diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_6/Generators/delegating-yield-4.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_6/Generators/delegating-yield-4.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+// With yield*, inner and outer iterators can be invoked separately.
+
+function* g(n) { for (var i=0; i<n; i++) yield i; }
+function* delegate(iter) { return yield* iter; }
+
+var inner = g(20);
+var outer1 = delegate(inner);
+var outer2 = delegate(inner);
+
+assertIteratorNext(outer1, 0);
+assertIteratorNext(outer2, 1);
+assertIteratorNext(inner, 2);
+assertIteratorNext(outer1, 3);
+assertIteratorNext(outer2, 4);
+assertIteratorNext(inner, 5);
+
+if (typeof reportCompare == "function")
+    reportCompare(true, true);