diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug568275.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug568275.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+// Binary: cache/js-dbg-32-9ca0a738a8ad-linux
+// Flags:
+//
+x = ({
+    x: /x/
+})
+x.p = []
+Object.defineProperty(x, "x", {
+    writable: ""
+})
+for (b in [[], null, [undefined]]) {
+    function f(a) {
+        delete a.x
+        a.x = Infinity
+    }
+    for each(z in [x]) {
+        f(z)
+    }
+}