Fixing propertyIsEnumerable for properties that are *both* enumerable and rea...

src/runtime.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
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1916 matching lines @@
 
   CONVERT_CHECKED(JSObject, object, args[0]);
   CONVERT_CHECKED(String, key, args[1]);
 
   uint32_t index;
   if (key->AsArrayIndex(&index)) {
     return Heap::ToBoolean(object->HasElement(index));
   }
 
   PropertyAttributes att = object->GetLocalPropertyAttribute(key);
-  return Heap::ToBoolean(att != ABSENT && att != DONT_ENUM);
+  return Heap::ToBoolean(att != ABSENT && (att & DONT_ENUM) == 0);
 }
 
 
 static Object* Runtime_GetPropertyNames(Arguments args) {
   HandleScope scope;
   ASSERT(args.length() == 1);
 
   CONVERT_CHECKED(JSObject, raw_object, args[0]);
   Handle<JSObject> object(raw_object);
   return *GetKeysFor(object);
@@ skipping 3855 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     Counters::gc_last_resort_from_js.Increment();
     Heap::CollectAllGarbage();
   }
 }
 
 
 } }  // namespace v8::internal