diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug568281.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug568281.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+// |jit-test| error:TypeError
+
+// Binary: cache/js-dbg-64-9ca0a738a8ad-linux
+// Flags:
+//
+__defineSetter__("x", Array.reduce)
+x = Proxy.create(function() {},
+this.watch("x",
+function() {
+  yield
+}))