diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug566637.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug566637.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,5 @@
+for (var j = 0; j < 9; j++) {
+    var a = j;
+    var b = this.a;
+}
+assertEq(b, 8);