Fix the source position recorded for funtion return

src/codegen.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 550 matching lines @@
     if (pos != RelocInfo::kNoPosition) {
       masm()->RecordStatementPosition(pos);
       masm()->RecordPosition(pos);
     }
   }
 }
 
 
 void CodeGenerator::CodeForReturnPosition(FunctionLiteral* fun) {
   if (FLAG_debug_info) {
-    int pos = fun->start_position();
+    int pos = fun->end_position();
     if (pos != RelocInfo::kNoPosition) {
       masm()->RecordStatementPosition(pos);
       masm()->RecordPosition(pos);
     }
   }
 }
 
 
 void CodeGenerator::CodeForStatementPosition(Node* node) {
   if (FLAG_debug_info) {
@@ skipping 28 matching lines @@
 void ArgumentsAccessStub::Generate(MacroAssembler* masm) {
   switch (type_) {
     case READ_LENGTH: GenerateReadLength(masm); break;
     case READ_ELEMENT: GenerateReadElement(masm); break;
     case NEW_OBJECT: GenerateNewObject(masm); break;
   }
 }
 
 
 } }  // namespace v8::internal