diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug487534.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug487534.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,5 @@
+// Binary: cache/js-dbg-32-96746395df4f-linux
+// Flags: -j
+//
+var fs = { x: /a/, y: /a/, z: /a/ };
+for (var p in fs) { this[fs[p]] = null; }