| // 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. |
| |
| // lastIndex is set according to funny rules. It is typically set only |
| // for global or sticky RegExps, but on a failure to find a match, it is |
| // set unconditionally. If a set fails, then it acts as if in strict mode |
| // and throws. |
| |
| var re = /x/; |
| Object.defineProperty(re, 'lastIndex', {writable: false}); |
| assertThrows(() => re.exec(""), TypeError); |
| assertEquals(["x"], re.exec("x")); |
| |
| var re = /x/y; |
| Object.defineProperty(re, 'lastIndex', {writable: false}); |
| assertThrows(() => re.exec(""), TypeError); |
| assertThrows(() => re.exec("x"), TypeError); |
