Ticket #14111: ticket.14111.diff

wp-includes/post.php

@@ -2815 +2815 @@
                         $slug = $alt_post_name;
                 }
         }
-
-        return $slug;
+        
+        return apply_filters( "wp_unique_post_slug_{$post_type}", $slug, $post_ID, $post_status, $post_type, $post_parent );
 }
 
 /**