CT: Add source filename in error output when possible

lib/common_test/src/ct_framework.erl

@@ -1013,17 +1013,21 @@ error_notification(Mod,Func,_Args,{Error,Loc}) ->
 	%% if a function specified by all/0 does not exist, we
 	%% pick up undef here
 	[{LastMod,LastFunc}|_] when ErrorStr == "undef" ->
-	    PrintError("~w:~tw could not be executed~nReason: ~ts",
-		     [LastMod,LastFunc,ErrorStr]);
+	    LastSource = error_notification_source_info(LastMod),
+	    PrintError("~w:~tw at ~ts could not be executed~nReason: ~ts",
+		     [LastMod,LastFunc,LastSource,ErrorStr]);
 
 	[{LastMod,LastFunc}|_] ->
-	    PrintError("~w:~tw failed~nReason: ~ts", [LastMod,LastFunc,ErrorStr]);
+	    LastSource = error_notification_source_info(LastMod),
+	    PrintError("~w:~tw at ~ts failed~nReason: ~ts",
+		     [LastMod,LastFunc,LastSource,ErrorStr]);
 
 	[{LastMod,LastFunc,LastLine}|_] ->
 	    %% print error to console, we are only
 	    %% interested in the last executed expression
-	    PrintError("~w:~tw failed on line ~w~nReason: ~ts",
-		     [LastMod,LastFunc,LastLine,ErrorStr]),
+	    LastSource = error_notification_source_info(LastMod),
+	    PrintError("~w:~tw at ~ts:~w failed~nReason: ~ts",
+		     [LastMod,LastFunc,LastSource,LastLine,ErrorStr]),
 
 	    case ct_util:read_suite_data({seq,Mod,Func}) of
 		undefined ->
@@ -1035,6 +1039,16 @@ error_notification(Mod,Func,_Args,{Error,Loc}) ->
     end,
     ok.
 
+error_notification_source_info(Mod) ->
+    maybe
+	{Mod, Beam, _} ?= code:get_object_code(Mod),
+	{ok, {Mod, [{abstract_code, {_, Forms}}]}} ?= beam_lib:chunks(Beam, [abstract_code]),
+	[{attribute, _, file, {File, _}}|_] ?= Forms,
+	File
+    else
+	_ -> atom_to_list(Mod) ++ ".erl"
+    end.
+
 %% cases in seq that have already run
 mark_as_failed(Seq,Mod,Func,[Func|TCs]) ->
     mark_as_failed1(Seq,Mod,Func,TCs);