Fix #369: Add test.

Author: dim-s

jphp-core/tests/resources/generators/bug369.phpt

@@ -6,6 +6,18 @@ yield can be used without a value
 $a = function() { var_dump((yield)['a']); };
 $a()->send(['a' => 'pony']);
 
+function a() {
+    yield 77;
+    return ['a' => 'pony'];
+}
+$a = function() { var_dump((yield from a())['a']); };
+
+foreach ($a() as $v) {
+    var_dump($v);
+}
+
 ?>
 --EXPECT--
+string(4) "pony"
+int(77)
 string(4) "pony"