src/third_party/v8/test/mjsunit/regress/regress-5669.js

// Copyright 2017 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.

function f(a, i, v) { a[i] = v; }
f("make it generic", 0, 0);

var a = new Array();
Object.defineProperty(a, "length", {value: 3, writable: false});
print(JSON.stringify(Object.getOwnPropertyDescriptor(a, "length")));
assertEquals(3, a.length);
f(a, 3, 3);
assertFalse(Object.getOwnPropertyDescriptor(a, "length").writable);
assertEquals(3, a.length);

var b = new Array();
b.length = 3;
Object.freeze(b);
assertEquals(3, b.length);
f(b, 3, 3);
assertEquals(3, b.length);