(y, y)),
+    {'EXIT',{badarg,
+	     [{erlang,abs,[[]],[]},
+	      {?MODULE,do_call_abs,2,
+	       [{file,File},{line,126}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch do_call_abs(x, [])),
+
+    {'EXIT',{badarg,
+	     [{erlang,link,[[]],[]},
+	      {?MODULE,do_call_unsafe_bif,2,
+	       [{file,File},{line,129}]},
+	      {?MODULE,line_numbers,1,_}|_]}} =
+	(catch do_call_unsafe_bif(x, [])),
+
+    ok.
+
+id(I) ->
+    I.
diff --git a/lib/debugger/test/test_lib.erl b/lib/debugger/test/test_lib.erl
index 541375e64a..5e4ac7f164 100644
--- a/lib/debugger/test/test_lib.erl
+++ b/lib/debugger/test/test_lib.erl
@@ -22,7 +22,7 @@
 
 -export([interpret/1]).
 
-interpret(Mod) when atom(Mod) ->
+interpret(Mod) when is_atom(Mod) ->
     case lists:member(Mod, int:interpreted()) of
 	true -> ok;
 	false -> {module,Mod} = i:ii(Mod)
diff --git a/lib/debugger/test/trycatch_SUITE.erl b/lib/debugger/test/trycatch_SUITE.erl
index a87c5db138..470d46d915 100644
--- a/lib/debugger/test/trycatch_SUITE.erl
+++ b/lib/debugger/test/trycatch_SUITE.erl
@@ -318,17 +318,18 @@ eclectic(Conf) when is_list(Conf) ->
     V = {make_ref(),3.1415926535,[[]|{}]},
     ?line {{value,{value,V},V},V} =
 	eclectic_1({foo,{value,{value,V}}}, undefined, {value,V}),
-    ?line {{'EXIT',{V,[{?MODULE,foo,_}|_]}},V} =
+    ?line {{'EXIT',{V,[{?MODULE,foo,_,_}|_]}},V} =
 	eclectic_1({catch_foo,{error,V}}, undefined, {value,V}),
     ?line {{error,{exit,V},{'EXIT',V}},V} =
 	eclectic_1({foo,{error,{exit,V}}}, error, {value,V}),
-    ?line {{value,{value,V},V},{'EXIT',{badarith,[{?MODULE,my_add,_}|_]}}} =
+    ?line {{value,{value,V},V},{'EXIT',{badarith,[{?MODULE,my_add,_,_}|_]}}} =
 	eclectic_1({foo,{value,{value,V}}}, undefined, {'add',{0,a}}),
     ?line {{'EXIT',V},V} =
 	eclectic_1({catch_foo,{exit,V}}, undefined, {throw,V}),
-    ?line {{error,{'div',{1,0}},{'EXIT',{badarith,[{?MODULE,my_div,_}|_]}}}, {'EXIT',V}} =
+    ?line {{error,{'div',{1,0}},{'EXIT',{badarith,[{?MODULE,my_div,_,_}|_]}}},
+	   {'EXIT',V}} =
 	eclectic_1({foo,{error,{'div',{1,0}}}}, error, {exit,V}),
-    ?line {{{error,V},{'EXIT',{V,[{?MODULE,foo,_}|_]}}},{'EXIT',V}} =
+    ?line {{{error,V},{'EXIT',{V,[{?MODULE,foo,_,_}|_]}}},{'EXIT',V}} =
 	eclectic_1({catch_foo,{throw,{error,V}}}, undefined, {exit,V}),
     %%
     ?line {{value,{value,{value,V},V}},V} =
@@ -337,15 +338,15 @@ eclectic(Conf) when is_list(Conf) ->
 	eclectic_2({throw,{value,V}}, throw, {value,V}),
     ?line {{caught,{'EXIT',V}},undefined} =
 	eclectic_2({value,{value,V}}, undefined, {exit,V}),
-    ?line {{caught,{'EXIT',{V,[{?MODULE,foo,_}|_]}}},undefined} =
+    ?line {{caught,{'EXIT',{V,[{?MODULE,foo,_,_}|_]}}},undefined} =
 	eclectic_2({error,{value,V}}, throw, {error,V}),
-    ?line {{caught,{'EXIT',{badarg,[{erlang,abs,[V]}|_]}}},V} =
+    ?line {{caught,{'EXIT',{badarg,[{erlang,abs,[V],_}|_]}}},V} =
 	eclectic_2({value,{'abs',V}}, undefined, {value,V}),
-    ?line {{caught,{'EXIT',{badarith,[{?MODULE,my_add,_}|_]}}},V} =
+    ?line {{caught,{'EXIT',{badarith,[{?MODULE,my_add,_,_}|_]}}},V} =
 	eclectic_2({exit,{'add',{0,a}}}, exit, {value,V}),
     ?line {{caught,{'EXIT',V}},undefined} =
 	eclectic_2({value,{error,V}}, undefined, {exit,V}),
-    ?line {{caught,{'EXIT',{V,[{?MODULE,foo,_}|_]}}},undefined} =
+    ?line {{caught,{'EXIT',{V,[{?MODULE,foo,_,_}|_]}}},undefined} =
 	eclectic_2({throw,{'div',{1,0}}}, throw, {error,V}),
     ok.
 
diff --git a/lib/docbuilder/src/docb_main.erl b/lib/docbuilder/src/docb_main.erl
index 4f5f035a65..c20cfc8e67 100644
--- a/lib/docbuilder/src/docb_main.erl
+++ b/lib/docbuilder/src/docb_main.erl
@@ -436,11 +436,11 @@ transform(From, To, Opts, File, Tree) ->
     case catch Filter:transform(File, Tree, Opts) of
 
 	%% R5C
-	{'EXIT', {undef, [{Filter, transform, [File, Tree, Opts]}|_]}}->
+	{'EXIT', {undef, [{Filter, transform, [File, Tree, Opts],_}|_]}}->
 	    %% No transformation defined
 	    finish_transform(Tree, File, Opts, Filter);
 	
-	{'EXIT', {undef, {Filter, transform, [File, Tree, Opts]}}} ->
+	{'EXIT', {undef, {Filter, transform, [File, Tree, Opts],_}}} ->
 	    %% No transformation defined
 	    finish_transform(Tree, File, Opts, Filter);
 
@@ -507,16 +507,16 @@ pp({Tag, Optional, Args}, TagPath, Level, Filter, Opts) ->
     Rule_3_result =
 	case catch Filter:rule(TagPath1, {Level,Optional1,Args},Opts) of
 	    %% R5C
-	    {'EXIT', {undef, [{_, rule, _}|_]}} -> % No rule/3 defined
+	    {'EXIT', {undef, [{_, rule, _, _}|_]}} -> % No rule/3 defined
 		failed;
 
-	    {'EXIT', {undef, {_, rule, _}}} -> % No rule/3 defined
+	    {'EXIT', {undef, {_, rule, _, _}}} -> % No rule/3 defined
 		failed;
 	    %% R5C
-	    {'EXIT', {function_clause, [{_, rule, _}|_]}} -> % No MATCHING rule/3
+	    {'EXIT', {function_clause, [{_, rule, _, _}|_]}} -> % No MATCHING rule/3
 		failed;
 
-	    {'EXIT', {function_clause, {_, rule, _}}} -> % No MATCHING rule/3
+	    {'EXIT', {function_clause, {_, rule, _, _}}} -> % No MATCHING rule/3
 		failed;
 
 	    {'EXIT', What} ->
diff --git a/lib/hipe/cerl/erl_bif_types.erl b/lib/hipe/cerl/erl_bif_types.erl
index 64a695129b..606fd307ea 100644
--- a/lib/hipe/cerl/erl_bif_types.erl
+++ b/lib/hipe/cerl/erl_bif_types.erl
@@ -795,7 +795,8 @@ type(erlang, get_module_info, 2, Xs) ->
 	     end
 	 end);
 type(erlang, get_stacktrace, 0, _) ->
-  t_list(t_tuple([t_atom(), t_atom(), t_sup([t_arity(), t_list()])]));
+  t_list(t_tuple([t_atom(), t_atom(), t_sup([t_arity(), t_list()]),
+		  t_list()]));
 type(erlang, group_leader, 0, _) -> t_pid();
 type(erlang, group_leader, 2, Xs) ->
   strict(arg_types(erlang, group_leader, 2), Xs,
@@ -3707,7 +3708,10 @@ arg_types(erlang, purge_module, 1) ->
 arg_types(erlang, put, 2) ->
   [t_any(), t_any()];
 arg_types(erlang, raise, 3) ->
-  [t_raise_errorclass(), t_any(), type(erlang, get_stacktrace, 0, [])];
+  OldStyleType = t_list(t_tuple([t_atom(), t_atom(),
+				 t_sup([t_arity(), t_list()])])),
+  NewStyleType = type(erlang, get_stacktrace, 0, []),
+  [t_raise_errorclass(), t_any(), t_sup(OldStyleType, NewStyleType)];
 arg_types(erlang, read_timer, 1) ->
   [t_reference()];
 arg_types(erlang, ref_to_list, 1) ->
diff --git a/lib/hipe/icode/hipe_beam_to_icode.erl b/lib/hipe/icode/hipe_beam_to_icode.erl
index d7eb035551..f557d3419e 100644
--- a/lib/hipe/icode/hipe_beam_to_icode.erl
+++ b/lib/hipe/icode/hipe_beam_to_icode.erl
@@ -281,10 +281,14 @@ needs_redtest(Leafness) ->
 %%-----------------------------------------------------------------------
 
 %%--- label & func_info combo ---
+trans_fun([{label,_}=F,{func_info,_,_,_}=FI|Instructions], Env) ->
+  %% Handle old code without a line instruction.
+  trans_fun([F,{line,[]},FI|Instructions], Env);
 trans_fun([{label,B},{label,_},
 	   {func_info,M,F,A},{label,L}|Instructions], Env) ->
   trans_fun([{label,B},{func_info,M,F,A},{label,L}|Instructions], Env);
 trans_fun([{label,B},
+	   {line,_},
 	   {func_info,{atom,_M},{atom,_F},_A},
 	   {label,L}|Instructions], Env) ->
   %% Emit code to handle function_clause errors.  The BEAM test instructions
@@ -1142,6 +1146,11 @@ trans_fun([{trim,N,NY}|Instructions], Env) ->
   Moves = trans_trim(N, NY),
   Moves ++ trans_fun(Instructions, Env);
 %%--------------------------------------------------------------------
+%% New line/1 instruction in R15.
+%%--------------------------------------------------------------------
+trans_fun([{line,_}|Instructions], Env) ->
+  trans_fun(Instructions,Env);
+%%--------------------------------------------------------------------
 %%--- ERROR HANDLING ---
 %%--------------------------------------------------------------------
 trans_fun([X|_], _) ->
@@ -1869,6 +1878,8 @@ patch_make_funs([], FunIndex, Acc) ->
 
 find_mfa([{label,_}|Code]) ->
   find_mfa(Code);
+find_mfa([{line,_}|Code]) ->
+  find_mfa(Code);
 find_mfa([{func_info,{atom,M},{atom,F},A}|_]) 
   when is_atom(M), is_atom(F), is_integer(A), 0 =< A, A =< 255 ->
   {M, F, A}.
diff --git a/lib/kernel/src/error_handler.erl b/lib/kernel/src/error_handler.erl
index e1f99bf417..a67b11a888 100644
--- a/lib/kernel/src/error_handler.erl
+++ b/lib/kernel/src/error_handler.erl
@@ -88,12 +88,12 @@ int() -> int.
 -spec crash(atom(), [term()]) -> no_return().
 
 crash(Fun, Args) ->
-    crash({Fun,Args}).
+    crash({Fun,Args,[]}).
 
 -spec crash(atom(), atom(), arity()) -> no_return().
 
 crash(M, F, A) ->
-    crash({M,F,A}).
+    crash({M,F,A,[]}).
 
 -spec crash(tuple()) -> no_return().
 
@@ -101,7 +101,8 @@ crash(Tuple) ->
     try erlang:error(undef)
     catch
 	error:undef ->
-	    erlang:raise(error, undef, [Tuple|tl(erlang:get_stacktrace())])
+	    Stk = [Tuple|tl(erlang:get_stacktrace())],
+	    erlang:raise(error, undef, Stk)
     end.
 
 %% If the code_server has not been started yet dynamic code loading
@@ -127,7 +128,7 @@ ensure_loaded(Module) ->
 -spec stub_function(atom(), atom(), [_]) -> no_return().
 
 stub_function(Mod, Func, Args) ->
-    exit({undef,[{Mod,Func,Args}]}).
+    exit({undef,[{Mod,Func,Args,[]}]}).
 
 check_inheritance(Module, Args) ->
     Attrs = erlang:get_module_info(Module, attributes),
diff --git a/lib/kernel/src/file.erl b/lib/kernel/src/file.erl
index 5e4e1b0ba8..706c60caaf 100644
--- a/lib/kernel/src/file.erl
+++ b/lib/kernel/src/file.erl
@@ -1163,7 +1163,7 @@ path_open_first([Path|Rest], Name, Mode, LastError) ->
 	{error, _} = Error ->
 	    Error;
 	FilePath ->
-	    FileName = filename:join(FilePath, Name),
+	    FileName = fname_join(FilePath, Name),
 	    case open(FileName, Mode) of
 		{ok, Fd} ->
 		    {ok, Fd, FileName};
@@ -1176,6 +1176,11 @@ path_open_first([Path|Rest], Name, Mode, LastError) ->
 path_open_first([], _Name, _Mode, LastError) ->
     {error, LastError}.
 
+fname_join(".", Name) ->
+    Name;
+fname_join(Dir, Name) ->
+    filename:join(Dir, Name).
+
 %%%-----------------------------------------------------------------
 %%% Utility functions.
 
diff --git a/lib/kernel/test/code_SUITE.erl b/lib/kernel/test/code_SUITE.erl
index 3ad49254f1..531ce780a9 100644
--- a/lib/kernel/test/code_SUITE.erl
+++ b/lib/kernel/test/code_SUITE.erl
@@ -984,9 +984,9 @@ purge_stacktrace(Config) when is_list(Config) ->
 	error:function_clause ->
 	    ?line code:load_file(code_b_test),
 	    ?line case erlang:get_stacktrace() of
-		      [{?MODULE,_,[a]},
-		       {code_b_test,call,2},
-		       {?MODULE,purge_stacktrace,1}|_] ->
+		      [{?MODULE,_,[a],_},
+		       {code_b_test,call,2,_},
+		       {?MODULE,purge_stacktrace,1,_}|_] ->
 			  ?line false = code:purge(code_b_test),
 			  ?line [] = erlang:get_stacktrace()
 		  end
@@ -996,8 +996,8 @@ purge_stacktrace(Config) when is_list(Config) ->
 	error:function_clause ->
 	    ?line code:load_file(code_b_test),
 	    ?line case erlang:get_stacktrace() of
-		      [{code_b_test,call,[nofun,2]},
-		       {?MODULE,purge_stacktrace,1}|_] ->
+		      [{code_b_test,call,[nofun,2],_},
+		       {?MODULE,purge_stacktrace,1,_}|_] ->
 			  ?line false = code:purge(code_b_test),
 			  ?line [] = erlang:get_stacktrace()
 		  end
@@ -1008,8 +1008,8 @@ purge_stacktrace(Config) when is_list(Config) ->
 	error:badarg ->
 	    ?line code:load_file(code_b_test),
 	    ?line case erlang:get_stacktrace() of
-		      [{code_b_test,call,Args},
-		       {?MODULE,purge_stacktrace,1}|_] ->
+		      [{code_b_test,call,Args,_},
+		       {?MODULE,purge_stacktrace,1,_}|_] ->
 			  ?line false = code:purge(code_b_test),
 			  ?line [] = erlang:get_stacktrace()
 		  end
@@ -1470,7 +1470,7 @@ do_on_load_error(ReturnValue) ->
     ?line ErrorPid ! ReturnValue,
     receive
 	{'DOWN',Ref,process,_,Exit} ->
-	    ?line {undef,[{on_load_error,main,[]}|_]} = Exit
+	    ?line {undef,[{on_load_error,main,[],_}|_]} = Exit
     end.
 
 native_early_modules(suite) -> [];
diff --git a/lib/kernel/test/zlib_SUITE.erl b/lib/kernel/test/zlib_SUITE.erl
index 9eb84c9167..d367f3958a 100644
--- a/lib/kernel/test/zlib_SUITE.erl
+++ b/lib/kernel/test/zlib_SUITE.erl
@@ -42,8 +42,8 @@
 		end
 	end()).
 
