diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/proxy/testDirectProxySet2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/proxy/testDirectProxySet2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+/*
+ * Call the trap with the handler as the this value, the target as the first
+ * argument, the name of the property as the second argument, the value as the
+ * third argument, and the receiver as the fourth argument
+ */
+var target = {};
+var called = false;
+var handler = {
+    set: function (target1, name, val, receiver) {
+        assertEq(this, handler);
+        assertEq(target1, target);
+        assertEq(name, 'foo');
+        assertEq(val, 'baz');
+        assertEq(receiver, proxy);
+        called = true;
+    }
+};
+var proxy = new Proxy(target, handler);
+proxy['foo'] = 'baz';
+assertEq(called, true);