| Index: src/builtins.cc | 
| diff --git a/src/builtins.cc b/src/builtins.cc | 
| index e404b5107c78b1860ef7cdea308443ea61206dee..279594e0fe84fa7d13d4d6399382eb24115dcbec 100644 | 
| --- a/src/builtins.cc | 
| +++ b/src/builtins.cc | 
| @@ -1222,7 +1222,7 @@ static inline Object* FindHidden(Heap* heap, | 
| Object* object, | 
| FunctionTemplateInfo* type) { | 
| if (object->IsInstanceOf(type)) return object; | 
| -  Object* proto = object->GetPrototype(); | 
| +  Object* proto = object->GetPrototype(heap->isolate()); | 
| if (proto->IsJSObject() && | 
| JSObject::cast(proto)->map()->is_hidden_prototype()) { | 
| return FindHidden(heap, proto, type); | 
|  |