v8/test/mjsunit/regress/regress-907479.js

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// Copyright 2018 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.
'use strict';
{
const x = [42];
x.splice(0, 0, 23);
assertEquals([23, 42], x);
x.length++;
assertEquals([23, 42, ,], x);
assertFalse(x.hasOwnProperty(2));
}
{
const x = [4.2];
x.splice(0, 0, 23);
assertEquals([23, 4.2], x);
x.length++;
assertEquals([23, 4.2, ,], x);
assertFalse(x.hasOwnProperty(2));
}