diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug709633.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug709633.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+test();
+function test() {
+  var f;
+  f = function() { (let(x) {y: z}) }
+    let (f = function() {
+        for (var t=0;t<6;++t) ++f;
+    }) { f(); } //  {  }       
+  actual = f + '';
+}