v8/test/mjsunit/compiler/regress-890057.js

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// 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 f() {}
function g() {
f.prototype = undefined;
f();
new f();
}
// Do not use %OptimizeFunctionOnNextCall here, this particular bug needs
// to trigger truly concurrent compilation.
for (let i = 0; i < 10000; i++) g();