diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug827659-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug827659-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+function f(x) {
+    return x["__proto__"]
+}
+var res = 0;
+for each(a in [{}, null]) {
+    try {
+        f(a);
+	res += 20;
+    } catch (e) {
+	assertEq(e instanceof TypeError, true);
+	assertEq(e.message.indexOf("is null") > 0, true);
+	res += 50;
+    }
+}
+assertEq(res, 70);