--define(BARG, {'EXIT',{badarg,[{zlib,_,_}|_]}}).
--define(DATA_ERROR, {'EXIT',{data_error,[{zlib,_,_}|_]}}).
+-define(BARG, {'EXIT',{badarg,[{zlib,_,_,_}|_]}}).
+-define(DATA_ERROR, {'EXIT',{data_error,[{zlib,_,_,_}|_]}}).
 
 init_per_testcase(_Func, Config) ->
     Dog = test_server:timetrap(test_server:seconds(60)),
diff --git a/lib/mnesia/src/mnesia_lib.erl b/lib/mnesia/src/mnesia_lib.erl
index 7e926a6258..775d370d0f 100644
--- a/lib/mnesia/src/mnesia_lib.erl
+++ b/lib/mnesia/src/mnesia_lib.erl
@@ -413,7 +413,7 @@ pr_other(Var, Other) ->
 	    [self(), process_info(self(), registered_name),
 	     Var, Other, Why]),
     case Other of
-	{badarg, [{ets, lookup_element, _}|_]} ->
+	{badarg, [{ets, lookup_element, _, _}|_]} ->
 	    exit(Why);
 	_ ->
 	    erlang:error(Why)
diff --git a/lib/mnesia/src/mnesia_loader.erl b/lib/mnesia/src/mnesia_loader.erl
index e785b795d1..607e205fef 100644
--- a/lib/mnesia/src/mnesia_loader.erl
+++ b/lib/mnesia/src/mnesia_loader.erl
@@ -464,7 +464,7 @@ init_table(Tab, disc_only_copies, Fun, false, DetsInfo,Sender) ->
 	{ErtsVer, DetsData}  ->  
 	    Res = (catch dets:is_compatible_bchunk_format(Tab, DetsData)),
 	    case Res of
-		{'EXIT',{undef,[{dets,_,_}|_]}} ->
+		{'EXIT',{undef,[{dets,_,_,_}|_]}} ->
 		    Sender ! {self(), {old_protocol, Tab}},
 		    dets:init_table(Tab, Fun);  %% Old dets version
 		{'EXIT', What} ->
diff --git a/lib/orber/src/corba.erl b/lib/orber/src/corba.erl
index ecec768544..989e84f581 100644
--- a/lib/orber/src/corba.erl
+++ b/lib/orber/src/corba.erl
@@ -947,7 +947,7 @@ handle_cast2(M, F, A, InternalState, State, Ctx) ->
 	    {noreply, {InternalState, NewState}}
     end.
 
-handle_exit(InternalState, State, {undef, [{M, F, _}|_]} = Reason, 
+handle_exit(InternalState, State, {undef, [{M, F, _, _}|_]} = Reason, 
 	    OnewayOp, {M, F}, A) ->
     case catch check_exports(M:module_info(exports), F) of
 	{'EXIT',{undef,_}} ->
@@ -979,7 +979,7 @@ handle_exit(InternalState, State, {undef, [{M, F, _}|_]} = Reason,
 			     #'OBJ_ADAPTER'{minor=(?ORBER_VMCID bor 4),
 					    completion_status=?COMPLETED_MAYBE})
     end;
-handle_exit(InternalState, State, {undef, [{M2, F2, A2}|_]} = Reason, 
+handle_exit(InternalState, State, {undef, [{M2, F2, A2, _}|_]} = Reason, 
 	    OnewayOp, {M, F}, A) ->
     case catch check_exports(M2:module_info(exports), F2) of
 	{'EXIT',{undef,_}} ->
diff --git a/lib/orber/src/orber_diagnostics.erl b/lib/orber/src/orber_diagnostics.erl
index c12dbfa896..c115d79524 100644
--- a/lib/orber/src/orber_diagnostics.erl
+++ b/lib/orber/src/orber_diagnostics.erl
@@ -130,10 +130,10 @@ missing_modules_helper([[Mod, Type]|T], ErrorsFound) when Type == ?IFR_StructDef
     end;
 missing_modules_helper([[Mod, Type]|T], ErrorsFound) when Type == ?IFR_InterfaceDef ->
     case catch Mod:oe_get_interface() of
-	{'EXIT', {undef,[{Mod, _, _}|_]}} ->
+	{'EXIT', {undef,[{Mod, _, _, _}|_]}} ->
 	    io:format("Missing (Interface): ~p~n", [Mod]),
 	    missing_modules_helper(T, ErrorsFound + 1);
-	{'EXIT', {undef,[{OtherMod, _, _}|_]}} ->
+	{'EXIT', {undef,[{OtherMod, _, _, _}|_]}} ->
 	    io:format("Missing (Inherited by the ~p Interface): ~p~n", 
 		      [Mod, OtherMod]),
 	    missing_modules_helper(T, ErrorsFound + 1);
diff --git a/lib/orber/src/orber_ifr.erl b/lib/orber/src/orber_ifr.erl
index e56672be93..9631a268e4 100644
--- a/lib/orber/src/orber_ifr.erl
+++ b/lib/orber/src/orber_ifr.erl
@@ -500,7 +500,7 @@ get_tc(Id, Type) ->
 	    case catch Module:tc() of
 		{'EXIT', Reason} ->
 		    case Reason of
-			{undef,[{Module, tc,[]}|_]} ->
+			{undef,[{Module, tc,[],_}|_]} ->
 			    orber:dbg("[~p] ~p:get_tc(~p);~nMissing ~p:tc()~n",
 				      [?LINE, ?MODULE, Id, Module], ?DEBUG_LEVEL),
 			    corba:raise(#'UNKNOWN'{minor=(?ORBER_VMCID bor 1),
diff --git a/lib/parsetools/include/yeccpre.hrl b/lib/parsetools/include/yeccpre.hrl
index 80a3afbdb6..f638529aa4 100644
--- a/lib/parsetools/include/yeccpre.hrl
+++ b/lib/parsetools/include/yeccpre.hrl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2010. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2011. All Rights Reserved.
 %%
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -67,7 +67,7 @@ yeccpars0(Tokens, Tzr, State, States, Vstack) ->
             Error
     end.
 
-yecc_error_type(function_clause, [{?MODULE,F,ArityOrArgs} | _]) ->
+yecc_error_type(function_clause, [{?MODULE,F,ArityOrArgs,_} | _]) ->
     case atom_to_list(F) of
         "yeccgoto_" ++ SymbolL ->
             {ok,[{atom,_,Symbol}],_} = erl_scan:string(SymbolL),
diff --git a/lib/parsetools/src/yeccparser.erl b/lib/parsetools/src/yeccparser.erl
index 63127802ee..e4b8b06db5 100644
--- a/lib/parsetools/src/yeccparser.erl
+++ b/lib/parsetools/src/yeccparser.erl
@@ -17,7 +17,7 @@ line_of(Token) ->
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2010. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2011. All Rights Reserved.
 %%
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -83,7 +83,7 @@ yeccpars0(Tokens, Tzr, State, States, Vstack) ->
             Error
     end.
 
-yecc_error_type(function_clause, [{?MODULE,F,ArityOrArgs} | _]) ->
+yecc_error_type(function_clause, [{?MODULE,F,ArityOrArgs,_} | _]) ->
     case atom_to_list(F) of
         "yeccgoto_" ++ SymbolL ->
             {ok,[{atom,_,Symbol}],_} = erl_scan:string(SymbolL),
diff --git a/lib/snmp/src/agent/snmpa_set_lib.erl b/lib/snmp/src/agent/snmpa_set_lib.erl
index 191029f6db..00c77a0cdb 100644
--- a/lib/snmp/src/agent/snmpa_set_lib.erl
+++ b/lib/snmp/src/agent/snmpa_set_lib.erl
@@ -378,15 +378,15 @@ dbg_apply(M,F,A) ->
 		Res
 	end,
     case Result of
-	{'EXIT', {undef, [{M, F, A} | _]}} ->
+	{'EXIT', {undef, [{M, F, A, _} | _]}} ->
 	    {'EXIT', {hook_undef, {M, F, A}}};
-	{'EXIT', {function_clause, [{M, F, A} | _]}} ->
+	{'EXIT', {function_clause, [{M, F, A, _} | _]}} ->
 	    {'EXIT', {hook_function_clause, {M, F, A}}};
 
 	% XXX: Old format for compatibility
-	{'EXIT', {undef, {M, F, A}}} ->
+	{'EXIT', {undef, {M, F, A, _}}} ->
 	    {'EXIT', {hook_undef, {M, F, A}}};
-	{'EXIT', {function_clause, {M, F, A}}} ->
+	{'EXIT', {function_clause, {M, F, A, _}}} ->
 	    {'EXIT', {hook_function_clause, {M, F, A}}};
 
 	Result ->
diff --git a/lib/stdlib/src/beam_lib.erl b/lib/stdlib/src/beam_lib.erl
index d9c645d787..9077e59fdc 100644
--- a/lib/stdlib/src/beam_lib.erl
+++ b/lib/stdlib/src/beam_lib.erl
@@ -224,7 +224,7 @@ version(File) ->
       MD5 :: binary().
 
 md5(File) ->
-    case catch read_significant_chunks(File) of
+    case catch read_significant_chunks(File, md5_chunks()) of
 	{ok, {Module, Chunks0}} ->
 	    Chunks = filter_funtab(Chunks0),
 	    {ok, {Module, erlang:md5([C || {_Id, C} <- Chunks])}};
@@ -395,7 +395,7 @@ strip_fils(Files) ->
 
 %% -> {ok, {Mod, FileName}} | {ok, {Mod, binary()}} | throw(Error)
 strip_file(File) ->
-    {ok, {Mod, Chunks}} = read_significant_chunks(File),
+    {ok, {Mod, Chunks}} = read_significant_chunks(File, significant_chunks()),
     {ok, Stripped0} = build_module(Chunks),
     Stripped = compress(Stripped0),
     case File of
@@ -453,8 +453,8 @@ is_useless_chunk("CInf") -> true;
 is_useless_chunk(_) -> false.
 
 %% -> {ok, {Module, Chunks}} | throw(Error)
-read_significant_chunks(File) ->
-    case read_chunk_data(File, significant_chunks(), [allow_missing_chunks]) of
+read_significant_chunks(File, ChunkList) ->
+    case read_chunk_data(File, ChunkList, [allow_missing_chunks]) of
 	{ok, {Module, Chunks0}} ->
 	    Mandatory = mandatory_chunks(),
 	    Chunks = filter_significant_chunks(Chunks0, Mandatory, File, Module),
@@ -835,12 +835,15 @@ file_error(FileName, {error, Reason}) ->
 error(Reason) ->
     throw({error, ?MODULE, Reason}).
 
-
-%% The following chunks are significant when calculating the MD5 for a module,
-%% and also the modules that must be retained when stripping a file.
-%% They are listed in the order that they should be MD5:ed.
+%% The following chunks must be kept when stripping a BEAM file.
 
 significant_chunks() ->
+    ["Line" | md5_chunks()].
+
+%% The following chunks are significant when calculating the MD5
+%% for a module. They are listed in the order that they should be MD5:ed.
+
+md5_chunks() ->
     ["Atom", "Code", "StrT", "ImpT", "ExpT", "FunT", "LitT"].
 
 %% The following chunks are mandatory in every Beam file.
diff --git a/lib/stdlib/src/c.erl b/lib/stdlib/src/c.erl
index febfdd6285..a920921a5e 100644
--- a/lib/stdlib/src/c.erl
+++ b/lib/stdlib/src/c.erl
@@ -797,7 +797,7 @@ appcall(App, M, F, Args) ->
     catch
 	error:undef ->
 	    case erlang:get_stacktrace() of
-		[{M,F,Args}|_] ->
+		[{M,F,Args,_}|_] ->
 		    Arity = length(Args),
 		    io:format("Call to ~w:~w/~w in application ~w failed.\n",
 			      [M,F,Arity,App]);
diff --git a/lib/stdlib/src/epp.erl b/lib/stdlib/src/epp.erl
index d804c1dee5..230a4a0612 100644
--- a/lib/stdlib/src/epp.erl
+++ b/lib/stdlib/src/epp.erl
@@ -684,7 +684,7 @@ scan_include_lib([{'(',_Llp},{string,_Lf,NewName0},{')',_Lrp},{dot,_Ld}],
 	{error,_E1} ->
 	    case catch find_lib_dir(NewName) of
 		{LibDir, Rest} when is_list(LibDir) ->
-		    LibName = filename:join([LibDir | Rest]),
+		    LibName = fname_join([LibDir | Rest]),
 		    case file:open(LibName, [read]) of
 			{ok,NewF} ->
 			    ExtraPath = [filename:dirname(LibName)],
@@ -1154,7 +1154,12 @@ expand_var1(NewName) ->
     [[$$ | Var] | Rest] = filename:split(NewName),
     Value = os:getenv(Var),
     true = Value =/= false,
-    {ok, filename:join([Value | Rest])}.
+    {ok, fname_join([Value | Rest])}.
+
+fname_join(["." | [_|_]=Rest]) ->
+    fname_join(Rest);
+fname_join(Components) ->
+    filename:join(Components).
 
 %% The line only. (Other tokens may have the column and text as well...)
 loc_attr(Line) when is_integer(Line) ->
diff --git a/lib/stdlib/src/erl_eval.erl b/lib/stdlib/src/erl_eval.erl
index 515ea2ebb7..4f4fa16040 100644
--- a/lib/stdlib/src/erl_eval.erl
+++ b/lib/stdlib/src/erl_eval.erl
@@ -621,7 +621,7 @@ eval_generate(Term, _P, _Bs0, _Lf, _Ef, _CompFun, _Acc) ->
     erlang:raise(error, {bad_generator,Term}, stacktrace()).
 
 eval_b_generate(<<_/bitstring>>=Bin, P, Bs0, Lf, Ef, CompFun, Acc) ->
-    Mfun = fun(L, R, Bs) -> match1(L, R, Bs, Bs0) end,
+    Mfun = match_fun(Bs0),
     Efun = fun(Exp, Bs) -> expr(Exp, Bs, Lf, Ef, none) end,
     case eval_bits:bin_gen(P, Bin, new_bindings(), Bs0, Mfun, Efun) of
 	{match, Rest, Bs1} ->
@@ -1024,7 +1024,7 @@ match1({tuple,_,_}, _, _Bs, _BBs) ->
     throw(nomatch);
 match1({bin, _, Fs}, <<_/bitstring>>=B, Bs0, BBs) ->
     eval_bits:match_bits(Fs, B, Bs0, BBs,
-			 fun(L, R, Bs) -> match1(L, R, Bs, BBs) end,
+			 match_fun(BBs),
 			 fun(E, Bs) -> expr(E, Bs, none, none, none) end);
 match1({bin,_,_}, _, _Bs, _BBs) ->
     throw(nomatch);
@@ -1053,6 +1053,12 @@ match1({op,Line,Op,L,R}, Term, Bs, BBs) ->
 match1(_, _, _Bs, _BBs) ->
     throw(invalid).
 
