regress-946889.js 415 Bytes
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// 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;
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};
%PrepareFunctionForOptimization(foo);
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foo();
foo();
%OptimizeFunctionOnNextCall(foo);
foo();