emulator: Add a fourth element in exception stacktraces

This commit is a preparation for introducing location information
(filename/line number) in stacktraces in exceptions. Currently
a stack trace looks like:

  [{Mod1,Function1,Arity1},
   .
   .
   .
   {ModN,FunctionN,ArityN}]

Add a forth element to each tuple that can be used indication
the filename and line number of the source file:

  [{Mod1,Function1,Arity1,Location1},
   .
   .
   .
   {ModN,FunctionN,ArityN,LocationN}]

In this commit, the fourth element will just be an empty list,
and we will change all code that look at or manipulate stacktraces.

1 files changed, 2 insertions, 2 deletions

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),