// Copyright 2016 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) { var a = new Array(1); a[0] = x; return a; }; %PrepareFunctionForOptimization(foo); assertEquals([1], foo(1)); assertEquals([1], foo(1)); %OptimizeFunctionOnNextCall(foo); assertEquals([1], foo(1)); Array.prototype.__defineSetter__('0', function() {}); assertEquals([undefined], foo(1));