Ticket #34259: 34259.2.diff

src/wp-includes/rewrite-functions.php

@@ -103 +103 @@
         $hook = 'do_feed_' . $feedname;
         // Remove default function hook
         remove_action($hook, $hook);
-        add_action($hook, $function, 10, 1);
+        add_action( $hook, $function, 10, 2 );
         return $hook;
 }