Make sure that eval and try-catch introduced context extension objects...

src/contexts.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 76 matching lines @@
   do {
     if (FLAG_trace_contexts) {
       PrintF(" - looking in context %p", *context);
       if (context->IsGlobalContext()) PrintF(" (global context)");
       PrintF("\n");
     }
 
     // check extension/with object
     if (context->has_extension()) {
       Handle<JSObject> extension = Handle<JSObject>(context->extension());
-      if ((flags & FOLLOW_PROTOTYPE_CHAIN) == 0) {
+      // Context extension objects needs to behave as if they have no
+      // prototype.  So even if we want to follow prototype chains, we
+      // need to only do a local lookup for context extension objects.
+      if ((flags & FOLLOW_PROTOTYPE_CHAIN) == 0 ||
+          extension->IsJSContextExtensionObject()) {
         *attributes = extension->GetLocalPropertyAttribute(*name);
       } else {
         *attributes = extension->GetPropertyAttribute(*name);
       }
       if (*attributes != ABSENT) {
         // property found
         if (FLAG_trace_contexts) {
           PrintF("=> found property in context object %p\n", *extension);
         }
         return extension;
@@ skipping 93 matching lines @@
 
 
 bool Context::IsBootstrappingOrGlobalObject(Object* object) {
   // During bootstrapping we allow all objects to pass as global
   // objects. This is necessary to fix circular dependencies.
   return Bootstrapper::IsActive() || object->IsGlobalObject();
 }
 #endif
 
 } }  // namespace v8::internal