diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug824856.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug824856.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+// |jit-test| error: TypeError
+RegExp("(&)??\\1}").test("&D")
+"xy".match(/((x)??){2}y/)
+"\u66d6J".split(/((\u66d6)??){7}J/)
+"2\"".match("(((2)??)+\")")()
+