Ticket #18718: 18718.patch

wp-admin/edit-tags.php

@@ -113 +113 @@
 case 'edit':
         $title = $tax->labels->edit_item;
 
-        require_once ( 'admin-header.php' );
         $tag_ID = (int) $_REQUEST['tag_ID'];
 
         $tag = get_term( $tag_ID, $taxonomy, OBJECT, 'edit' );
+        if ( !$tag )
+                wp_die( __( 'You attempted to edit an item that doesn’t exist. Perhaps it was deleted?' ) );
+        require_once ( 'admin-header.php' );
         include( './edit-tag-form.php' );
 
 break;