Thread:Extension talk:Access Control Panel/Mediawiki 1.23 Call to undefined method SpecialPage::SpecialPage()

It's not possible to call Specialpage anymore because of this error. I found a solution here: https://www.mail-archive.com/wikibugs-l@lists.wikimedia.org/msg53602.html. In the file AccessControlPanel.body.php I replaced the lines

by

as suggested and now it works again. There should be a version control to choose the old behaviour in old mediawikis and change to the new in Mediawiki 1.23