| // 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. |
| |
| // Flags: --allow-natives-syntax |
| |
| function foo() {} |
| foo.__defineGetter__(undefined, function() {}); |
| |
| function bar() {} |
| function baz(x) { |
| return x instanceof bar; |
| }; |
| %PrepareFunctionForOptimization(baz); |
| ; |
| %OptimizeFunctionOnNextCall(baz); |
| baz(); |
| Object.setPrototypeOf(bar, null); |
| bar[Symbol.hasInstance] = function() { |
| return true; |
| }; |
| assertTrue(baz()); |
