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

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// 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; }
foo(bar());
%OptimizeFunctionOnNextCall(foo);
foo(bar());