diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug505305.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug505305.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,5 @@
+// Binary: cache/js-dbg-32-aa85b2f55960-linux
+// Flags:
+//
+var str = 'afoo$40bar'.substr(1);
+print(str.replace(str, str));