+match_fun(BBs) ->
+    fun(match, {L,R,Bs}) -> match1(L, R, Bs, BBs);
+       (binding, {Name,Bs}) -> binding(Name, Bs);
+       (add_binding, {Name,Val,Bs}) -> add_binding(Name, Val, Bs)
+    end.
+
 match_tuple([E|Es], Tuple, I, Bs0, BBs) ->
     {match,Bs} = match1(E, element(I, Tuple), Bs0, BBs),
     match_tuple(Es, Tuple, I+1, Bs, BBs);
diff --git a/lib/stdlib/src/escript.erl b/lib/stdlib/src/escript.erl
index d67617260e..2325bb63e5 100644
--- a/lib/stdlib/src/escript.erl
+++ b/lib/stdlib/src/escript.erl
@@ -866,7 +866,7 @@ hidden_apply(App, M, F, Args) ->
     catch
 	error:undef ->
 	    case erlang:get_stacktrace() of
-		[{M,F,Args} | _] ->
+		[{M,F,Args,_} | _] ->
 		    Arity = length(Args),
 		    Text = io_lib:format("Call to ~w:~w/~w in application ~w failed.\n",
 					 [M, F, Arity, App]),
diff --git a/lib/stdlib/src/eval_bits.erl b/lib/stdlib/src/eval_bits.erl
index 2cbd6cdae7..ddce4bd75a 100644
--- a/lib/stdlib/src/eval_bits.erl
+++ b/lib/stdlib/src/eval_bits.erl
@@ -31,8 +31,9 @@
 %% @type evalfun(). A closure which evaluates an expression given an
 %% environment
 %%
-%% @type matchfun(). A closure which performs a match given a value, a
-%% pattern and an environment
+%% @type matchfun(). A closure which depending on its first argument
+%% can perform a match (given a value, a pattern and an environment),
+%% lookup a variable in the bindings, or add a new binding
 %%
 %% @type field() represents a field in a "bin"
 
@@ -144,7 +145,8 @@ eval_exp_field(Val, Size, Unit, binary, _, _) ->
 bin_gen({bin,_,Fs}, Bin, Bs0, BBs0, Mfun, Efun) ->
     bin_gen(Fs, Bin, Bs0, BBs0, Mfun, Efun, true).
 
-bin_gen([F|Fs], Bin, Bs0, BBs0, Mfun, Efun, Flag) ->
+bin_gen([F|Fs], Bin, Bs0, BBs0, Mfun, Efun, Flag)
+  when is_function(Mfun, 2), is_function(Efun, 2) ->
     case bin_gen_field(F, Bin, Bs0, BBs0, Mfun, Efun) of
         {match,Bs,BBs,Rest} ->
             bin_gen(Fs, Rest, Bs, BBs, Mfun, Efun, Flag);
@@ -175,14 +177,14 @@ bin_gen_field({bin_element,Line,VE,Size0,Options0},
     {Size1, [Type,{unit,Unit},Sign,Endian]} = 
         make_bit_type(Line, Size0, Options0),
     V = erl_eval:partial_eval(VE),
-    match_check_size(Size1, BBs0),
+    match_check_size(Mfun, Size1, BBs0),
     {value, Size, _BBs} = Efun(Size1, BBs0),
     case catch get_value(Bin, Type, Size, Unit, Sign, Endian) of
         {Val,<<_/bitstring>>=Rest} ->
             NewV = coerce_to_float(V, Type),
-            case catch Mfun(NewV, Val, Bs0) of
+            case catch Mfun(match, {NewV,Val,Bs0}) of
                 {match,Bs} ->
-                    BBs = add_bin_binding(NewV, Bs, BBs0),
+                    BBs = add_bin_binding(Mfun, NewV, Bs, BBs0),
                     {match,Bs,BBs,Rest};
                 _ ->
                     {nomatch,Rest}
@@ -205,7 +207,8 @@ bin_gen_field({bin_element,Line,VE,Size0,Options0},
 match_bits(Fs, Bin, Bs0, BBs, Mfun, Efun, _) ->
     match_bits(Fs, Bin, Bs0, BBs, Mfun, Efun).
 
-match_bits(Fs, Bin, Bs0, BBs, Mfun, Efun) ->
+match_bits(Fs, Bin, Bs0, BBs, Mfun, Efun)
+  when is_function(Mfun, 2), is_function(Efun, 2) ->
     case catch match_bits_1(Fs, Bin, Bs0, BBs, Mfun, Efun) of
         {match,Bs} -> {match,Bs};
         invalid -> throw(invalid);
@@ -230,12 +233,12 @@ match_field_1({bin_element,Line,VE,Size0,Options0},
         make_bit_type(Line, Size0, Options0),
     V = erl_eval:partial_eval(VE),
     Size2 = erl_eval:partial_eval(Size1),
-    match_check_size(Size2, BBs0),
+    match_check_size(Mfun, Size2, BBs0),
     {value, Size, _BBs} = Efun(Size2, BBs0),
     {Val,Rest} = get_value(Bin, Type, Size, Unit, Sign, Endian),
     NewV = coerce_to_float(V, Type),
-    {match,Bs} = Mfun(NewV, Val, Bs0),
-    BBs = add_bin_binding(NewV, Bs, BBs0),
+    {match,Bs} = Mfun(match, {NewV,Val,Bs0}),
+    BBs = add_bin_binding(Mfun, NewV, Bs, BBs0),
     {Bs,BBs,Rest}.
 
 %% Almost identical to the one in sys_pre_expand.
@@ -249,12 +252,12 @@ coerce_to_float({integer,L,I}=E, float) ->
 coerce_to_float(E, _Type) -> 
     E.
 
-add_bin_binding({var,_,'_'}, _Bs, BBs) ->
+add_bin_binding(_, {var,_,'_'}, _Bs, BBs) ->
     BBs;
-add_bin_binding({var,_,Name}, Bs, BBs) ->
-    {value,Value} = erl_eval:binding(Name, Bs),
-    erl_eval:add_binding(Name, Value, BBs);
-add_bin_binding(_, _Bs, BBs) ->
+add_bin_binding(Mfun, {var,_,Name}, Bs, BBs) ->
+    {value,Value} = Mfun(binding, {Name,Bs}),
+    Mfun(add_binding, {Name,Value,BBs});
+add_bin_binding(_, _, _Bs, BBs) ->
     BBs.
 
 get_value(Bin, integer, Size, Unit, Sign, Endian) ->
@@ -327,20 +330,20 @@ make_bit_type(_Line, Size, Type0) -> %Size evaluates to an integer or 'all'
         {error,Reason} -> error(Reason)
     end.
 
-match_check_size({var,_,V}, Bs) -> 
-    case erl_eval:binding(V, Bs) of
+match_check_size(Mfun, {var,_,V}, Bs) ->
+    case Mfun(binding, {V,Bs}) of
         {value,_} -> ok;
 	unbound -> throw(invalid) % or, rather, error({unbound,V})
     end;
-match_check_size({atom,_,all}, _Bs) ->
+match_check_size(_, {atom,_,all}, _Bs) ->
     ok;
-match_check_size({atom,_,undefined}, _Bs) ->
+match_check_size(_, {atom,_,undefined}, _Bs) ->
     ok;
-match_check_size({integer,_,_}, _Bs) ->
+match_check_size(_, {integer,_,_}, _Bs) ->
     ok;
-match_check_size({value,_,_}, _Bs) ->
+match_check_size(_, {value,_,_}, _Bs) ->
     ok;	%From the debugger.
-match_check_size(_, _Bs) -> 
+match_check_size(_, _, _Bs) ->
     throw(invalid).
 
 %% error(Reason) -> exception thrown
diff --git a/lib/stdlib/src/gen_event.erl b/lib/stdlib/src/gen_event.erl
index 1c4a73680b..d1dd074fba 100644
--- a/lib/stdlib/src/gen_event.erl
+++ b/lib/stdlib/src/gen_event.erl
@@ -667,16 +667,16 @@ report_error(_Handler, {swapped,_,_}, _, _, _)      -> ok;
 report_error(Handler, Reason, State, LastIn, SName) ->
     Reason1 = 
 	case Reason of
-	    {'EXIT',{undef,[{M,F,A}|MFAs]}} ->
+	    {'EXIT',{undef,[{M,F,A,L}|MFAs]}} ->
 		case code:is_loaded(M) of
 		    false ->
-			{'module could not be loaded',[{M,F,A}|MFAs]};
+			{'module could not be loaded',[{M,F,A,L}|MFAs]};
 		    _ ->
 			case erlang:function_exported(M, F, length(A)) of
 			    true ->
-				{undef,[{M,F,A}|MFAs]};
+				{undef,[{M,F,A,L}|MFAs]};
 			    false ->
-				{'function not exported',[{M,F,A}|MFAs]}
+				{'function not exported',[{M,F,A,L}|MFAs]}
 			end
 		end;
 	    {'EXIT',Why} ->
diff --git a/lib/stdlib/src/gen_fsm.erl b/lib/stdlib/src/gen_fsm.erl
index f2f1365d3d..ea21136bdb 100644
--- a/lib/stdlib/src/gen_fsm.erl
+++ b/lib/stdlib/src/gen_fsm.erl
@@ -561,16 +561,16 @@ terminate(Reason, Name, Msg, Mod, StateName, StateData, Debug) ->
 error_info(Reason, Name, Msg, StateName, StateData, Debug) ->
     Reason1 = 
 	case Reason of
-	    {undef,[{M,F,A}|MFAs]} ->
+	    {undef,[{M,F,A,L}|MFAs]} ->
 		case code:is_loaded(M) of
 		    false ->
-			{'module could not be loaded',[{M,F,A}|MFAs]};
+			{'module could not be loaded',[{M,F,A,L}|MFAs]};
 		    _ ->
 			case erlang:function_exported(M, F, length(A)) of
 			    true ->
 				Reason;
 			    false ->
-				{'function not exported',[{M,F,A}|MFAs]}
+				{'function not exported',[{M,F,A,L}|MFAs]}
 			end
 		end;
 	    _ ->
diff --git a/lib/stdlib/src/gen_server.erl b/lib/stdlib/src/gen_server.erl
index 09d94a9c40..b8ea3a4de2 100644
--- a/lib/stdlib/src/gen_server.erl
+++ b/lib/stdlib/src/gen_server.erl
@@ -729,16 +729,16 @@ error_info(_Reason, application_controller, _Msg, _State, _Debug) ->
 error_info(Reason, Name, Msg, State, Debug) ->
     Reason1 = 
 	case Reason of
-	    {undef,[{M,F,A}|MFAs]} ->
+	    {undef,[{M,F,A,L}|MFAs]} ->
 		case code:is_loaded(M) of
 		    false ->
-			{'module could not be loaded',[{M,F,A}|MFAs]};
+			{'module could not be loaded',[{M,F,A,L}|MFAs]};
 		    _ ->
 			case erlang:function_exported(M, F, length(A)) of
 			    true ->
 				Reason;
 			    false ->
-				{'function not exported',[{M,F,A}|MFAs]}
+				{'function not exported',[{M,F,A,L}|MFAs]}
 			end
 		end;
 	    _ ->
diff --git a/lib/stdlib/src/lib.erl b/lib/stdlib/src/lib.erl
index c303ae60b5..314fd60903 100644
--- a/lib/stdlib/src/lib.erl
+++ b/lib/stdlib/src/lib.erl
@@ -173,12 +173,12 @@ format_fun(Fun) when is_function(Fun) ->
 
 analyze_exception(error, Term, Stack) ->
     case {is_stacktrace(Stack), Stack, Term} of
-        {true, [{_M,_F,As}=MFA|MFAs], function_clause} when is_list(As) -> 
-            {Term,[MFA],MFAs};
-        {true, [{shell,F,A}], function_clause} when is_integer(A) ->
+        {true, [{_,_,As,_}=MFAL|MFAs], function_clause} when is_list(As) ->
+            {Term,[MFAL],MFAs};
+        {true, [{shell,F,A,_}], function_clause} when is_integer(A) ->
             {Term, [{F,A}], []};
-        {true, [{_M,_F,_AorAs}=MFA|MFAs], undef} ->
-            {Term,[MFA],MFAs};
+        {true, [{_,_,_,_}=MFAL|MFAs], undef} ->
+            {Term,[MFAL],MFAs};
 	{true, _, _} ->
 	    {Term,[],Stack};
 	{false, _, _} ->
@@ -194,9 +194,11 @@ analyze_exception(_Class, Term, Stack) ->
 
 is_stacktrace([]) ->
     true;
-is_stacktrace([{M,F,A}|Fs]) when is_atom(M), is_atom(F), is_integer(A) ->
+is_stacktrace([{M,F,A,I}|Fs])
+  when is_atom(M), is_atom(F), is_integer(A), is_list(I) ->
     is_stacktrace(Fs);
-is_stacktrace([{M,F,As}|Fs]) when is_atom(M), is_atom(F), length(As) >= 0 ->
+is_stacktrace([{M,F,As,I}|Fs])
+  when is_atom(M), is_atom(F), length(As) >= 0, is_list(I) ->
     is_stacktrace(Fs);
 is_stacktrace(_) ->
     false.
@@ -225,9 +227,9 @@ explain_reason(function_clause, error, [{F,A}], _PF, _S) ->
     %% Shell commands
     FAs = io_lib:fwrite(<<"~w/~w">>, [F, A]),
     [<<"no function clause matching call to ">> | FAs];
-explain_reason(function_clause, error=Cl, [{M,F,As}], PF, S) ->
+explain_reason(function_clause, error=Cl, [{M,F,As,Loc}], PF, S) ->
     Str = <<"no function clause matching ">>,
-    format_errstr_call(Str, Cl, {M,F}, As, PF, S);
+    [format_errstr_call(Str, Cl, {M,F}, As, PF, S),$\s|location(Loc)];
 explain_reason(if_clause, error, [], _PF, _S) ->
     <<"no true branch found when evaluating an if expression">>;
 explain_reason(noproc, error, [], _PF, _S) ->
@@ -242,11 +244,11 @@ explain_reason({try_clause,V}, error=Cl, [], PF, S) ->
     %% "there is no try clause with a true guard sequence and a
     %% pattern matching..."
     format_value(V, <<"no try clause matching ">>, Cl, PF, S);
-explain_reason(undef, error, [{M,F,A}], _PF, _S) ->
+explain_reason(undef, error, [{M,F,A,_}], _PF, _S) ->
     %% Only the arity is displayed, not the arguments, if there are any.
     io_lib:fwrite(<<"undefined function ~s">>, 
                   [mfa_to_string(M, F, n_args(A))]);
-explain_reason({shell_undef,F,A}, error, [], _PF, _S) ->
+explain_reason({shell_undef,F,A,_}, error, [], _PF, _S) ->
     %% Give nicer reports for undefined shell functions
     %% (but not when the user actively calls shell_default:F(...)).
     io_lib:fwrite(<<"undefined shell command ~s/~w">>, [F, n_args(A)]);
@@ -292,17 +294,19 @@ argss(I) ->
     io_lib:fwrite(<<"~w arguments">>, [I]).
 
 format_stacktrace1(S0, Stack0, PF, SF) ->
-    Stack1 = lists:dropwhile(fun({M,F,A}) -> SF(M, F, A)
+    Stack1 = lists:dropwhile(fun({M,F,A,_}) -> SF(M, F, A)
                              end, lists:reverse(Stack0)),
     S = ["  " | S0],
     Stack = lists:reverse(Stack1),
     format_stacktrace2(S, Stack, 1, PF).
 
-format_stacktrace2(S, [{M,F,A}|Fs], N, PF) when is_integer(A) ->
-    [io_lib:fwrite(<<"~s~s ~s">>, 
-                   [sep(N, S), origin(N, M, F, A), mfa_to_string(M, F, A)])
+format_stacktrace2(S, [{M,F,A,L}|Fs], N, PF) when is_integer(A) ->
+    [io_lib:fwrite(<<"~s~s ~s ~s">>,
+                   [sep(N, S), origin(N, M, F, A),
+		    mfa_to_string(M, F, A),
+		    location(L)])
      | format_stacktrace2(S, Fs, N + 1, PF)];
-format_stacktrace2(S, [{M,F,As}|Fs], N, PF) when is_list(As) ->
+format_stacktrace2(S, [{M,F,As,_}|Fs], N, PF) when is_list(As) ->
     A = length(As),
     CalledAs = [S,<<"   called as ">>],
     C = format_call("", CalledAs, {M,F}, As, PF),
@@ -313,6 +317,16 @@ format_stacktrace2(S, [{M,F,As}|Fs], N, PF) when is_list(As) ->
 format_stacktrace2(_S, [], _N, _PF) ->
     "".
 
