diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/try-catch-6.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/try-catch-6.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+var o = {
+    valueOf: function() {}
+};
+var threw = false;
+function test(t) {
+    try {
+        for (x[t++] in o) {}
+    } catch (err) {
+	assertEq(t, 3.14);
+	threw = true;
+    }
+}
+test(3.14);
+assertEq(threw, true);