diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/bug583684.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/bug583684.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+// |jit-test| error: TypeError
+(function () {
+    var b = e
+    for (var [e] = b in w) c
+})()
+
+/* Don't assert. */
+