diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/closures/flat-closure-6.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/closures/flat-closure-6.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+actual = '';
+expected = 'bundefined,aundefined,b[object Object],aundefined,bundefined,aundefined,b[object Object],aundefined,bundefined,aundefined,b[object Object],aundefined,bundefined,aundefined,b[object Object],aundefined,bundefined,aundefined,b[object Object],aundefined,bundefined,aundefined,b[object Object],aundefined,bundefined,aundefined,b[object Object],aundefined,bundefined,aundefined,b[object Object],aundefined,bundefined,aundefined,b[object Object],aundefined,bundefined,aundefined,b[object Object],aundefined,';
+
+// tests nfixed case of getting slot with let.
+
+for (var q = 0; q < 10; ++q) {
+  for each(let b in [(void 0), {}]) {
+        appendToActual('a' + ((function() {
+            for (var e in ['']) {
+                appendToActual('b' + b)
+            }
+        })()))
+    }
+}
+
+
+assertEq(actual, expected)