diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug578015.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug578015.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+// Binary: cache/js-dbg-64-60c111fc0d4b-linux
+// Flags:
+//
+(function () {
+    x = Proxy.createFunction((function () {
+        return {
+            getOwnPropertyDescriptor: function () {
+                return this
+            },
+            get: undefined
+        }
+    })(), Object.getOwnPropertyDescriptor)
+})()
+x(x)