Ticket #11518: 11518.2.patch

wp-includes/default-widgets.php

@@ -732 +732 @@
                         echo $before_title . $title . $after_title;
                 wp_widget_rss_output( $rss, $instance );
                 echo $after_widget;
-                $rss->__destruct(); 
-                unset($rss);
+                $rss = null; // paranoid unset
         }
 
         function update($new_instance, $old_instance) {