diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_5/regress/regress-569306.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_5/regress/regress-569306.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+function f() {}
+var g = new Function();
+delete Function;
+function h() {}
+
+assertEq(f.__proto__, g.__proto__);
+assertEq(g.__proto__, h.__proto__);
+assertEq(false, "Function" in this);
+
+reportCompare("ok", "ok", "bug 569306");