diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug683470.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug683470.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+// |jit-test| debug
+
+f = (function() {
+    function b() {
+        "use strict";
+        Object.defineProperty(this, "x", ({}));
+    }
+    for each(let d in [0, 0]) {
+        try {
+            b(d);
+        } catch (e) {}
+    }
+})
+trap(f, 40, undefined);
+f();