+location(L) ->
+    File = proplists:get_value(file, L),
+    Line = proplists:get_value(line, L),
+    if
+	File =/= undefined, Line =/= undefined ->
+	    io_lib:format("(~s, line ~w)", [File, Line]);
+	true ->
+	    ""
+    end.
+
 sep(1, S) -> S;
 sep(_, S) -> [$\n | S].
 
diff --git a/lib/stdlib/src/qlc.erl b/lib/stdlib/src/qlc.erl
index 5ca04ff023..f5e180b4bd 100644
--- a/lib/stdlib/src/qlc.erl
+++ b/lib/stdlib/src/qlc.erl
@@ -123,7 +123,7 @@
 
 -record(setup, {parent}).
 
--define(THROWN_ERROR, {?MODULE, throw_error, _}).
+-define(THROWN_ERROR, {?MODULE, throw_error, _, _}).
 
 -export_type([query_handle/0]).
 
@@ -3701,7 +3701,8 @@ lookup_join(F1, C1, LuF, C2, Rev) ->
 maybe_error_logger(allowed, _) ->
     ok;
 maybe_error_logger(Name, Why) ->
-    [_, _, {?MODULE,maybe_error_logger,_} | Stacktrace] = expand_stacktrace(),
+    [_, _, {?MODULE,maybe_error_logger,_,_} | Stacktrace] =
+	expand_stacktrace(),
     Trimmer = fun(M, _F, _A) -> M =:= erl_eval end,
     Formater = fun(Term, I) -> io_lib:print(Term, I, 80, -1) end,
     X = lib:format_stacktrace(1, Stacktrace, Trimmer, Formater),
@@ -3720,7 +3721,7 @@ expand_stacktrace() ->
 expand_stacktrace(D) ->
     _ = erlang:system_flag(backtrace_depth, D),
     {'EXIT', {foo, Stacktrace}} = (catch erlang:error(foo)),
-    L = lists:takewhile(fun({M,_,_}) -> M =/= ?MODULE 
+    L = lists:takewhile(fun({M,_,_,_}) -> M =/= ?MODULE
                         end, lists:reverse(Stacktrace)),
     if
         length(L) < 3 andalso length(Stacktrace) =:= D ->
diff --git a/lib/stdlib/src/re.erl b/lib/stdlib/src/re.erl
index e08258a535..99bcbd722e 100644
--- a/lib/stdlib/src/re.erl
+++ b/lib/stdlib/src/re.erl
@@ -573,10 +573,10 @@ ucompile(RE,Options) ->
 	re:compile(unicode:characters_to_binary(RE,unicode),Options)
     catch
 	error:AnyError ->
-	    {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} = 
+	    {'EXIT',{new_stacktrace,[{Mod,_,L,Loc}|Rest]}} =
 		(catch erlang:error(new_stacktrace,
 				    [RE,Options])),
-	    erlang:raise(error,AnyError,[{Mod,compile,L}|Rest])
+	    erlang:raise(error,AnyError,[{Mod,compile,L,Loc}|Rest])
     end.
 	
 
@@ -585,10 +585,10 @@ urun(Subject,RE,Options) ->
 	urun2(Subject,RE,Options)
     catch
 	error:AnyError ->
-	    {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} = 
+	    {'EXIT',{new_stacktrace,[{Mod,_,L,Loc}|Rest]}} =
 		(catch erlang:error(new_stacktrace,
 				    [Subject,RE,Options])),
-	    erlang:raise(error,AnyError,[{Mod,run,L}|Rest])
+	    erlang:raise(error,AnyError,[{Mod,run,L,Loc}|Rest])
     end.
 
 urun2(Subject0,RE0,Options0) ->
@@ -625,20 +625,20 @@ grun(Subject,RE,{Options,NeedClean}) ->
 	grun2(Subject,RE,{Options,NeedClean})
     catch
 	error:AnyError ->
-	    {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} = 
+	    {'EXIT',{new_stacktrace,[{Mod,_,L,Loc}|Rest]}} =
 		(catch erlang:error(new_stacktrace,
 				    [Subject,RE,Options])),
-	    erlang:raise(error,AnyError,[{Mod,run,L}|Rest])
+	    erlang:raise(error,AnyError,[{Mod,run,L,Loc}|Rest])
     end;
 grun(Subject,RE,{Options,NeedClean,OrigRE}) ->
     try
 	grun2(Subject,RE,{Options,NeedClean})
     catch
 	error:AnyError ->
-	    {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} = 
+	    {'EXIT',{new_stacktrace,[{Mod,_,L,Loc}|Rest]}} =
 		(catch erlang:error(new_stacktrace,
 				    [Subject,OrigRE,Options])),
-	    erlang:raise(error,AnyError,[{Mod,run,L}|Rest])
+	    erlang:raise(error,AnyError,[{Mod,run,L,Loc}|Rest])
     end.
 
 grun2(Subject,RE,{Options,NeedClean}) ->
diff --git a/lib/stdlib/src/shell.erl b/lib/stdlib/src/shell.erl
index e3e23e09bc..964697cae6 100644
--- a/lib/stdlib/src/shell.erl
+++ b/lib/stdlib/src/shell.erl
@@ -1088,7 +1088,7 @@ shell_default(F,As,Bs) ->
     end.
 
 shell_undef(F,A) ->
-    erlang:error({shell_undef,F,A}).
+    erlang:error({shell_undef,F,A,[]}).
 
 local_func_handler(Shell, RT, Ef) ->
     H = fun(Lf) -> 
diff --git a/lib/stdlib/src/unicode.erl b/lib/stdlib/src/unicode.erl
index a5d9965ca2..e9b90befe6 100644
--- a/lib/stdlib/src/unicode.erl
+++ b/lib/stdlib/src/unicode.erl
@@ -73,7 +73,7 @@ characters_to_list_int(ML, Encoding) ->
 			   _ ->
 			       badarg
 		       end,
-	    {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} = 
+	    {'EXIT',{new_stacktrace,[{Mod,_,L,_}|Rest]}} =
 		(catch erlang:error(new_stacktrace,
 				    [ML,Encoding])),
 	    erlang:raise(error,TheError,[{Mod,characters_to_list,L}|Rest])
@@ -109,7 +109,7 @@ characters_to_binary(ML) ->
 			   _ ->
 			       badarg
 		       end,
-	    {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} = 
+	    {'EXIT',{new_stacktrace,[{Mod,_,L,_}|Rest]}} =
 		(catch erlang:error(new_stacktrace,
 				    [ML])),
 	    erlang:raise(error,TheError,[{Mod,characters_to_binary,L}|Rest])
@@ -127,7 +127,7 @@ characters_to_binary_int(ML,InEncoding) ->
 			   _ ->
 			       badarg
 		       end,
-	    {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} = 
+	    {'EXIT',{new_stacktrace,[{Mod,_,L,_}|Rest]}} =
 		(catch erlang:error(new_stacktrace,
 				    [ML,InEncoding])),
 	    erlang:raise(error,TheError,[{Mod,characters_to_binary,L}|Rest])
@@ -159,7 +159,7 @@ characters_to_binary(ML, latin1, Uni) when is_binary(ML) and ((Uni =:= utf8) or
 				       _ ->
 					   badarg
 				   end,
-			{'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} = 
+			{'EXIT',{new_stacktrace,[{Mod,_,L,_}|Rest]}} =
 			    (catch erlang:error(new_stacktrace,
 						[ML,latin1,Uni])),
 			erlang:raise(error,TheError,
@@ -181,7 +181,7 @@ characters_to_binary(ML,Uni,latin1) when is_binary(ML) and ((Uni =:= utf8) or
 				       _ ->
 					   badarg
 				   end,
-			{'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} = 
+			{'EXIT',{new_stacktrace,[{Mod,_,L,_}|Rest]}} =
 			    (catch erlang:error(new_stacktrace,
 						[ML,Uni,latin1])),
 			erlang:raise(error,TheError,
@@ -200,7 +200,7 @@ characters_to_binary(ML, InEncoding, OutEncoding) ->
 			   _ ->
 			       badarg
 		       end,
-	    {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} = 
+	    {'EXIT',{new_stacktrace,[{Mod,_,L,_}|Rest]}} =
 		(catch erlang:error(new_stacktrace,
 				    [ML,InEncoding,OutEncoding])),
 	    erlang:raise(error,TheError,[{Mod,characters_to_binary,L}|Rest])
diff --git a/lib/stdlib/test/beam_lib_SUITE.erl b/lib/stdlib/test/beam_lib_SUITE.erl
index 4ccc863795..e42dd341c0 100644
--- a/lib/stdlib/test/beam_lib_SUITE.erl
+++ b/lib/stdlib/test/beam_lib_SUITE.erl
@@ -330,6 +330,7 @@ strip(Conf) when is_list(Conf) ->
     ?line {Source2D1, BeamFile2D1} = make_beam(PrivDir, simple2, concat),
     ?line {Source3D1, BeamFile3D1} = make_beam(PrivDir, make_fun, make_fun),
     ?line {Source4D1, BeamFile4D1} = make_beam(PrivDir, constant, constant),
+    ?line {Source5D1, BeamFile5D1} = make_beam(PrivDir, lines, lines),
 
     ?line NoOfTables = length(ets:all()),
     ?line P0 = pps(),
@@ -360,13 +361,25 @@ strip(Conf) when is_list(Conf) ->
     ?line {module, make_fun} = code:load_abs(filename:rootname(BeamFile3D1)),
     ?line {module, constant} = code:load_abs(filename:rootname(BeamFile4D1)),
 
+    %% check that line number information is still present after stripping
+    ?line {module, lines} = code:load_abs(filename:rootname(BeamFile5D1)),
+    ?line {'EXIT',{badarith,[{lines,t,1,Info}|_]}} =
+	(catch lines:t(atom)),
+    ?line true = code:delete(lines),
+    ?line false = code:purge(lines),
+    ?line {ok, {lines,BeamFile5D1}} = beam_lib:strip(BeamFile5D1),
+    ?line {module, lines} = code:load_abs(filename:rootname(BeamFile5D1)),
+    ?line {'EXIT',{badarith,[{lines,t,1,Info}|_]}} =
+	(catch lines:t(atom)),
+
     ?line true = (P0 == pps()),
     ?line NoOfTables = length(ets:all()),
 
     ?line delete_files([SourceD1, BeamFileD1, 
 			Source2D1, BeamFile2D1, 
 			Source3D1, BeamFile3D1,
-			Source4D1, BeamFile4D1]),
+			Source4D1, BeamFile4D1,
+			Source5D1, BeamFile5D1]),
     ok.
 
 
@@ -773,6 +786,12 @@ simple_file(File, Module, constant2) ->
 			"t(A) -> "
 			"    {a,b,[2,3],x,y}. "]),
     ok = file:write_file(File, B);
+simple_file(File, Module, lines) ->
+    B = list_to_binary(["-module(", atom_to_list(Module), ").\n"
+			"-export([t/1]).\n"
+			"t(A) ->\n"
+			"    A+1.\n"]),
+    ok = file:write_file(File, B);
 simple_file(File, Module, F) ->
     B = list_to_binary(["-module(", atom_to_list(Module), "). "
 			"-export([t/0]). "
diff --git a/lib/stdlib/test/dets_SUITE.erl b/lib/stdlib/test/dets_SUITE.erl
index 698070368f..272a8d3950 100644
--- a/lib/stdlib/test/dets_SUITE.erl
+++ b/lib/stdlib/test/dets_SUITE.erl
@@ -1857,9 +1857,9 @@ fixtable(Config, Version) when is_list(Config) ->
     ?line {ok, _} = dets:open_file(T, Args),
 
     %% badarg
-    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true]}|_]}} =
+    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true],_}|_]}} =
 	(catch dets:safe_fixtable(no_table,true)),
-    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[T,undefined]}|_]}} =
+    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[T,undefined],_}|_]}} =
 	(catch dets:safe_fixtable(T,undefined)),
 
     %% The table is not allowed to grow while the elements are inserted:
@@ -1940,21 +1940,21 @@ match(Config, Version) ->
 
     %% match, badarg
     MSpec = [{'_',[],['$_']}],
-    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true],_}|_]}} =
 	(catch dets:match(no_table, '_')),
-    ?line {'EXIT', {badarg, [{dets,match,[T,'_',not_a_number]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,match,[T,'_',not_a_number],_}|_]}} =
 	(catch dets:match(T, '_', not_a_number)),
     ?line {EC1, _} = dets:select(T, MSpec, 1),
-    ?line {'EXIT', {badarg, [{dets,match,[EC1]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,match,[EC1],_}|_]}} =
 	(catch dets:match(EC1)),
 
     %% match_object, badarg
-    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true],_}|_]}} =
 	(catch dets:match_object(no_table, '_')),
-    ?line {'EXIT', {badarg, [{dets,match_object,[T,'_',not_a_number]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,match_object,[T,'_',not_a_number],_}|_]}} =
 	(catch dets:match_object(T, '_', not_a_number)),
     ?line {EC2, _} = dets:select(T, MSpec, 1),
-    ?line {'EXIT', {badarg, [{dets,match_object,[EC2]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,match_object,[EC2],_}|_]}} =
 	(catch dets:match_object(EC2)),
 
     dets:safe_fixtable(T, true),
@@ -2118,16 +2118,16 @@ select(Config, Version) ->
 
     %% badarg
     MSpec = [{'_',[],['$_']}],
-    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true],_}|_]}} =
 	(catch dets:select(no_table, MSpec)),
-    ?line {'EXIT', {badarg, [{dets,select,[T,<<17>>]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,select,[T,<<17>>],_}|_]}} =
 	(catch dets:select(T, <<17>>)),
-    ?line {'EXIT', {badarg, [{dets,select,[T,[]]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,select,[T,[]],_}|_]}} =
 	(catch dets:select(T, [])),
-    ?line {'EXIT', {badarg, [{dets,select,[T,MSpec,not_a_number]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,select,[T,MSpec,not_a_number],_}|_]}} =
 	(catch dets:select(T, MSpec, not_a_number)),
     ?line {EC, _} = dets:match(T, '_', 1),
-    ?line {'EXIT', {badarg, [{dets,select,[EC]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,select,[EC],_}|_]}} =
 	(catch dets:select(EC)),
 
     AllSpec = [{'_',[],['$_']}],
@@ -2210,7 +2210,7 @@ update_counter(Config) when is_list(Config) ->
     ?line file:delete(Fname),
     P0 = pps(),
 
-    ?line {'EXIT', {badarg, [{dets,update_counter,[no_table,1,1]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,update_counter,[no_table,1,1],_}|_]}} =
 	(catch dets:update_counter(no_table, 1, 1)),
 
     Args = [{file,Fname},{keypos,2}],
@@ -2254,65 +2254,66 @@ badarg(Config) when is_list(Config) ->
     %% badargs are tested in match, select and fixtable too.
 
