diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/closures/t020.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/closures/t020.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+actual = '';
+expected = '0,0,1,1,2,2,3,3,';
+
+let(f = function() {
+    for (let x = 0; x < 4; ++x) {
+      (function() {
+	for (let y = 0; y < 2; ++y) {
+	  appendToActual(x);
+	}
+      })()
+	}
+}) { 
+    f(0)
+}
+
+
+assertEq(actual, expected)