JSTests/test262/test/annexB/built-ins/Object/prototype/__lookupSetter__/lookup-proto-get-err.js

// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-additional-properties-of-the-object.prototype-object
description: >
    Behavior when [[GetOwnProperty]] of prototype returns an abrupt completion
info: |
    [...]
    4. Repeat
       a. Let desc be ? O.[[GetOwnProperty]](key).
       b. If desc is not undefined, then
          i. If IsAccessorDescriptor(desc) is true, return desc.[[Set]].
          ii. Return undefined.
       c. Let O be ? O.[[GetPrototypeOf]]().
       d. If O is null, return undefined. 
features: [Proxy]
---*/

var root = Object.defineProperty({}, 'target', { set: function() {} });
var thrower = function() { throw new Test262Error(); };
var intermediary = new Proxy(
  Object.create(root), { getOwnPropertyDescriptor: thrower }
);
var subject = Object.create(intermediary);

assert.throws(Test262Error, function() {
  subject.__lookupSetter__('target');
});