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
  ...

1 files changed, 7 insertions, 2 deletions

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)).