diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testStaticsInRegExp.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testStaticsInRegExp.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+'abcdef'.replace(/a(\w+)c/, function() {
+    assertEq(RegExp.lastMatch, 'abc');
+    '123456'.replace(/1(\d+)3/, function() {
+        assertEq(RegExp.lastMatch, '123');
+    });
+    assertEq(RegExp.lastMatch, '123');
+});
+assertEq(RegExp.lastMatch, 'abc');
+