| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| description: Match failure with non-writable `lastIndex` property |
| es6id: 21.2.5.2 |
| info: | |
| 21.2.5.2 RegExp.prototype.exec ( string ) |
| |
| [...] |
| 6. Return RegExpBuiltinExec(R, S). |
| |
| 21.2.5.2.2 Runtime Semantics: RegExpBuiltinExec ( R, S ) |
| |
| [...] |
| 4. Let lastIndex be ToLength(Get(R,"lastIndex")). |
| [...] |
| 8. Let sticky be ToBoolean(Get(R, "sticky")). |
| [...] |
| 15. Repeat, while matchSucceeded is false |
| [...] |
| b. Let r be matcher(S, lastIndex). |
| c. If r is failure, then |
| i. If sticky is true, then |
| 1. Let setStatus be Set(R, "lastIndex", 0, true). |
| 2. ReturnIfAbrupt(setStatus). |
| ---*/ |
| |
| var r = /c/y; |
| Object.defineProperty(r, 'lastIndex', { |
| writable: false |
| }); |
| |
| assert.throws(TypeError, function() { |
| r.exec('abc'); |
| }); |
