diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug487320.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug487320.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+// Binary: cache/js-dbg-64-57213af4a45d-linux
+// Flags:
+//
+function outer(x) {
+    return (function foo() {
+                this.bar = foo;
+                return x;
+            })();
+}
+print(outer(42));
+print(bar());           // BOOM!