diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug648739.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug648739.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+// |jit-test| error:TypeError
+
+// Binary: cache/js-dbg-64-6c8becdd1574-linux
+// Flags:
+//
+(function () {
+    [] = x = /x/;
+    x.toString = Function.prototype.bind;
+    print(x)
+})()