JSTests/ChakraCore/test/es6/bug_OS_2184795.js

//-------------------------------------------------------------------------------------------------------
// Copyright (C) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
//-------------------------------------------------------------------------------------------------------

var x = [,,];
Object.preventExtensions(x);
try { new WeakMap(x); } catch (e) { }
WScript.Echo("passed");