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| 1 // Copyright 2017 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 // Flags: --allow-natives-syntax |
| 6 |
| 7 class A extends Object { |
| 8 constructor(arg) { |
| 9 super(); |
| 10 superclass_counter++; |
| 11 if (superclass_counter === 3) { |
| 12 return 1; |
| 13 } |
| 14 } |
| 15 } |
| 16 |
| 17 class B extends A { |
| 18 constructor() { |
| 19 let x = super(123); |
| 20 return x.a; |
| 21 } |
| 22 } |
| 23 |
| 24 var superclass_counter = 0; |
| 25 var observer = new Proxy(A, { |
| 26 get(target, property, receiver) { |
| 27 if (property === 'prototype') { |
| 28 %DeoptimizeFunction(B); |
| 29 } |
| 30 return Reflect.get(target, property, receiver); |
| 31 } |
| 32 }); |
| 33 |
| 34 Reflect.construct(B, [], observer); |
| 35 Reflect.construct(B, [], observer); |
| 36 %OptimizeFunctionOnNextCall(B); |
| 37 assertThrows(() => Reflect.construct(B, [], observer), TypeError); |
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