| This test checks that setting a cyclic value for __proto__ throws an exception and does not alter __proto__. This was reported as bug 17927. | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS x.__proto__ = x; threw exception TypeError: cyclic __proto__ value. | |
| PASS x.__proto__ is originalProto | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |