Translations:Manual:Interface/Sidebar/109/en

There is a bug on 1.18 where if a line on MediaWiki:Sidebar contains pipe characters (| ) before expanding parser functions, but not after expanding parser functions, an exception is thrown on all pages (bug 33321). If such a construction is accidentally introduced to the sidebar, it forces the user to revert MediaWiki:Sidebar using the API or edit.php. This is fixed in later versions of MediaWiki