1 // Copyright 2015 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 function Bar() { } 6 function Baz() { } 7 Baz.prototype = { __proto__: new Bar() } 8 var x = new Baz(); 9 function foo(y) { return y instanceof Bar; } 10 assertTrue(foo(x)); 11 Baz.prototype.__proto__ = null; 12 assertFalse(foo(x)); 13
