Ticket #17670: 17670.3.diff

wp-includes/post.php

@@ -3180 +3180 @@
                         $curpage = wp_cache_get( $post_parent, 'posts' );
                         if ( false === $curpage )
                                 $curpage = $wpdb->get_row( $wpdb->prepare( "SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE ID = %d and post_type = %s", $post_parent, $post_type ) );
+                        if ( ! $curpage )
+                                break;
                         $path = '/' . $curpage->post_name . $path;
                 }