// Copyright 2018 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(p) { return p.catch(x => x); } | |
const a = Promise.resolve(1); | |
%PrepareFunctionForOptimization(foo); | |
foo(a); | |
foo(a); | |
%OptimizeFunctionOnNextCall(foo); | |
foo(a); | |
let custom_then_called = false; | |
a.__proto__.then = function() { custom_then_called = true; } | |
foo(a); | |
assertTrue(custom_then_called); |