diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_6/Generators/delegating-yield-11.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_6/Generators/delegating-yield-11.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+// The first call to yield* passes one arg to "next".
+
+function Iter() {
+    function next() {
+        if (arguments.length != 1)
+            throw Error;
+        return { value: 42, done: true }
+    }
+
+    this.next = next;
+    this[std_iterator] = function () { return this; }
+}
+
+function* delegate(iter) { return yield* iter; }
+
+var iter = delegate(new Iter());
+assertDeepEq(iter.next(), {value:42, done:true});
+
+if (typeof reportCompare == "function")
+    reportCompare(true, true);