v8/test/mjsunit/regress/regress-crbug-724608.js

// Copyright 2017 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(x) {
  return {['p']: 0, x};
};
%PrepareFunctionForOptimization(foo);
foo();
var a = {['p']: ''};
%OptimizeFunctionOnNextCall(foo);
foo();