     %% open
-    ?line {'EXIT', {badarg, [{dets,open_file,[{a,tuple},[]]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,open_file,[{a,tuple},[]],_}|_]}} =
 	(catch dets:open_file({a,tuple},[])),
-    ?line {'EXIT', {badarg, [{dets,open_file,[{a,tuple}]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,open_file,[{a,tuple}],_}|_]}} =
 	(catch dets:open_file({a,tuple})),
-    ?line {'EXIT', {badarg, [{dets,open_file,[file,[foo]]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,open_file,[file,[foo]],_}|_]}} =
 	(catch dets:open_file(file,[foo])),
-    ?line {'EXIT', {badarg,[{dets,open_file,[{hej,san},[{type,set}|3]]}|_]}} =
+    ?line {'EXIT', {badarg,[{dets,open_file,
+			     [{hej,san},[{type,set}|3]],_}|_]}} =
 	(catch dets:open_file({hej,san},[{type,set}|3])),
 
     %% insert
-    ?line {'EXIT', {badarg, [{dets,insert,[no_table,{1,2}]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,insert,[no_table,{1,2}],_}|_]}} =
 	(catch dets:insert(no_table, {1,2})),
-    ?line {'EXIT', {badarg, [{dets,insert,[no_table,[{1,2}]]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,insert,[no_table,[{1,2}]],_}|_]}} =
 	(catch dets:insert(no_table, [{1,2}])),
-    ?line {'EXIT', {badarg, [{dets,insert,[T,{1,2}]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,insert,[T,{1,2}],_}|_]}} =
 	(catch dets:insert(T, {1,2})),
-    ?line {'EXIT', {badarg, [{dets,insert,[T,[{1,2}]]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,insert,[T,[{1,2}]],_}|_]}} =
 	(catch dets:insert(T, [{1,2}])),
-    ?line {'EXIT', {badarg, [{dets,insert,[T,[{1,2,3}|3]]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,insert,[T,[{1,2,3}|3]],_}|_]}} =
 	      (catch dets:insert(T, [{1,2,3} | 3])),
 
     %% lookup{_keys}
-    ?line {'EXIT', {badarg, [{dets,lookup_keys,[badarg,[]]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,lookup_keys,[badarg,[]],_}|_]}} =
 	(catch dets:lookup_keys(T, [])),
-    ?line {'EXIT', {badarg, [{dets,lookup,[no_table,1]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,lookup,[no_table,1],_}|_]}} =
 	(catch dets:lookup(no_table, 1)),
-    ?line {'EXIT', {badarg, [{dets,lookup_keys,[T,[1|2]]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,lookup_keys,[T,[1|2]],_}|_]}} =
 	(catch dets:lookup_keys(T, [1 | 2])),
 
     %% member
-    ?line {'EXIT', {badarg, [{dets,member,[no_table,1]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,member,[no_table,1],_}|_]}} =
 	(catch dets:member(no_table, 1)),
 
     %% sync
-    ?line {'EXIT', {badarg, [{dets,sync,[no_table]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,sync,[no_table],_}|_]}} =
 	(catch dets:sync(no_table)),
 
     %% delete{_keys}
-    ?line {'EXIT', {badarg, [{dets,delete,[no_table,1]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,delete,[no_table,1],_}|_]}} =
 	(catch dets:delete(no_table, 1)),
 
     %% delete_object
-    ?line {'EXIT', {badarg, [{dets,delete_object,[no_table,{1,2,3}]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,delete_object,[no_table,{1,2,3}],_}|_]}} =
 	(catch dets:delete_object(no_table, {1,2,3})),
-    ?line {'EXIT', {badarg, [{dets,delete_object,[T,{1,2}]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,delete_object,[T,{1,2}],_}|_]}} =
 	(catch dets:delete_object(T, {1,2})),
-    ?line {'EXIT', {badarg, [{dets,delete_object,[no_table,[{1,2,3}]]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,delete_object,[no_table,[{1,2,3}]],_}|_]}} =
 	(catch dets:delete_object(no_table, [{1,2,3}])),
-    ?line {'EXIT', {badarg, [{dets,delete_object,[T,[{1,2}]]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,delete_object,[T,[{1,2}]],_}|_]}} =
 	(catch dets:delete_object(T, [{1,2}])),
-    ?line {'EXIT', {badarg, [{dets,delete_object,[T,[{1,2,3}|3]]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,delete_object,[T,[{1,2,3}|3]],_}|_]}} =
 	(catch dets:delete_object(T, [{1,2,3} | 3])),
 
     %% first,next,slot
-    ?line {'EXIT', {badarg, [{dets,first,[no_table]}|_]}} =
+    ?line {'EXIT', {badarg, [{dets,first,[no_table],_}|_]}} =
 	(catch dets:first(no_table)),
-    ?line {'EXIT', {badarg, [{dets,next,[no_table,1]}|_]}} =
+    ?line {'EXIT', {badarg, [{dets,next,[no_table,1],_}|_]}} =
 	(catch dets:next(no_table, 1)),
-    ?line {'EXIT', {badarg, [{dets,slot,[no_table,0]}|_]}} =
+    ?line {'EXIT', {badarg, [{dets,slot,[no_table,0],_}|_]}} =
 	(catch dets:slot(no_table, 0)),
 
     %% info
@@ -2321,26 +2322,26 @@ badarg(Config) when is_list(Config) ->
     ?line undefined = dets:info(T, foo),
 
     %% match_delete
-    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true],_}|_]}} =
 	(catch dets:match_delete(no_table, '_')),
 
     %% delete_all_objects
-    ?line {'EXIT', {badarg, [{dets,delete_all_objects,[no_table]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,delete_all_objects,[no_table],_}|_]}} =
 	(catch dets:delete_all_objects(no_table)),
 
     %% select_delete
     MSpec = [{'_',[],['$_']}],
-    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true],_}|_]}} =
 	(catch dets:select_delete(no_table, MSpec)),
-    ?line {'EXIT', {badarg, [{dets,select_delete,[T, <<17>>]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,select_delete,[T, <<17>>],_}|_]}} =
 	(catch dets:select_delete(T, <<17>>)),
 
     %% traverse, fold
-    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true],_}|_]}} =
 	(catch dets:traverse(no_table, fun(_) -> continue end)),
-    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true],_}|_]}} =
 	(catch dets:foldl(fun(_, A) -> A end, [], no_table)),
-    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true]}|_]}} = 
+    ?line {'EXIT', {badarg, [{dets,safe_fixtable,[no_table,true],_}|_]}} =
 	(catch dets:foldr(fun(_, A) -> A end, [], no_table)),
 
     %% close
@@ -2349,14 +2350,14 @@ badarg(Config) when is_list(Config) ->
     ?line {error, not_owner} = dets:close(T),
 
     %% init_table
-    ?line {'EXIT', {badarg,[{dets,init_table,[no_table,_,[]]}|_]}} =
+    ?line {'EXIT', {badarg,[{dets,init_table,[no_table,_,[]],_}|_]}} =
 	(catch dets:init_table(no_table, fun(X) -> X end)),
-    ?line {'EXIT', {badarg,[{dets,init_table,[no_table,_,[]]}|_]}} =
+    ?line {'EXIT', {badarg,[{dets,init_table,[no_table,_,[]],_}|_]}} =
 	(catch dets:init_table(no_table, fun(X) -> X end, [])),
 
     %% from_ets
     Ets = ets:new(ets,[]),
-    ?line {'EXIT', {badarg,[{dets,from_ets,[no_table,_]}|_]}} =
+    ?line {'EXIT', {badarg,[{dets,from_ets,[no_table,_],_}|_]}} =
 	(catch dets:from_ets(no_table, Ets)),
     ets:delete(Ets),
 
diff --git a/lib/stdlib/test/ets_SUITE.erl b/lib/stdlib/test/ets_SUITE.erl
index 9341300f90..02e97fb3a8 100644
--- a/lib/stdlib/test/ets_SUITE.erl
+++ b/lib/stdlib/test/ets_SUITE.erl
@@ -795,16 +795,16 @@ t_ets_dets(Config, Opts) ->
     ?line true = ets:from_dets(ETab,DTab),
     ?line 3000 = ets:info(ETab,size),
     ?line ets:delete(ETab),
-    ?line {'EXIT',{badarg,[{ets,to_dets,[ETab,DTab]}|_]}} =
+    ?line {'EXIT',{badarg,[{ets,to_dets,[ETab,DTab],_}|_]}} =
 	(catch ets:to_dets(ETab,DTab)),
-    ?line {'EXIT',{badarg,[{ets,from_dets,[ETab,DTab]}|_]}} =
+    ?line {'EXIT',{badarg,[{ets,from_dets,[ETab,DTab],_}|_]}} =
 	(catch ets:from_dets(ETab,DTab)),
     ?line ETab2 = ets_new(x,Opts),
     ?line filltabint(ETab2,3000),
     ?line dets:close(DTab),
-    ?line {'EXIT',{badarg,[{ets,to_dets,[ETab2,DTab]}|_]}} =
+    ?line {'EXIT',{badarg,[{ets,to_dets,[ETab2,DTab],_}|_]}} =
 	(catch ets:to_dets(ETab2,DTab)),
-    ?line {'EXIT',{badarg,[{ets,from_dets,[ETab2,DTab]}|_]}} =
+    ?line {'EXIT',{badarg,[{ets,from_dets,[ETab2,DTab],_}|_]}} =
 	(catch ets:from_dets(ETab2,DTab)),
     ?line ets:delete(ETab2),
     ?line (catch file:delete(Fname)),
@@ -2644,7 +2644,7 @@ maybe_sort(L) when is_list(L) ->
 %maybe_sort({'EXIT',{Reason, [{Module, Function, _}|_]}}) ->
 %    {'EXIT',{Reason, [{Module, Function, '_'}]}};
 maybe_sort({'EXIT',{Reason, List}}) when is_list(List) ->
-    {'EXIT',{Reason, lists:map(fun({Module, Function, _}) ->
+    {'EXIT',{Reason, lists:map(fun({Module, Function, _, _}) ->
 				       {Module, Function, '_'}
 			       end,
 			       List)}};
diff --git a/lib/stdlib/test/filelib_SUITE.erl b/lib/stdlib/test/filelib_SUITE.erl
index a355097fe2..dc4563967c 100644
--- a/lib/stdlib/test/filelib_SUITE.erl
+++ b/lib/stdlib/test/filelib_SUITE.erl
@@ -97,11 +97,12 @@ wildcard_errors(Config) when is_list(Config) ->
 
 wcc(Wc, Error) ->
     {'EXIT',{{badpattern,Error},
-	     [{filelib,compile_wildcard,1}|_]}} = (catch filelib:compile_wildcard(Wc)),
+	     [{filelib,compile_wildcard,1,_}|_]}} =
+	(catch filelib:compile_wildcard(Wc)),
     {'EXIT',{{badpattern,Error},
-	     [{filelib,wildcard,1}|_]}} = (catch filelib:wildcard(Wc)),
+	     [{filelib,wildcard,1,_}|_]}} = (catch filelib:wildcard(Wc)),
     {'EXIT',{{badpattern,Error},
-	     [{filelib,wildcard,2}|_]}} = (catch filelib:wildcard(Wc, ".")).
+	     [{filelib,wildcard,2,_}|_]}} = (catch filelib:wildcard(Wc, ".")).
 
