diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug720169.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug720169.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+function foo() {
+  var x = 0;
+  var y = 0;
+  while (x++ < 100)
+    y++;
+  assertEq(y, 100);
+}
+foo();