diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_6/Generators/delegating-yield-7.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_6/Generators/delegating-yield-7.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,38 @@
+// The iteratee of yield* can be a proxy.
+
+function results(results) {
+    var i = 0;
+    function iterator() {
+        return this;
+    }
+    function next() {
+        return results[i++];
+    }
+    var ret = { next: next }
+    ret[std_iterator] = iterator;
+    return ret;
+}
+
+function* yield_results(expected) {
+    return yield* Proxy(results(expected), {});
+}
+
+function collect_results(iter) {
+    var ret = [];
+    var result;
+    do {
+        result = iter.next();
+        ret.push(result);
+    } while (!result.done);
+    return ret;
+}
+
+// We have to put a full result for the end, because the return will re-box.
+var expected = [{value: 1}, 13, "foo", {value: 34, done: true}];
+
+// Sanity check.
+assertDeepEq(expected, collect_results(results(expected)));
+assertDeepEq(expected, collect_results(yield_results(expected)));
+
+if (typeof reportCompare == "function")
+    reportCompare(true, true);