 do_wildcard_1(Dir, Wcf0) ->
     do_wildcard_2(Dir, Wcf0),
diff --git a/lib/stdlib/test/proc_lib_SUITE.erl b/lib/stdlib/test/proc_lib_SUITE.erl
index 1565aa9bba..c95089117c 100644
--- a/lib/stdlib/test/proc_lib_SUITE.erl
+++ b/lib/stdlib/test/proc_lib_SUITE.erl
@@ -328,7 +328,7 @@ otp_6345(doc) ->
     ["'monitor' spawn_opt option"];
 otp_6345(Config) when is_list(Config) ->
     Opts = [link,monitor],
-    {'EXIT', {badarg,[{proc_lib,check_for_monitor,_}|_Stack]}} =
+    {'EXIT', {badarg,[{proc_lib,check_for_monitor,_,_}|_Stack]}} =
 	(catch proc_lib:start(?MODULE, otp_6345_init, [self()],
 			      1000, Opts)),
     ok.
diff --git a/lib/stdlib/test/re_SUITE.erl b/lib/stdlib/test/re_SUITE.erl
index c4817c0d38..3b2e637c84 100644
--- a/lib/stdlib/test/re_SUITE.erl
+++ b/lib/stdlib/test/re_SUITE.erl
@@ -454,115 +454,115 @@ error_handling(Config) when is_list(Config) ->
     % The malformed precomiled RE is detected after 
     % the trap to re:grun from grun, in the grun function clause
     % that handles precompiled expressions
-    ?line {'EXIT',{badarg,[{re,run,["apa",{1,2,3,4},[global]]},
-			   {?MODULE, error_handling,1} | _]}} = 
+    ?line {'EXIT',{badarg,[{re,run,["apa",{1,2,3,4},[global]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:run("apa",{1,2,3,4},[global])),
     % An invalid capture list will also cause a badarg late, 
     % but with a non pre compiled RE, the exception should be thrown by the
     % grun function clause that handles RE's compiled implicitly by
     % the run/3 BIF before trapping.
-    ?line {'EXIT',{badarg,[{re,run,["apa","p",[{capture,[1,{a}]},global]]},
-			   {?MODULE, error_handling,1} | _]}} = 
+    ?line {'EXIT',{badarg,[{re,run,["apa","p",[{capture,[1,{a}]},global]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:run("apa","p",[{capture,[1,{a}]},global])),
     % And so the case of a precompiled expression together with
     % a compile-option (binary and list subject):
     ?line {ok,RE} = re:compile("(p)"),
     ?line {match,[[{1,1},{1,1}]]} = re:run(<<"apa">>,RE,[global]),
     ?line {match,[[{1,1},{1,1}]]} = re:run("apa",RE,[global]),
-    {'EXIT',{badarg,[{re,run,
-                     [<<"apa">>,
-                      {re_pattern,1,0,_},
-                      [global,unicode]]},
-		     {?MODULE, error_handling,1} | _]}} =
+    ?line {'EXIT',{badarg,[{re,run,
+			    [<<"apa">>,
+			     {re_pattern,1,0,_},
+			     [global,unicode]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:run(<<"apa">>,RE,[global,unicode])),
-    {'EXIT',{badarg,[{re,run,
-                     ["apa",
-                      {re_pattern,1,0,_},
-                      [global,unicode]]},
-		     {?MODULE, error_handling,1} | _]}} =
+    ?line {'EXIT',{badarg,[{re,run,
+			    ["apa",
+			     {re_pattern,1,0,_},
+			     [global,unicode]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:run("apa",RE,[global,unicode])),
     ?line {'EXIT',{badarg,_}} = (catch re:run("apa","(p",[])),
     ?line {'EXIT',{badarg,_}} = (catch re:run("apa","(p",[global])),
     % The replace errors:
-    ?line {'EXIT',{badarg,[{re,replace,["apa",{1,2,3,4},"X",[]]},
-			   {?MODULE, error_handling,1} | _]}} =
+    ?line {'EXIT',{badarg,[{re,replace,["apa",{1,2,3,4},"X",[]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:replace("apa",{1,2,3,4},"X",[])),
-    ?line {'EXIT',{badarg,[{re,replace,["apa",{1,2,3,4},"X",[global]]},
-			   {?MODULE, error_handling,1} | _]}} =
+    ?line {'EXIT',{badarg,[{re,replace,["apa",{1,2,3,4},"X",[global]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:replace("apa",{1,2,3,4},"X",[global])),
     ?line {'EXIT',{badarg,[{re,replace,
 			    ["apa",
 			     {re_pattern,1,0,_},
 			     "X",
-			     [unicode]]},
-			   {?MODULE, error_handling,1} | _]}} =
+			     [unicode]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:replace("apa",RE,"X",[unicode])),
     ?line <<"aXa">> = iolist_to_binary(re:replace("apa","p","X",[])),
     ?line {'EXIT',{badarg,[{re,replace,
-			    ["apa","p","X",[{capture,all,binary}]]},
-			   {?MODULE, error_handling,1} | _]}} =
+			    ["apa","p","X",[{capture,all,binary}]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch iolist_to_binary(re:replace("apa","p","X",
 					  [{capture,all,binary}]))),
     ?line {'EXIT',{badarg,[{re,replace,
-			    ["apa","p","X",[{capture,all}]]},
-			   {?MODULE, error_handling,1} | _]}} =
+			    ["apa","p","X",[{capture,all}]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch iolist_to_binary(re:replace("apa","p","X",
 					  [{capture,all}]))),
     ?line {'EXIT',{badarg,[{re,replace,
-			    ["apa","p","X",[{return,banana}]]},
-			   {?MODULE, error_handling,1} | _]}} =
+			    ["apa","p","X",[{return,banana}]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch iolist_to_binary(re:replace("apa","p","X",
 					  [{return,banana}]))),
     ?line {'EXIT',{badarg,_}} = (catch re:replace("apa","(p","X",[])),
     % Badarg, not compile error.
     ?line {'EXIT',{badarg,[{re,replace,
-			    ["apa","(p","X",[{return,banana}]]},
-			   {?MODULE, error_handling,1} | _]}} =
+			    ["apa","(p","X",[{return,banana}]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch iolist_to_binary(re:replace("apa","(p","X",
 					  [{return,banana}]))),
     % And the split errors:
     ?line [<<"a">>,<<"a">>] = (catch re:split("apa","p",[])),
     ?line [<<"a">>,<<"p">>,<<"a">>] = (catch re:split("apa",RE,[])),
-    ?line {'EXIT',{badarg,[{re,split,["apa","p",[global]]},
-			   {?MODULE, error_handling,1} | _]}} = 
+    ?line {'EXIT',{badarg,[{re,split,["apa","p",[global]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:split("apa","p",[global])),
-    ?line {'EXIT',{badarg,[{re,split,["apa","p",[{capture,all}]]},
-			   {?MODULE, error_handling,1} | _]}} = 
+    ?line {'EXIT',{badarg,[{re,split,["apa","p",[{capture,all}]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:split("apa","p",[{capture,all}])),
-    ?line {'EXIT',{badarg,[{re,split,["apa","p",[{capture,all,binary}]]},
-			   {?MODULE, error_handling,1} | _]}} = 
+    ?line {'EXIT',{badarg,[{re,split,["apa","p",[{capture,all,binary}]],_},
+			   {?MODULE, error_handling,1,_} | _]}} =
 	(catch re:split("apa","p",[{capture,all,binary}])),
-    ?line {'EXIT',{badarg,[{re,split,["apa",{1,2,3,4},[]]},
-			   {?MODULE, error_handling,1} | _]}} =
+    ?line {'EXIT',{badarg,[{re,split,["apa",{1,2,3,4},[]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:split("apa",{1,2,3,4})),
-    ?line {'EXIT',{badarg,[{re,split,["apa",{1,2,3,4},[]]},
-			   {?MODULE, error_handling,1} | _]}} =
+    ?line {'EXIT',{badarg,[{re,split,["apa",{1,2,3,4},[]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:split("apa",{1,2,3,4},[])),
     ?line {'EXIT',{badarg,[{re,split,
 			    ["apa",
 			     RE,
-			     [unicode]]},
-			   {?MODULE, error_handling,1} | _]}} =
+			     [unicode]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:split("apa",RE,[unicode])),
     ?line {'EXIT',{badarg,[{re,split,
 			    ["apa",
 			     RE,
-			     [{return,banana}]]},
-			   {?MODULE, error_handling,1} | _]}} =
+			     [{return,banana}]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:split("apa",RE,[{return,banana}])),
     ?line {'EXIT',{badarg,[{re,split,
 			    ["apa",
 			     RE,
-			     [banana]]},
-			   {?MODULE, error_handling,1} | _]}} =
+			     [banana]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:split("apa",RE,[banana])),
     ?line {'EXIT',{badarg,_}} = (catch re:split("apa","(p")),
     %Exception on bad argument, not compilation error
     ?line {'EXIT',{badarg,[{re,split,
 			    ["apa",
 			     "(p",
-			     [banana]]},
-			   {?MODULE, error_handling,1} | _]}} = 
+			     [banana]],_},
+			   {?MODULE,error_handling,1,_} | _]}} =
 	(catch re:split("apa","(p",[banana])),
     ?t:timetrap_cancel(Dog),
     ok.
diff --git a/lib/stdlib/test/shell_SUITE.erl b/lib/stdlib/test/shell_SUITE.erl
index 8273377ba1..b6019b86f0 100644
--- a/lib/stdlib/test/shell_SUITE.erl
+++ b/lib/stdlib/test/shell_SUITE.erl
@@ -2388,12 +2388,12 @@ otp_6554(Config) when is_list(Config) ->
         comm_err(<<"V = lists:seq(1, 20), case V of a -> ok end.">>),
     ?line "exception error: no function clause matching" = 
         comm_err(<<"fun(P) when is_pid(P) -> true end(a).">>),
-    ?line "exception error: {function_clause,[{erl_eval,do_apply,[unproper|list]}"++_ =
+    ?line "exception error: {function_clause," =
         comm_err(<<"erlang:error(function_clause, [unproper | list]).">>),
     ?line "exception error: function_clause" =
         comm_err(<<"erlang:error(function_clause, 4).">>),
     %% Cheating:
-    ?line "exception error: no function clause matching erl_eval:do_apply(4)" = 
+    ?line "exception error: no function clause matching erl_eval:do_apply(4)" ++ _ = 
         comm_err(<<"erlang:error(function_clause, [4]).">>),
     ?line "exception error: no function clause matching" ++ _ = 
         comm_err(<<"fun(a, b, c, d) -> foo end"
@@ -2406,7 +2406,7 @@ otp_6554(Config) when is_list(Config) ->
         comm_err(<<"fun(P, q) when is_pid(P) -> true end(a, b).">>),
     ?line "exception error: no function clause matching lists:reverse(" ++ _ = 
         comm_err(<<"F=fun() -> hello end, lists:reverse(F).">>),
-    ?line "exception error: no function clause matching lists:reverse(34)" = 
+    ?line "exception error: no function clause matching lists:reverse(34) (lists.erl, line " ++ _ = 
         comm_err(<<"lists:reverse(34).">>),
     ?line "exception error: no true branch found when evaluating an if expression" = 
         comm_err(<<"if length([a,b]) > 17 -> a end.">>),
diff --git a/lib/stdlib/test/sofs_SUITE.erl b/lib/stdlib/test/sofs_SUITE.erl
index d6f88a655e..73b282149a 100644
--- a/lib/stdlib/test/sofs_SUITE.erl
+++ b/lib/stdlib/test/sofs_SUITE.erl
@@ -1879,11 +1879,11 @@ digraph(Conf) when is_list(Conf) ->
 
     ?line {'EXIT', {badarg, _}} = 
         (catch family_to_digraph(set([a]))),
-    ?line {'EXIT', {badarg, [{sofs,family_to_digraph,[_,_]}|_]}} =
+    ?line {'EXIT', {badarg, [{sofs,family_to_digraph,[_,_],_}|_]}} =
         (catch family_to_digraph(set([a]), [foo])),
-    ?line {'EXIT', {badarg, [{sofs,family_to_digraph,[_,_]}|_]}} =
+    ?line {'EXIT', {badarg, [{sofs,family_to_digraph,[_,_],_}|_]}} =
         (catch family_to_digraph(F, [foo])),
-    ?line {'EXIT', {cyclic, [{sofs,family_to_digraph,[_,_]}|_]}} =
+    ?line {'EXIT', {cyclic, [{sofs,family_to_digraph,[_,_],_}|_]}} =
         (catch family_to_digraph(family([{a,[a]}]),[acyclic])),
 
     ?line G1 = family_to_digraph(E),
diff --git a/lib/test_server/include/test_server.hrl b/lib/test_server/include/test_server.hrl
index 4b96d84ace..36e7e1f83d 100644
--- a/lib/test_server/include/test_server.hrl
+++ b/lib/test_server/include/test_server.hrl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1996-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2011. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -20,11 +20,10 @@
 -ifdef(line_trace).
 -line_trace(true).
 -define(line,
-	put(test_server_loc,{?MODULE,?LINE}),
 	io:format(lists:concat([?MODULE,",",integer_to_list(?LINE),": ~p"]),
 		  [erlang:now()]),).
 -else.
--define(line,put(test_server_loc,{?MODULE,?LINE}),).
+-define(line,).
 -endif.
 -define(t,test_server).
 -define(config,test_server:lookup_config).
diff --git a/lib/test_server/include/test_server_line.hrl b/lib/test_server/include/test_server_line.hrl
index 60ef860883..3c309d3ee5 100644
--- a/lib/test_server/include/test_server_line.hrl
+++ b/lib/test_server/include/test_server_line.hrl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2004-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2004-2011. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -16,5 +16,4 @@
 %% 
 %% %CopyrightEnd%
 %%
--compile({parse_transform,test_server_line}).
 
diff --git a/lib/test_server/src/Makefile b/lib/test_server/src/Makefile
index 63a585d526..4bc51873c2 100644
--- a/lib/test_server/src/Makefile
+++ b/lib/test_server/src/Makefile
@@ -43,7 +43,6 @@ MODULES= test_server_ctrl \
 	 test_server_node \
 	 test_server \
 	 test_server_sup \
-	 test_server_line \
 	 test_server_h \
 	 erl2html2 \
 	 vxworks_client
diff --git a/lib/test_server/src/test_server.app.src b/lib/test_server/src/test_server.app.src
index af2d4dc2cb..7e87583a7b 100644
--- a/lib/test_server/src/test_server.app.src
+++ b/lib/test_server/src/test_server.app.src
@@ -24,7 +24,6 @@
 	     test_server_ctrl,
 	     test_server,
 	     test_server_h,
-	     test_server_line,
 	     test_server_node,
 	     test_server_sup
 	    ]},
diff --git a/lib/test_server/src/test_server.erl b/lib/test_server/src/test_server.erl
index 591329b361..04f92c5738 100644
--- a/lib/test_server/src/test_server.erl
+++ b/lib/test_server/src/test_server.erl
@@ -759,7 +759,6 @@ run_test_case_msgloop(Ref, Pid, CaptureStdout, Terminate, Comment, CurrConf) ->
 			    run_test_case_msgloop(Ref,Pid,CaptureStdout,Terminate,
 						  Comment,undefined);
 			Loc1 ->
-			    {Mod,Func} = get_mf(Loc1),
 			    %% call end_per_testcase on a separate process,
 			    %% only so that the user has a chance to clean up
 			    %% after init_per_testcase, even after a timetrap timeout
@@ -775,6 +774,7 @@ run_test_case_msgloop(Ref, Pid, CaptureStdout, Terminate, Comment, CurrConf) ->
 							  TVal),
 					{EndConfPid,{Mod,Func},Conf};
 				    _ ->
+					{Mod,Func} = get_mf(Loc1),
 					%% The framework functions mustn't execute on this
 					%% group leader process or io will cause deadlock,
 					%% so we spawn a dedicated process for the operation
@@ -810,7 +810,6 @@ run_test_case_msgloop(Ref, Pid, CaptureStdout, Terminate, Comment, CurrConf) ->
 			    run_test_case_msgloop(Ref,Pid,CaptureStdout,Terminate,
 						  Comment,undefined);
 			Loc1 ->
-			    {Mod,Func} = get_mf(Loc1),
 			    %% call end_per_testcase on a separate process, only so
 			    %% that the user has a chance to clean up after init_per_testcase,
 			    %% even after abortion
@@ -828,6 +827,7 @@ run_test_case_msgloop(Ref, Pid, CaptureStdout, Terminate, Comment, CurrConf) ->
 							  TVal),
 					{EndConfPid,{Mod,Func},Conf};
 				    _ ->
+					{Mod,Func} = get_mf(Loc1),
 					spawn_fw_call(Mod,Func,Pid,ErrorMsg,
 						      Loc1,self(),Comment),
 					undefined
@@ -1307,57 +1307,62 @@ init_per_testcase(Mod, Func, Args) ->
 	false -> code:load_file(Mod);
 	_ -> ok
     end,
-    %% init_per_testcase defined, returns new configuration
-    case erlang:function_exported(Mod,init_per_testcase,2) of
+    case erlang:function_exported(Mod, init_per_testcase, 2) of
 	true ->
-	    case catch my_apply(Mod, init_per_testcase, [Func|Args]) of
-		{'$test_server_ok',{Skip,Reason}} when Skip==skip;
-						       Skip==skipped ->
-		    {skip,Reason};
-		{'$test_server_ok',Res={skip_and_save,_,_}} ->
-		    Res;
-		{'$test_server_ok',NewConf} when is_list(NewConf) ->
-		    case lists:filter(fun(T) when is_tuple(T) -> false;
-					 (_) -> true end, NewConf) of
-			[] ->
-			    {ok,NewConf};
-			Bad ->
-			    group_leader() ! {printout,12,
-					      "ERROR! init_per_testcase has returned "
-					      "bad elements in Config: ~p\n",[Bad]},
-			    {skip,{failed,{Mod,init_per_testcase,bad_return}}}
-		    end;
-		{'$test_server_ok',Res={fail,_Reason}} ->
-		    Res;
-		{'$test_server_ok',_Other} ->
-		    group_leader() ! {printout,12,
-				      "ERROR! init_per_testcase did not return "
-				      "a Config list.\n",[]},
-		    {skip,{failed,{Mod,init_per_testcase,bad_return}}};
-		{'EXIT',Reason} ->
-		    Line = get_loc(),
-		    FormattedLoc = test_server_sup:format_loc(mod_loc(Line)),
-		    group_leader() ! {printout,12,
-				      "ERROR! init_per_testcase crashed!\n"
-				      "\tLocation: ~s\n\tReason: ~p\n",
-				      [FormattedLoc,Reason]},
-		    {skip,{failed,{Mod,init_per_testcase,Reason}}};
-		Other ->
-		    Line = get_loc(),
-		    FormattedLoc = test_server_sup:format_loc(mod_loc(Line)),
-		    group_leader() ! {printout,12,
-				      "ERROR! init_per_testcase thrown!\n"
-				      "\tLocation: ~s\n\tReason: ~p\n",
-				      [FormattedLoc, Other]},
-		    {skip,{failed,{Mod,init_per_testcase,Other}}}
-	    end;
+	    do_init_per_testcase(Mod, [Func|Args]);
 	false ->
-%% Optional init_per_testcase not defined
-%% keep quiet.
+	    %% Optional init_per_testcase is not defined -- keep quiet.
 	    [Config] = Args,
 	    {ok, Config}
     end.
 
