| // Copyright 2016 the V8 project authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style license that can be | |
| // found in the LICENSE file. | |
| var o = {}; | |
| o.__proto__ = new Proxy({}, {}); | |
| var m = new Map(); | |
| m.set({}); | |
| m.set(o); |