Also in ClearNonLiveTransitions we have to check if there still is a transition array before we acc…

src/objects-inl.h

 // Copyright 2012 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 1979 matching lines @@
   int number = cache->Lookup(this, name);
   if (number == DescriptorLookupCache::kAbsent) {
     number = internal::Search(this, name);
     cache->Update(this, name, number);
   }
   return number;
 }
 
 
 TransitionArray* DescriptorArray::transitions() {
-  if (!this->MayContainTransitions()) return NULL;
+  ASSERT(MayContainTransitions());
   Object* array = get(kTransitionsIndex);
   return TransitionArray::cast(array);
 }
 
 
 void DescriptorArray::ClearTransitions() {
   WRITE_FIELD(this, kTransitionsOffset, Smi::FromInt(0));
 }
 
 
@@ skipping 3269 matching lines @@
 #undef WRITE_UINT32_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_