v8/test/mjsunit/regress/regress-crbug-557807.js

// Copyright 2015 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 bar() {
  return {__proto__: this};
}
function foo(a) {
  a[0] = 0.3;
};
%PrepareFunctionForOptimization(foo);
foo(bar());
%OptimizeFunctionOnNextCall(foo);
foo(bar());