Merge branch 'bjorn/asn1/cleanup/OTP-11727'

* bjorn/asn1/cleanup/OTP-11727:
  asn1ct_check: Use a return value to silence a dialyzer warning
  asn1ct_check: Remove useless call to check_integer/3
  asn1ct_check: Correct error handling for illegal OCTET STRING values
  asn1ct: Silence dialyzer warnings for unmatched returns
  asn1ct_table: Remove unused flexibility in table creation
  asn1ct_table: Silence a dialyzer warning for unmatched return
  asn1ct_gen: Silence dialyzer warnings for unmatched returns
  asn1ct_value: Silence a dialyzer warning for unmatched return
  asn1ct_tok: Check return value from file:close/1

6 files changed, 35 insertions, 49 deletions

diff --git a/lib/asn1/src/asn1ct.erl b/lib/asn1/src/asn1ct.erl
index 531a4935fe..30f493a2df 100644
--- a/lib/asn1/src/asn1ct.erl
+++ b/lib/asn1/src/asn1ct.erl
@@ -1040,7 +1040,7 @@ get_file_list1(Stream,Dir,Includes,Acc) ->
     Ret = io:get_line(Stream,''),
     case Ret of
 	eof ->
-	    file:close(Stream),
+	    ok = file:close(Stream),
 	    lists:reverse(Acc);
 	FileName ->
 	    SuffixedNameList =
@@ -1926,8 +1926,9 @@ read_config_file(ModuleName) ->
 	    Includes = [I || {i,I} <- Options],
 	    read_config_file1(ModuleName,Includes);
 	{error,Reason} ->
-	    file:format_error(Reason),
-	    throw({error,{"error reading asn1 config file",Reason}})
+	    Error = "error reading asn1 config file: " ++
+		file:format_error(Reason),
+	    throw({error,Error})
     end.
 read_config_file1(ModuleName,[]) ->
     case filename:extension(ModuleName) of
@@ -1945,8 +1946,9 @@ read_config_file1(ModuleName,[H|T]) ->
 	{error,enoent} ->
 	    read_config_file1(ModuleName,T);
 	{error,Reason} ->
-	    file:format_error(Reason),
-	    throw({error,{"error reading asn1 config file",Reason}})
+	    Error = "error reading asn1 config file: " ++
+		file:format_error(Reason),
+	    throw({error,Error})
     end.
     
 get_config_info(CfgList,InfoType) ->
diff --git a/lib/asn1/src/asn1ct_check.erl b/lib/asn1/src/asn1ct_check.erl
index df034c96ad..b9f2cb876a 100644
--- a/lib/asn1/src/asn1ct_check.erl
+++ b/lib/asn1/src/asn1ct_check.erl
@@ -2464,7 +2464,7 @@ normalize_value(S0, Type, {'DEFAULT',Value}, NameList) ->
 	{'BIT STRING',CType,_} ->
 	    normalize_bitstring(S,Value,CType);
 	{'OCTET STRING',CType,_} ->
-	    normalize_octetstring(S,Value,CType);
+	    normalize_octetstring(S0, Value, CType);
 	{'NULL',_CType,_} ->
 	    %%normalize_null(Value);
 	    'NULL';
@@ -2612,20 +2612,9 @@ normalize_octetstring(S,Value,CType) ->
 				 fun normalize_octetstring/3,[]);
 	{Name,String} when is_atom(Name) ->
 	    normalize_octetstring(S,String,CType);
-	List when is_list(List) ->
-	    %% check if list elements are valid octet values
-	    lists:map(fun([])-> ok;
-			 (H)when H > 255->
-			      asn1ct:warning("not legal octet value ~p in OCTET STRING, ~p~n",
-					     [H,List],S,
-					     "not legal octet value ~p in OCTET STRING");
-			 (_)-> ok
-		      end, List),
-	    List;
-	Other ->
-	    asn1ct:warning("unknown default value ~p~n",[Other],S,
-			   "unknown default value"),
-	    Value
+	_ ->
+	    Item = S#state.value,
+	    throw(asn1_error(S, Item, illegal_octet_string_value))
     end.
 
 normalize_objectidentifier(S, Value) ->
@@ -3091,7 +3080,6 @@ check_type(S=#state{recordtopname=TopName},Type,Ts) when is_record(Ts,type) ->
 		Ct=maybe_illicit_implicit_tag(open_type,Tag),
 		TempNewDef#newt{type='ASN1_OPEN_TYPE',tag=Ct};
 	    'INTEGER' ->
-		check_integer(S,[],Constr),
 		TempNewDef#newt{tag=
 				merge_tags(Tag,?TAG_PRIMITIVE(?N_INTEGER))};
 
