diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug643169.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug643169.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+for(var i=0; i<3; i++) {
+    var x;
+    function ff() {}
+    with(this) {}
+    x;
+    x = true;
+}