Zap prototype transitions in release mode, too.

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 5350 matching lines @@
     return GetHeap()->empty_fixed_array();
   }
   return transitions()->GetPrototypeTransitions();
 }
 
 
 void Map::SetPrototypeTransitions(
     Handle<Map> map, Handle<FixedArray> proto_transitions) {
   EnsureHasTransitionArray(map);
   int old_number_of_transitions = map->NumberOfProtoTransitions();
-#ifdef DEBUG
-  if (map->HasPrototypeTransitions()) {
+  if (Heap::ShouldZapGarbage() && map->HasPrototypeTransitions()) {
     DCHECK(map->GetPrototypeTransitions() != *proto_transitions);
     map->ZapPrototypeTransitions();
   }
-#endif
   map->transitions()->SetPrototypeTransitions(*proto_transitions);
   map->SetNumberOfProtoTransitions(old_number_of_transitions);
 }
 
 
 bool Map::HasPrototypeTransitions() {
   return HasTransitionArray() && transitions()->HasPrototypeTransitions();
 }
 
 
@@ skipping 2090 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_