diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/bug621655.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/bug621655.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+/* Don't assert. */
+for(p in 0.3) { }
+
+Number.prototype.foo = function() {}
+var arr = [];
+
+for(p in 1.2) {
+    arr.push(p);
+}
+assertEq(arr[0], "foo");