// Copyright 2019 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 Object.preventExtensions(Array.prototype); function foo() { var arr = []; [...arr, 42, null]; arr.length = 1; }; %PrepareFunctionForOptimization(foo); foo(); foo(); %OptimizeFunctionOnNextCall(foo); foo();