diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug724530.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug724530.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+function fannkuch() {
+    var perm = [];
+    var k = undefined;
+    for (var j = 0; j < 50; j++) {
+        for (var i = 0; i < 0; i++) {
+            perm[k - 1] = 0;
+        }
+    }
+}
+fannkuch();