diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/proxy/testDirectProxyConstruct1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/proxy/testDirectProxyConstruct1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+// Forward to the target if the trap is undefined
+var target = function (x, y) {
+    this.foo = x + y;
+}
+var obj = new (Proxy(target, {}))(2, 3);
+assertEq(obj.foo, 5);
+assertEq(Object.getPrototypeOf(obj), target.prototype);