diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug584565.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug584565.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+// Contributor: Luke Wagner <lw@mozilla.com>
+
+var x, f;
+for (var i = 0; i < 100; i++) {
+    f = function() {};
+    f.foo;
+    x = f.length;
+}