// 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.

// Flags: --allow-natives-syntax

var longString = (function() {
  return "a".repeat(%StringMaxLength());
})();

assertThrows(() => { return { get[longString]() { } } }, RangeError);
assertThrows(() => { return { set[longString](v) { } } }, RangeError);
assertThrows(() => { return { [Symbol(longString)]: () => {} } }, RangeError);
