diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/arrow-functions/params-rest-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/arrow-functions/params-rest-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,5 @@
+// Rest parameters work in arrow functions
+
+var f = (a, b, ...rest) => [a, b, rest];
+assertEq(f().toSource(), "[(void 0), (void 0), []]");
+assertEq(f(1, 2, 3, 4).toSource(), "[1, 2, [3, 4]]");