Fall back to generic on access checks in JSON.stringify.

src/json-stringifier.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 416 matching lines @@
           AppendAscii("true");
           return SUCCESS;
         case Oddball::kNull:
           if (deferred_string_key) SerializeDeferredKey(comma, key);
           AppendAscii("null");
           return SUCCESS;
         default:
           return UNCHANGED;
       }
     case JS_ARRAY_TYPE:
+      if (object->IsAccessCheckNeeded()) break;
       if (deferred_string_key) SerializeDeferredKey(comma, key);
       return SerializeJSArray(Handle<JSArray>::cast(object));
     case JS_VALUE_TYPE:
       if (deferred_string_key) SerializeDeferredKey(comma, key);
       return SerializeJSValue(Handle<JSValue>::cast(object));
     case JS_FUNCTION_TYPE:
       return UNCHANGED;
     default:
       if (object->IsString()) {
         if (deferred_string_key) SerializeDeferredKey(comma, key);
         SerializeString(Handle<String>::cast(object));
         return SUCCESS;
       } else if (object->IsJSObject()) {
+        if (object->IsAccessCheckNeeded()) break;
         if (deferred_string_key) SerializeDeferredKey(comma, key);
         return SerializeJSObject(Handle<JSObject>::cast(object));
-      } else {
-        return SerializeGeneric(object, key, comma, deferred_string_key);
       }
   }
+
+  return SerializeGeneric(object, key, comma, deferred_string_key);
 }
 
 
 BasicJsonStringifier::Result BasicJsonStringifier::SerializeGeneric(
     Handle<Object> object,
     Handle<Object> key,
     bool deferred_comma,
     bool deferred_key) {
   Handle<JSObject> builtins(isolate_->native_context()->builtins());
   Handle<JSFunction> builtin =
@@ skipping 374 matching lines @@
       SerializeString_<false, uint8_t>(object);
     } else {
       SerializeString_<false, uc16>(object);
     }
   }
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSON_STRINGIFIER_H_