@@ -3938,9 +3926,9 @@ check_constraint(S,{simpletable,Type}) ->
 	#'Externaltypereference'{} ->
 	    ERef = check_externaltypereference(S,C),
 	    {simpletable,ERef#'Externaltypereference'.type};
-	#type{def=#'Externaltypereference'{type=T}} ->
-	    check_externaltypereference(S,C#type.def),
-	    {simpletable,T};
+	#type{def=#'Externaltypereference'{}=ExtTypeRef} ->
+	    ERef = check_externaltypereference(S, ExtTypeRef),
+	    {simpletable,ERef#'Externaltypereference'.type};
 	{valueset,#type{def=ERef=#'Externaltypereference'{}}} -> % this is an object set
 	    {_,TDef} = get_referenced_type(S,ERef),
 	    case TDef#typedef.typespec of 
@@ -6814,6 +6802,8 @@ asn1_error(#state{mname=Where}, Item, Error) ->
 format_error({already_defined,Name,PrevLine}) ->
     io_lib:format("the name ~p has already been defined at line ~p",
 		  [Name,PrevLine]);
+format_error(illegal_octet_string_value) ->
+    "expecting a bstring or an hstring as value for an OCTET STRING";
 format_error({invalid_fields,Fields,Obj}) ->
     io_lib:format("invalid ~s in ~p", [format_fields(Fields),Obj]);
 format_error({missing_mandatory_fields,Fields,Obj}) ->
diff --git a/lib/asn1/src/asn1ct_gen.erl b/lib/asn1/src/asn1ct_gen.erl
index 71d870b4ce..4707e517b4 100644
--- a/lib/asn1/src/asn1ct_gen.erl
+++ b/lib/asn1/src/asn1ct_gen.erl
@@ -71,7 +71,7 @@ pgen_module(OutFile,Erules,Module,
     HrlGenerated = pgen_hrl(Erules,Module,TypeOrVal,Options,Indent),
     asn1ct_name:start(),
     ErlFile = lists:concat([OutFile,".erl"]),
-    open_output_file(ErlFile),
+    _ = open_output_file(ErlFile),
     asn1ct_func:start_link(),
     gen_head(Erules,Module,HrlGenerated),
     pgen_exports(Erules,Module,TypeOrVal),
@@ -190,7 +190,7 @@ pgen_check_defaultval(Erules,Module) ->
 				  "********~n~n",[X]) 
 		end,
 	    lists:foreach(Fun,CheckObjects),
-	    file:close(IoDevice);
+	    ok = file:close(IoDevice);
 	_ -> ok
     end,
     gen_check_defaultval(Erules,Module,CheckObjects).
@@ -1124,7 +1124,7 @@ pgen_info() ->
 
 open_hrl(OutFile,Module) ->
     File = lists:concat([OutFile,".hrl"]),
-    open_output_file(File),
+    _ = open_output_file(File),
     gen_hrlhead(Module).
 
 %% EMIT functions ************************
diff --git a/lib/asn1/src/asn1ct_table.erl b/lib/asn1/src/asn1ct_table.erl
index a5eb6d0413..2eca80eda3 100644
--- a/lib/asn1/src/asn1ct_table.erl
+++ b/lib/asn1/src/asn1ct_table.erl
@@ -22,34 +22,25 @@
 %% Table abstraction module for ASN.1 compiler
 
 -export([new/1]).
--export([new/2]).
 -export([new_reuse/1]).
--export([new_reuse/2]).
 -export([exists/1]).
 -export([size/1]).
 -export([insert/2]).
 -export([lookup/2]).
 -export([match/2]).
 -export([to_list/1]).
--export([delete/1]). % TODO: Remove (since we run in a separate process)
+-export([delete/1]).
 
 
-%% Always creates a new table
-new(Table) -> new(Table, []).
-new(Table, Options) ->
-    TableId = case get(Table) of
-                undefined ->
-                    ets:new(Table, Options);
-                _  ->
-                    delete(Table),
-                    ets:new(Table, Options)
-              end,
+%% Always create a new table.
+new(Table) ->
+    undefined = get(Table),			%Assertion.
+    TableId = ets:new(Table, []),
     put(Table, TableId).
 
-%% Only create it if it doesn't exist yet
-new_reuse(Table) -> new_reuse(Table, []).
-new_reuse(Table, Options) ->
-    not exists(Table) andalso new(Table, Options).
+%% Only create it if it doesn't exist yet.
+new_reuse(Table) ->
+    not exists(Table) andalso new(Table).
 
 exists(Table) -> get(Table) =/= undefined.
 
@@ -63,14 +54,17 @@ match(Table, MatchSpec) -> ets:match(get(Table), MatchSpec).
 
 to_list(Table) -> ets:tab2list(get(Table)).
 
+%% Deleting tables is no longer strictly necessary since each compilation
+%% runs in separate process, but it will reduce memory consumption
+%% especially when many compilations are run in parallel.
+
 delete(Tables) when is_list(Tables) ->
     [delete(T) || T <- Tables],
     true;
 delete(Table) when is_atom(Table) ->
-    case get(Table) of
+    case erase(Table) of
         undefined ->
             true;
         TableId ->
-            ets:delete(TableId),
-            erase(Table)
+            ets:delete(TableId)
     end.
diff --git a/lib/asn1/src/asn1ct_tok.erl b/lib/asn1/src/asn1ct_tok.erl
index 85199c65ec..33f4379173 100644
--- a/lib/asn1/src/asn1ct_tok.erl
+++ b/lib/asn1/src/asn1ct_tok.erl
@@ -36,7 +36,7 @@ process(Stream,Lno,R) ->
     process(io:get_line(Stream, ''), Stream,Lno+1,R).
 
 process(eof, Stream,Lno,R) ->
-    file:close(Stream),
+    ok = file:close(Stream),
     lists:flatten(lists:reverse([{'$end',Lno}|R]));
 
 
diff --git a/lib/asn1/src/asn1ct_value.erl b/lib/asn1/src/asn1ct_value.erl
index a86c963b9d..be8b967cf0 100644
--- a/lib/asn1/src/asn1ct_value.erl
+++ b/lib/asn1/src/asn1ct_value.erl
@@ -352,7 +352,7 @@ random_unnamed_bit_string(M, C) ->
 
 random(Upper) ->
     {A1,A2,A3} = erlang:now(),
-    random:seed(A1,A2,A3),
+    _ = random:seed(A1, A2, A3),
     random:uniform(Upper).
 
 size_random(C) ->