diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/proxy/bug911553.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/proxy/bug911553.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+assertEq(
+    ""+new Proxy(
+        {toString:() => "inner toString"},
+        {get:(t, pk) => (pk === "toString" ? () => "proxy toString" : t[pk])}),
+    "proxy toString")
+assertEq(
+    ""+new Proxy(
+        {valueOf:() => "inner valueOf"},
+        {get:(t, pk) => (pk === "valueOf" ? () => "proxy valueOf" : t[pk])}),
+    "proxy valueOf")