+do_init_per_testcase(Mod, Args) ->
+    try	apply(Mod, init_per_testcase, Args) of
+	{Skip,Reason} when Skip =:= skip; Skip =:= skipped ->
+	    {skip,Reason};
+	{skip_and_save,_,_}=Res ->
+	    Res;
+	NewConf when is_list(NewConf) ->
+	    case lists:filter(fun(T) when is_tuple(T) -> false;
+				 (_) -> true end, NewConf) of
+		[] ->
+		    {ok,NewConf};
+		Bad ->
+		    group_leader() ! {printout,12,
+				      "ERROR! init_per_testcase has returned "
+				      "bad elements in Config: ~p\n",[Bad]},
+		    {skip,{failed,{Mod,init_per_testcase,bad_return}}}
+	    end;
+	{fail,_Reason}=Res ->
+	    Res;
+	_Other ->
+	    group_leader() ! {printout,12,
+			      "ERROR! init_per_testcase did not return "
+			      "a Config list.\n",[]},
+	    {skip,{failed,{Mod,init_per_testcase,bad_return}}}
+    catch
+	throw:Other ->
+	    set_loc(erlang:get_stacktrace()),
+	    Line = get_loc(),
+	    FormattedLoc = test_server_sup:format_loc(mod_loc(Line)),
+	    group_leader() ! {printout,12,
+			      "ERROR! init_per_testcase thrown!\n"
+			      "\tLocation: ~s\n\tReason: ~p\n",
+			      [FormattedLoc, Other]},
+	    {skip,{failed,{Mod,init_per_testcase,Other}}};
+	_:Reason0 ->
+	    Stk = erlang:get_stacktrace(),
+	    Reason = {Reason0,Stk},
+	    set_loc(Stk),
+	    Line = get_loc(),
+	    FormattedLoc = test_server_sup:format_loc(mod_loc(Line)),
+	    group_leader() ! {printout,12,
+			      "ERROR! init_per_testcase crashed!\n"
+			      "\tLocation: ~s\n\tReason: ~p\n",
+			      [FormattedLoc,Reason]},
+	    {skip,{failed,{Mod,init_per_testcase,Reason}}}
+    end.
+
 end_per_testcase(Mod, Func, Conf) ->
     case erlang:function_exported(Mod,end_per_testcase,2) of
 	true ->
@@ -1375,57 +1380,79 @@ end_per_testcase(Mod, Func, Conf) ->
 do_end_per_testcase(Mod,EndFunc,Func,Conf) ->
     put(test_server_init_or_end_conf,{EndFunc,Func}),
     put(test_server_loc, {Mod,{EndFunc,Func}}),
-    case catch my_apply(Mod, EndFunc, [Func,Conf]) of
-	{'$test_server_ok',SaveCfg={save_config,_}} ->
+    try Mod:EndFunc(Func, Conf) of
+	{save_config,_}=SaveCfg ->
 	    SaveCfg;
-	{'$test_server_ok',{fail,_}=Fail} ->
+	{fail,_}=Fail ->
 	    Fail;
-	{'$test_server_ok',_} ->
-	    ok;
-	{'EXIT',Reason} = Why ->
+	_ ->
+	    ok
+    catch
+	throw:Other ->
+	    set_loc(erlang:get_stacktrace()),
 	    comment(io_lib:format("<font color=\"red\">"
-				  "WARNING: ~w crashed!"
+				  "WARNING: ~w thrown!"
 				  "</font>\n",[EndFunc])),
 	    group_leader() ! {printout,12,
-			      "WARNING: ~w crashed!\n"
+			      "WARNING: ~w thrown!\n"
 			      "Reason: ~p\n"
 			      "Line: ~s\n",
-			      [EndFunc, Reason,
+			      [EndFunc, Other,
 			       test_server_sup:format_loc(
 				 mod_loc(get_loc()))]},
-	    {failed,{Mod,end_per_testcase,Why}};
-	Other ->
+	    {failed,{Mod,end_per_testcase,Other}};
+	  Class:Reason ->
+	    Stk = erlang:get_stacktrace(),
+	    set_loc(Stk),
+	    Why = case Class of
+		      exit -> {'EXIT',Reason};
+		      error -> {'EXIT',{Reason,Stk}}
+		  end,
 	    comment(io_lib:format("<font color=\"red\">"
-				  "WARNING: ~w thrown!"
+				  "WARNING: ~w crashed!"
 				  "</font>\n",[EndFunc])),
 	    group_leader() ! {printout,12,
-			      "WARNING: ~w thrown!\n"
+			      "WARNING: ~w crashed!\n"
 			      "Reason: ~p\n"
 			      "Line: ~s\n",
-			      [EndFunc, Other,
+			      [EndFunc, Reason,
 			       test_server_sup:format_loc(
 				 mod_loc(get_loc()))]},
-	    {failed,{Mod,end_per_testcase,Other}}
+	    {failed,{Mod,end_per_testcase,Why}}
     end.
 
 get_loc() ->
-    case catch test_server_line:get_lines() of
-	[] ->
-	    get(test_server_loc);
-	{'EXIT',_} ->
-	    get(test_server_loc);
-	Loc ->
-	    Loc
-    end.
+    get(test_server_loc).
 
 get_loc(Pid) ->
-    {dictionary,Dict} = process_info(Pid, dictionary),
-    lists:foreach(fun({Key,Val}) -> put(Key,Val) end,Dict),
+    [{current_stacktrace,Stk0},{dictionary,Dict}] =
+	process_info(Pid, [current_stacktrace,dictionary]),
+    lists:foreach(fun({Key,Val}) -> put(Key, Val) end, Dict),
+    Stk = [rewrite_loc_item(Loc) || Loc <- Stk0],
+    put(test_server_loc, Stk),
     get_loc().
 
-get_mf([{M,F,_}|_]) -> {M,F};
-get_mf([{M,F}|_])   -> {M,F};
-get_mf(_)           -> {undefined,undefined}.
+%% find the latest known Suite:Testcase
+get_mf(MFs) ->
+    get_mf(MFs, {undefined,undefined}).
+
+get_mf([MF|MFs], Found) when is_tuple(MF) ->
+    ModFunc = {Mod,_} = case MF of
+			    {M,F,_} -> {M,F};
+			    MF -> MF
+			end,
+    case is_suite(Mod) of
+	true -> ModFunc;
+	false -> get_mf(MFs, ModFunc)
+    end;
+get_mf(_, Found) ->
+    Found.
+
+is_suite(Mod) ->
+    case lists:reverse(atom_to_list(Mod)) of
+	"ETIUS" ++ _ -> true;
+	_ -> false
+    end.
 
 mod_loc(Loc) ->
     %% handle diff line num versions
@@ -1498,16 +1525,22 @@ lookup_config(Key,Config) ->
 %% timer:tc/3
 ts_tc(M, F, A) ->
     Before = erlang:now(),
-    Val = (catch my_apply(M, F, A)),
+    Result = try
+		 apply(M, F, A)
+	     catch
+		 Type:Reason ->
+		     Stk = erlang:get_stacktrace(),
+		     set_loc(Stk),
+		     case Type of
+			 throw ->
+			     {failed,{thrown,Reason}};
+			 error ->
+			     {'EXIT',{Reason,Stk}};
+			 exit ->
+			     {'EXIT',Reason}
+		     end
+	     end,
     After = erlang:now(),
-    Result = case Val of
-		 {'$test_server_ok', R} ->
-		     R; % test case ok
-		 {'EXIT',_Reason} = R ->
-		     R; % test case crashed
-		 Other ->
-		     {failed, {thrown,Other}} % test case was thrown
-	  end,
     Elapsed =
 	(element(1,After)*1000000000000
 	 +element(2,After)*1000000+element(3,After)) -
@@ -1515,8 +1548,12 @@ ts_tc(M, F, A) ->
 	 +element(2,Before)*1000000+element(3,Before)),
     {Elapsed, Result}.
 
