Make Failure inherit from MaybeObject instead of Object.

src/messages.cc

 
 // Copyright 2006-2008 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
@@ skipping 134 matching lines @@
       Handle<Object> callback_data(listener.get(1));
       callback(api_message_obj, v8::Utils::ToLocal(callback_data));
     }
   }
 }
 
 
 Handle<String> MessageHandler::GetMessage(Handle<Object> data) {
   Handle<String> fmt_str = Factory::LookupAsciiSymbol("FormatMessage");
   Handle<JSFunction> fun =
-      Handle<JSFunction>(
-          JSFunction::cast(Top::builtins()->GetProperty(*fmt_str)));
+      Handle<JSFunction>(JSFunction::cast(
+          Top::builtins()->GetPropertyNoExceptionThrown(*fmt_str)));
   Object** argv[1] = { data.location() };
 
   bool caught_exception;
   Handle<Object> result =
       Execution::TryCall(fun, Top::builtins(), 1, argv, &caught_exception);
 
   if (caught_exception || !result->IsString()) {
     return Factory::LookupAsciiSymbol("<error>");
   }
   Handle<String> result_string = Handle<String>::cast(result);
   // A string that has been obtained from JS code in this way is
   // likely to be a complicated ConsString of some sort.  We flatten it
   // here to improve the efficiency of converting it to a C string and
   // other operations that are likely to take place (see GetLocalizedMessage
   // for example).
   FlattenString(result_string);
   return result_string;
 }
 
 
 SmartPointer<char> MessageHandler::GetLocalizedMessage(Handle<Object> data) {
   HandleScope scope;
   return GetMessage(data)->ToCString(DISALLOW_NULLS);
 }
 
 
 } }  // namespace v8::internal