diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug728609.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug728609.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+var lfcode = new Array();
+lfcode.push("\
+test();\
+function test() {\
+  function removeAllProperties(o) {\
+    bar() = thaw, patterns;\
+  }\
+  var o = {};\
+  o.first = { toSource: function() { removeAllProperties(o); } };\
+  return o.toSource();\
+}\
+");
+lfcode.push("test();");
+gczeal(4);
+while (true) {
+        var file = lfcode.shift(); if (file == undefined) { break; }
+                loadFile(file);
+}
+function loadFile(lfVarx) {
+        try {
+                        evaluate(lfVarx);
+        } catch (lfVare) {      }
+}