-my_apply(M, F, A) ->
-    {'$test_server_ok',apply(M, F, A)}.
+set_loc(Stk) ->
+    Loc = [rewrite_loc_item(I) || {_,_,_,_}=I <- Stk],
+    put(test_server_loc, Loc).
+
+rewrite_loc_item({M,F,_,Loc}) ->
+    {M,F,proplists:get_value(line, Loc, 0)}.
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
diff --git a/lib/test_server/src/test_server_line.erl b/lib/test_server/src/test_server_line.erl
deleted file mode 100644
index 848a9c23dd..0000000000
--- a/lib/test_server/src/test_server_line.erl
+++ /dev/null
@@ -1,387 +0,0 @@
-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2004-2010. All Rights Reserved.
-%%
-%% The contents of this file are subject to the Erlang Public License,
-%% Version 1.1, (the "License"); you may not use this file except in
-%% compliance with the License. You should have received a copy of the
-%% Erlang Public License along with this software. If not, it can be
-%% retrieved online at http://www.erlang.org/.
-%%
-%% Software distributed under the License is distributed on an "AS IS"
-%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
-%% the License for the specific language governing rights and limitations
-%% under the License.
-%%
-%% %CopyrightEnd%
-%%
--module(test_server_line).
-
-%% User interface
--export([get_lines/0]).
--export([clear/0]).
-
-%% Parse transform functions
--export([parse_transform/2]).
--export(['$test_server_line'/3]).
--export(['$test_server_lineQ'/3]).
--export([trace_line/3]).
-
--define(TEST_SERVER_LINE_SIZE, 10).
-%-define(STORAGE_FUNCTION, '$test_server_line').
--define(STORAGE_FUNCTION, '$test_server_lineQ').
-
--include("test_server.hrl").
-
--record(vars, {module,                      % atom() Module name
-	       function,                    % atom() Function name
-	       arity,                       % int()  Function arity
-	       lines,                       % [int()]  seen lines
-	       is_guard=false,              % boolean()
-	       no_lines=[],                 % [{atom(),integer()}] 
-					    %    Functions to exclude
-	       line_trace=false
-	      }).
-
-
-
-
-%% Process dictionary littering variant
-%%
-
-'$test_server_line'(Mod, Func, Line) ->
-    {Prev,Next} = 
-	case get('$test_server_line') of
-	    I when is_integer(I) ->
-		if  1 =< I, I < ?TEST_SERVER_LINE_SIZE -> {I,I+1};
-		    true -> {?TEST_SERVER_LINE_SIZE,1}
-		end;
-	    _ -> {?TEST_SERVER_LINE_SIZE,1}
-	end,
-    PrevTag = {'$test_server_line',Prev},
-    case get(PrevTag) of
-	{Mod,Func,_} -> put(PrevTag, {Mod,Func,Line});
-	_ -> 
-	    put({'$test_server_line',Next}, {Mod,Func,Line}),
-	    put('$test_server_line', Next)
-    end, ok.
-
-test_server_line_get() ->
-    case get('$test_server_line') of
-	I when is_integer(I), 1 =< I, I =< ?TEST_SERVER_LINE_SIZE ->
-	    test_server_line_get_1(?TEST_SERVER_LINE_SIZE, I, []);
-	_ -> []
-    end.
-
-test_server_line_get_1(0, _I, R) ->
-    R;
-test_server_line_get_1(Cnt, I, R) ->
-    J = if  I < ?TEST_SERVER_LINE_SIZE -> I+1;
-	    true -> 1 end,
-    case get({'$test_server_line',J}) of
-	undefined -> 
-	    %% Less than ?TEST_SERVER_LINE_SIZE number of lines stored
-	    %% Start from line 1 and stop at actutual number of lines
-	    case get({'$test_server_line',1}) of 
-		undefined -> R; % no lines at all stored
-		E -> test_server_line_get_1(I-1,1,[E|R])
-	    end;
-	E -> 
-	    test_server_line_get_1(Cnt-1, J, [E|R])
-    end.
-
-test_server_line_clear() ->
-    Is = lists:seq(1,?TEST_SERVER_LINE_SIZE),
-    lists:foreach(fun (I) -> erase({'$test_server_line',I}) end, Is),
-    erase('$test_server_line'),
-    ok.
-
-
-%% Queue variant, uses just one process dictionary entry
-%%
-
-'$test_server_lineQ'(Mod, Func, Line) ->		
-    case get('$test_server_lineQ') of
-	{I,Q} when is_integer(I), 1 =< I, I =< ?TEST_SERVER_LINE_SIZE -> 
-	    case queue:head(Q) of
-		{Mod,Func,_} ->
-		    %% Replace queue head
-		    put('$test_server_lineQ',
-			{I,queue:cons({Mod,Func,Line}, queue:tail(Q))});
-		_ when I < ?TEST_SERVER_LINE_SIZE ->
-		    put('$test_server_lineQ',
-			{I+1,queue:cons({Mod,Func,Line}, Q)});
-		_ -> 
-		    %% Waste last in queue
-		    put('$test_server_lineQ',
-			{I,queue:cons({Mod,Func,Line}, queue:lait(Q))})
-	    end;
-	_ -> 
-	    Q = queue:new(),
-	    put('$test_server_lineQ', {1,queue:cons({Mod,Func,Line}, Q)})
-    end, ok.
-
-%test_server_lineQ_get() ->
-%    case get('$test_server_lineQ') of
-%	{I,Q} when integer(I), 1 =< I, I =< ?TEST_SERVER_LINE_SIZE -> 
-%	    queue:to_list(Q);
-%	_ -> []
-%    end.
-
-test_server_lineQ_clear() ->
-    erase('$test_server_lineQ'),
-    ok.
-
-
-%% Get line - check if queue or dictionary is used, then get the lines
-%%
-
-get_lines() ->
-    case get('$test_server_lineQ') of
-	{I,Q} when is_integer(I), 1 =< I, I =< ?TEST_SERVER_LINE_SIZE -> 
-	    queue:to_list(Q);
-	_ -> 
-	    test_server_line_get()
-    end.
-	
-%% Clear all dictionary entries
-%%
-clear() ->
-    test_server_line_clear(),
-    test_server_lineQ_clear().
-
-
-trace_line(Mod,Func,Line) ->
-    io:format(lists:concat([Mod,":",Func,",",integer_to_list(Line),": ~p"]),
-	      [erlang:now()]).
-
-
-%%%=================================================================
-%%%========= ****   PARSE TRANSFORM    **** ========================
-%%%=================================================================
-parse_transform(Forms, _Options) ->
-    transform(Forms, _Options).
-
-%% forms(Fs) -> lists:map(fun (F) -> form(F) end, Fs).
-
-transform(Forms, _Options)->
-    Vars0 = #vars{},
-    {ok, MungedForms, _Vars} = transform(Forms, [], Vars0),
-    MungedForms.
-    
-
-transform([Form|Forms], MungedForms, Vars) ->
-    case munge(Form, Vars) of
-	ignore ->
-	    transform(Forms, MungedForms, Vars);
-	{MungedForm, Vars2} ->
-	    transform(Forms, [MungedForm|MungedForms], Vars2)
-    end;
-transform([], MungedForms, Vars) ->
-    {ok, lists:reverse(MungedForms), Vars}.
-
-%% This code traverses the abstract code, stored as the abstract_code
-%% chunk in the BEAM file, as described in absform(3) for Erlang/OTP R8B
-%% (Vsn=abstract_v2).
-%% The abstract format after preprocessing differs slightly from the abstract
-%% format given eg using epp:parse_form, this has been noted in comments.
-munge(Form={attribute,_,module,Module}, Vars) ->
-    Vars2 = Vars#vars{module=Module},
-    {Form, Vars2};
-
-munge(Form={attribute,_,no_lines,Funcs}, Vars) ->
-    Vars2 = Vars#vars{no_lines=Funcs},
-    {Form, Vars2};
-
-munge(Form={attribute,_,line_trace,_}, Vars) ->
-    Vars2 = Vars#vars{line_trace=true},
-    {Form, Vars2};
-
-munge({function,0,module_info,_Arity,_Clauses}, _Vars) ->
-    ignore; % module_info will be added again when the forms are recompiled
-munge(Form = {function,Line,Function,Arity,Clauses}, Vars) ->
-    case lists:member({Function,Arity},Vars#vars.no_lines) of
-	true ->
-	    %% Line numbers in this function shall not be stored
-	    {Form,Vars};
-	false ->
-	    Vars2 = Vars#vars{function=Function,
-			      arity=Arity,
-			      lines=[]},
-	    {MungedClauses, Vars3} = munge_clauses(Clauses, Vars2, []),
-	    {{function,Line,Function,Arity,MungedClauses}, Vars3}
-    end;
-munge(Form, Vars) -> % attributes
-    {Form, Vars}.
-
-munge_clauses([{clause,Line,Pattern,Guards,Body}|Clauses], Vars, MClauses) ->
-    {MungedGuards, _Vars} = munge_exprs(Guards, Vars#vars{is_guard=true},[]),
-    {MungedBody, Vars2} = munge_body(Body, Vars, []),
-    munge_clauses(Clauses, Vars2,
-		  [{clause,Line,Pattern,MungedGuards,MungedBody}|
-		   MClauses]);
-munge_clauses([], Vars, MungedClauses) -> 
-    {lists:reverse(MungedClauses), Vars}.
-
-munge_body([Expr|Body], Vars, MungedBody) ->
-    %% Here is the place to add a call to storage function!
-    Line = element(2, Expr),
-    Lines = Vars#vars.lines,
-    case lists:member(Line,Lines) of
-	true -> % already a bump at this line!
-	    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-	    munge_body(Body, Vars2, [MungedExpr|MungedBody]);
-	false ->
-	    Bump = {call, 0, {remote,0,
-			      {atom,0,?MODULE},
-			      {atom,0,?STORAGE_FUNCTION}},
-		    [{atom,0,Vars#vars.module},
-		     {atom, 0, Vars#vars.function},
-		     {integer, 0, Line}]},
-	    Lines2 = [Line|Lines],
-	    
-	    {MungedExpr, Vars2} = munge_expr(Expr, Vars#vars{lines=Lines2}),
-	    MungedBody2 = 
-		if Vars#vars.line_trace ->
-			LineTrace = {call, 0, {remote,0,
-					       {atom,0,?MODULE},
-					       {atom,0,trace_line}},
-				     [{atom,0,Vars#vars.module},
-				      {atom, 0, Vars#vars.function},
-				      {integer, 0, Line}]},
-			[MungedExpr,LineTrace,Bump|MungedBody];
-		   true ->
-			[MungedExpr,Bump|MungedBody]
-		end,
-	    munge_body(Body, Vars2, MungedBody2)
-    end;
-munge_body([], Vars, MungedBody) ->
-    {lists:reverse(MungedBody), Vars}.
-
-munge_expr({match,Line,ExprL,ExprR}, Vars) ->
-    {MungedExprL, Vars2} = munge_expr(ExprL, Vars),
-    {MungedExprR, Vars3} = munge_expr(ExprR, Vars2),
-    {{match,Line,MungedExprL,MungedExprR}, Vars3};
-munge_expr({tuple,Line,Exprs}, Vars) ->
-    {MungedExprs, Vars2} = munge_exprs(Exprs, Vars, []),
-    {{tuple,Line,MungedExprs}, Vars2};
-munge_expr({record,Line,Expr,Exprs}, Vars) ->
-    %% Only for Vsn=raw_abstract_v1
-    {MungedExprName, Vars2} = munge_expr(Expr, Vars),
-    {MungedExprFields, Vars3} = munge_exprs(Exprs, Vars2, []),
-    {{record,Line,MungedExprName,MungedExprFields}, Vars3};
-munge_expr({record_field,Line,ExprL,ExprR}, Vars) ->
-    %% Only for Vsn=raw_abstract_v1
-    {MungedExprL, Vars2} = munge_expr(ExprL, Vars),
-    {MungedExprR, Vars3} = munge_expr(ExprR, Vars2),
-    {{record_field,Line,MungedExprL,MungedExprR}, Vars3};
-munge_expr({cons,Line,ExprH,ExprT}, Vars) ->
-    {MungedExprH, Vars2} = munge_expr(ExprH, Vars),
-    {MungedExprT, Vars3} = munge_expr(ExprT, Vars2),
-    {{cons,Line,MungedExprH,MungedExprT}, Vars3};
-munge_expr({op,Line,Op,ExprL,ExprR}, Vars) ->
-    {MungedExprL, Vars2} = munge_expr(ExprL, Vars),
-    {MungedExprR, Vars3} = munge_expr(ExprR, Vars2),
-    {{op,Line,Op,MungedExprL,MungedExprR}, Vars3};
-munge_expr({op,Line,Op,Expr}, Vars) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    {{op,Line,Op,MungedExpr}, Vars2};
-munge_expr({'catch',Line,Expr}, Vars) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    {{'catch',Line,MungedExpr}, Vars2};
-munge_expr({call,Line1,{remote,Line2,ExprM,ExprF},Exprs},
-	   Vars) when Vars#vars.is_guard==false->
-    {MungedExprM, Vars2} = munge_expr(ExprM, Vars),
-    {MungedExprF, Vars3} = munge_expr(ExprF, Vars2),
-    {MungedExprs, Vars4} = munge_exprs(Exprs, Vars3, []),
-    {{call,Line1,{remote,Line2,MungedExprM,MungedExprF},MungedExprs}, Vars4};
-munge_expr({call,Line1,{remote,_Line2,_ExprM,ExprF},Exprs},
-	   Vars) when Vars#vars.is_guard==true ->
-    %% Difference in abstract format after preprocessing: BIF calls in guards
-    %% are translated to {remote,...} (which is not allowed as source form)
-    %% NOT NECESSARY FOR Vsn=raw_abstract_v1
-    munge_expr({call,Line1,ExprF,Exprs}, Vars);
-munge_expr({call,Line,Expr,Exprs}, Vars) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    {MungedExprs, Vars3} = munge_exprs(Exprs, Vars2, []),
-    {{call,Line,MungedExpr,MungedExprs}, Vars3};
-munge_expr({lc,Line,Expr,LC}, Vars) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    {MungedLC, Vars3} = munge_lc(LC, Vars2, []),
-    {{lc,Line,MungedExpr,MungedLC}, Vars3};
-munge_expr({block,Line,Body}, Vars) ->
-    {MungedBody, Vars2} = munge_body(Body, Vars, []),
-    {{block,Line,MungedBody}, Vars2};
-munge_expr({'if',Line,Clauses}, Vars) -> 
-    {MungedClauses,Vars2} = munge_clauses(Clauses, Vars, []),
-    {{'if',Line,MungedClauses}, Vars2};
-munge_expr({'case',Line,Expr,Clauses}, Vars) ->
-    {MungedExpr,Vars2} = munge_expr(Expr,Vars),
-    {MungedClauses,Vars3} = munge_clauses(Clauses, Vars2, []),
-    {{'case',Line,MungedExpr,MungedClauses}, Vars3};
-munge_expr({'receive',Line,Clauses}, Vars) -> 
-    {MungedClauses,Vars2} = munge_clauses(Clauses, Vars, []),
-    {{'receive',Line,MungedClauses}, Vars2};
-munge_expr({'receive',Line,Clauses,Expr,Body}, Vars) ->
-    {MungedClauses,Vars2} = munge_clauses(Clauses, Vars, []),
-    {MungedExpr, Vars3} = munge_expr(Expr, Vars2),
-    {MungedBody, Vars4} = munge_body(Body, Vars3, []),
-    {{'receive',Line,MungedClauses,MungedExpr,MungedBody}, Vars4};
-munge_expr({'try',Line,Exprs,Clauses,CatchClauses,After}, Vars) ->
-    {MungedExprs, Vars1} = munge_exprs(Exprs, Vars, []),
-    {MungedClauses, Vars2} = munge_clauses(Clauses, Vars1, []),
-    {MungedCatchClauses, Vars3} = munge_clauses(CatchClauses, Vars2, []),
-    {MungedAfter, Vars4} = munge_body(After, Vars3, []),
-    {{'try',Line,MungedExprs,MungedClauses,MungedCatchClauses,MungedAfter}, 
-     Vars4};
-%% Difference in abstract format after preprocessing: Funs get an extra
-%% element Extra.
-%% NOT NECESSARY FOR Vsn=raw_abstract_v1
-munge_expr({'fun',Line,{function,Name,Arity},_Extra}, Vars) ->
-    {{'fun',Line,{function,Name,Arity}}, Vars};
-munge_expr({'fun',Line,{clauses,Clauses},_Extra}, Vars) ->
-    {MungedClauses,Vars2}=munge_clauses(Clauses, Vars, []),
-    {{'fun',Line,{clauses,MungedClauses}}, Vars2};
-munge_expr({'fun',Line,{clauses,Clauses}}, Vars) ->
-    %% Only for Vsn=raw_abstract_v1
-    {MungedClauses,Vars2}=munge_clauses(Clauses, Vars, []),
-    {{'fun',Line,{clauses,MungedClauses}}, Vars2};
-munge_expr({bc,Line,Expr,LC}, Vars) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    {MungedLC, Vars3} = munge_lc(LC, Vars2, []),
-    {{bc,Line,MungedExpr,MungedLC}, Vars3};
-munge_expr(Form, Vars) -> % var|char|integer|float|string|atom|nil|bin|eof
-    {Form, Vars}.
-
-munge_exprs([Expr|Exprs], Vars, MungedExprs) when Vars#vars.is_guard==true,
-						  is_list(Expr) ->
-    {MungedExpr, _Vars} = munge_exprs(Expr, Vars, []),
-    munge_exprs(Exprs, Vars, [MungedExpr|MungedExprs]);
-munge_exprs([Expr|Exprs], Vars, MungedExprs) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    munge_exprs(Exprs, Vars2, [MungedExpr|MungedExprs]);
-munge_exprs([], Vars, MungedExprs) ->
-    {lists:reverse(MungedExprs), Vars}.
-
-munge_lc([{generate,Line,Pattern,Expr}|LC], Vars, MungedLC) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    munge_lc(LC, Vars2, [{generate,Line,Pattern,MungedExpr}|MungedLC]);
-munge_lc([{b_generate,Line,Pattern,Expr}|LC], Vars, MungedLC) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    munge_lc(LC, Vars2, [{b_generate,Line,Pattern,MungedExpr}|MungedLC]);
-munge_lc([Expr|LC], Vars, MungedLC) ->
-    {MungedExpr, Vars2} = munge_expr(Expr, Vars),
-    munge_lc(LC, Vars2, [MungedExpr|MungedLC]);
-munge_lc([], Vars, MungedLC) ->
-    {lists:reverse(MungedLC), Vars}.
-
-
-
-
-
-
-
-
-
-
diff --git a/lib/test_server/src/test_server_sup.erl b/lib/test_server/src/test_server_sup.erl
index 53dfb45e3a..ec9be52bd3 100644
--- a/lib/test_server/src/test_server_sup.erl
+++ b/lib/test_server/src/test_server_sup.erl
@@ -51,18 +51,19 @@ timetrap(Timeout0, Scale, Pid) ->
     Timeout = if not Scale -> Timeout0;
 		 true -> test_server:timetrap_scale_factor() * Timeout0
 	      end,
+    TruncTO = trunc(Timeout),
     receive
-    after trunc(Timeout) ->
-	    Line = test_server:get_loc(Pid),
+    after TruncTO ->
+	    MFLs = test_server:get_loc(Pid),
 	    Mon = erlang:monitor(process, Pid),
 	    Trap = 
 		case get(test_server_init_or_end_conf) of
 		    undefined ->
-			{timetrap_timeout,trunc(Timeout),Line};
+			{timetrap_timeout,TruncTO,MFLs};
 		    InitOrEnd ->
-			{timetrap_timeout,trunc(Timeout),Line,InitOrEnd}
+			{timetrap_timeout,TruncTO,MFLs,InitOrEnd}
 		end,
-	    exit(Pid,Trap),
+	    exit(Pid, Trap),
 	    receive
 		{'DOWN', Mon, process, Pid, _} ->
 		    ok
diff --git a/lib/tv/src/tv_main.erl b/lib/tv/src/tv_main.erl
index 2f743c2397..283ba4c967 100644
--- a/lib/tv/src/tv_main.erl
+++ b/lib/tv/src/tv_main.erl
@@ -312,7 +312,7 @@ analyze_error(Cause, Node, Table) ->
             handle_error(mnesia_not_started, Node, Table);
         {badrpc, {'EXIT', {aborted, {node_not_running,_ErrNode}}}} ->
             handle_error(mnesia_not_started, Node, Table);
-	{'EXIT', {undef, {mnesia,_Fcn,_Args}}} ->
+	{'EXIT', {undef, {mnesia,_Fcn,_Args,_}}} ->
 	    handle_error(mnesia_not_started, Node, Table);
 
         {'EXIT', Reason} ->
diff --git a/lib/tv/src/tv_mnesia_rpc.erl b/lib/tv/src/tv_mnesia_rpc.erl
index a2385714ec..4a75994145 100644
--- a/lib/tv/src/tv_mnesia_rpc.erl
+++ b/lib/tv/src/tv_mnesia_rpc.erl
@@ -87,6 +87,8 @@ chk(Result) ->
 	    throw(mnesia_not_started);
 	{badrpc, _Reason} ->
 	    throw(mnesia_not_started);
+	{'EXIT', {undef, {mnesia,_Fcn,_Args,_}}} ->
+	    throw(mnesia_not_started);
 	{'EXIT', {undef, {mnesia,_Fcn,_Args}}} ->
 	    throw(mnesia_not_started);
 	
diff --git a/lib/wx/src/wx_object.erl b/lib/wx/src/wx_object.erl
index bfd38960dd..82c4cfbad5 100644
--- a/lib/wx/src/wx_object.erl
+++ b/lib/wx/src/wx_object.erl
@@ -537,16 +537,16 @@ error_info(_Reason, application_controller, _Msg, _State, _Debug) ->
 error_info(Reason, Name, Msg, State, Debug) ->
     Reason1 = 
 	case Reason of
-	    {undef,[{M,F,A}|MFAs]} ->
+	    {undef,[{M,F,A,L}|MFAs]} ->
 		case code:is_loaded(M) of
 		    false ->
-			{'module could not be loaded',[{M,F,A}|MFAs]};
+			{'module could not be loaded',[{M,F,A,L}|MFAs]};
 		    _ ->
 			case erlang:function_exported(M, F, length(A)) of
 			    true ->
 				Reason;
 			    false ->
-				{'function not exported',[{M,F,A}|MFAs]}
+				{'function not exported',[{M,F,A,L}|MFAs]}
 			end
 		end;
 	    _ ->
diff --git a/lib/xmerl/src/xmerl.erl b/lib/xmerl/src/xmerl.erl
index cf78f7bdf7..2332517988 100644
--- a/lib/xmerl/src/xmerl.erl
+++ b/lib/xmerl/src/xmerl.erl
@@ -307,7 +307,7 @@ apply_cb(Ms, F, Df, Args) ->
 
 apply_cb([M|Ms], F, Df, Args, Ms0) ->
     case catch apply(M, F, Args) of
-	{'EXIT', {undef,[{M,F,_}|_]}} ->
+	{'EXIT', {undef,[{M,F,_,_}|_]}} ->
 	    apply_cb(Ms, F, Df, Args, Ms0);
 	{'EXIT', Reason} ->
 	    exit(Reason);
diff --git a/system/doc/getting_started/seq_prog.xml b/system/doc/getting_started/seq_prog.xml
index bc1758d855..96876ea513 100644
--- a/system/doc/getting_started/seq_prog.xml
+++ b/system/doc/getting_started/seq_prog.xml
@@ -4,7 +4,7 @@
 <chapter>
   <header>
     <copyright>
-      <year>2003</year><year>2009</year>
+      <year>2003</year><year>2011</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -41,9 +41,9 @@
       <c>erl</c>, you will see something like this.</p>
     <pre>
 % <input>erl</input>
-Erlang (BEAM) emulator version 5.2 [source] [hipe]
+Erlang R15B (erts-5.9.1) [source] [smp:8:8] [rq:8] [async-threads:0] [hipe] [kernel-poll:false]
 
-Eshell V5.2  (abort with ^G)
+Eshell V5.9.1  (abort with ^G)
 1></pre>
     <p>Now type in "2 + 5." as shown below.</p>
     <pre>
@@ -245,7 +245,7 @@ convert(N, centimeter) ->
       inch in the convert function:</p>
     <pre>
 12> <input>tut2:convert(3, miles).</input>
-** exception error: no function clause matching tut2:convert(3,miles)</pre>
+** exception error: no function clause matching tut2:convert(3,miles) (tut2.erl, line 4)</pre>
     <p>The two parts of the <c>convert</c> function are called its
       clauses. Here we see that "miles" is not part of either of
       the clauses. The Erlang system can't <em>match</em> either of
@@ -255,11 +255,13 @@ convert(N, centimeter) ->
       command <c>v/1</c>:</p>
     <pre>
 13> <input>v(12).</input>
-{'EXIT',{function_clause,[{tut2,convert,[3,miles]},
-                          {erl_eval,do_apply,5},
-                          {shell,exprs,6},
-                          {shell,eval_exprs,6},
-                          {shell,eval_loop,3}]}}</pre>
+{'EXIT',{function_clause,[{tut2,convert,
+                                [3,miles],
+                                [{file,"tut2.erl"},{line,4}]},
+                          {erl_eval,do_apply,5,[{file,"erl_eval.erl"},{line,482}]},
+                          {shell,exprs,7,[{file,"shell.erl"},{line,666}]},
+                          {shell,eval_exprs,7,[{file,"shell.erl"},{line,621}]},
+                          {shell,eval_loop,3,[{file,"shell.erl"},{line,606}]}]}}</pre>
 
   </section>
 
@@ -943,7 +945,7 @@ A == 1 ; B == 7
 a_equals_1_or_b_equals_7
 66> <input>tut9:test_if(33, 33).</input>
 ** exception error: no true branch found when evaluating an if expression
-     in function  tut9:test_if/2</pre>
+     in function  tut9:test_if/2 (tut9.erl, line 5)</pre>
     <p>Notice that <c>tut9:test_if(33,33)</c> did not cause any
       condition to succeed so we got the run time error
       <c>if_clause</c>, here nicely formatted by the shell. See the chapter