1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/prototype/exec/y-init-lastindex.js b/js/src/tests/test262/built-ins/RegExp/prototype/exec/y-init-lastindex.js
new file mode 100644
index 0000000000..ca5b7ea03b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/prototype/exec/y-init-lastindex.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Honors initial value of the `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")).
+    9. ReturnIfAbrupt(sticky).
+    10. If global is false and sticky is false, let lastIndex be 0.
+---*/
+
+var r = /./y;
+var match;
+r.lastIndex = 1;
+
+match = r.exec('abc');
+
+assert(match !== null);
+assert.sameValue(match.length, 1);
+assert.sameValue(match[0], 'b');
+
+reportCompare(0, 0);