1 files changed, 54 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/prototype/Symbol.match/builtin-success-g-set-lastindex-err.js b/js/src/tests/test262/built-ins/RegExp/prototype/Symbol.match/builtin-success-g-set-lastindex-err.js
new file mode 100644
index 0000000000..69a5517173
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/prototype/Symbol.match/builtin-success-g-set-lastindex-err.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: >
+    Behavior when error thrown while setting `lastIndex` after a "global" match
+    success
+es6id: 21.2.5.6
+info: |
+    [...]
+    5. Let global be ToBoolean(Get(rx, "global")).
+    6. ReturnIfAbrupt(global).
+    7. If global is false, then
+       a. Return RegExpExec(rx, S).
+
+    21.2.5.2.1 Runtime Semantics: RegExpExec ( R, S )
+
+    [...]
+    7. Return RegExpBuiltinExec(R, S).
+
+    21.2.5.2.2 Runtime Semantics: RegExpBuiltinExec ( R, S )
+
+    [...]
+    18. If global is true or sticky is true,
+        a. Let setStatus be Set(R, "lastIndex", e, true).
+        b. ReturnIfAbrupt(setStatus).
+features: [Symbol.match]
+---*/
+
+var r = /b/g;
+var callCount = 0;
+
+// Because this test speicifically concerns the behavior when setting
+// "lastIndex" following a match, care must be taken to avoid triggering a
+// similar error when `lastIndex` is initially set to `0` earlier in the
+// algorithm.
+//
+// Because the `lastIndex` property is non-configurable, this cannot be
+// accomplished with a simple "set" accessor function.
+//
+// Defer disabling modification of `lastIndex` until after the "this" value's
+// `exec` property has been accessed, ensuring that the resultant abrupt
+// completion originates  from the second property modification.
+Object.defineProperty(r, 'exec', {
+  get: function() {
+    Object.defineProperty(r, 'lastIndex', { writable: false });
+  }
+});
+
+assert.throws(TypeError, function() {
+  r[Symbol.match]('abc');
+});
+
+reportCompare(0, 0);