| // 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: --harmony-intl-add-calendar-numbering-system | |
| var v = {}; | |
| Object.defineProperty(v.__proto__, "calendar", | |
| { get: function() { return -1; } }); | |
| assertThrows(() => new Intl.DateTimeFormat(v, 0), RangeError); |