node/deps/v8/test/mjsunit/regress/regress-4962.js

// Copyright 2016 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.

if (this.Intl) {
  assertInstanceof(Intl.NumberFormat.call(new Proxy({},{})), Intl.NumberFormat);
  assertThrows(() =>
               Intl.DateTimeFormat.prototype.formatToParts.call(
                   new Proxy({}, {})),
               TypeError);
}