diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug609502-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug609502-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+for(var i = 0; i < 9; i++) {
+      x = ''.charCodeAt(NaN);
+}
+
+for(var i = 0; i < 9; i++) {
+      x = ''.charAt(NaN);
+}
+
+// Don't assert