Fix issue 186:...

src/objects.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 922 matching lines @@
         break;
     }
     return;
   }
 
   switch (type) {
     case FIXED_ARRAY_TYPE:
       reinterpret_cast<FixedArray*>(this)->FixedArrayIterateBody(v);
       break;
     case JS_OBJECT_TYPE:
+    case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
     case JS_VALUE_TYPE:
     case JS_ARRAY_TYPE:
     case JS_REGEXP_TYPE:
     case JS_FUNCTION_TYPE:
     case JS_GLOBAL_PROXY_TYPE:
     case JS_GLOBAL_OBJECT_TYPE:
     case JS_BUILTINS_OBJECT_TYPE:
       reinterpret_cast<JSObject*>(this)->JSObjectIterateBody(object_size, v);
       break;
     case ODDBALL_TYPE:
@@ skipping 1400 matching lines @@
     return JSObject::cast(proto)->LocalLookup(name, result);
   }
 
   // Do not use inline caching if the object is a non-global object
   // that requires access checks.
   if (!IsJSGlobalProxy() && IsAccessCheckNeeded()) {
     result->DisallowCaching();
   }
 
   // Check __proto__ before interceptor.
-  if (name->Equals(Heap::Proto_symbol())) {
+  if (name->Equals(Heap::Proto_symbol()) && !IsJSContextExtensionObject()) {
     result->ConstantResult(this);
     return;
   }
 
   // Check for lookup interceptor except when bootstrapping.
   if (HasNamedInterceptor() && !Bootstrapper::IsActive()) {
     result->InterceptorResult(this);
     return;
   }
 
@@ skipping 4640 matching lines @@
   // No break point.
   if (break_point_objects()->IsUndefined()) return 0;
   // Single beak point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 
 
 } }  // namespace v8::internal