// Copyright 2024 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

let u;
let a = [4.2,,];
let e = new Error();

function foo() {
  u = undefined;
  if (a[1] !== u) {
    throw e;
  }
}

%PrepareFunctionForOptimization(foo);
foo();
foo();
%OptimizeFunctionOnNextCall(foo);
foo();