diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug486139.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug486139.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,4 @@
+// Binary: cache/js-dbg-64-023cb4350567-linux
+// Flags:
+//
+uneval((function(){([z] = []).y >>= x}));