Erreur interne

Detected bug in an extension! Hook fnEditWarning_edit has invalid call signature; Parameter 1 to fnEditWarning_edit() expected to be a reference, value given

Backtrace:

#0 /home/formationn/www/mercurewiki/includes/EditPage.php(313): wfRunHooks('AlternateEdit', Array)
#1 /home/formationn/www/mercurewiki/includes/EditPage.php(296): EditPage->edit()
#2 /home/formationn/www/mercurewiki/includes/Wiki.php(533): EditPage->submit()
#3 /home/formationn/www/mercurewiki/includes/Wiki.php(69): MediaWiki->performAction(Object(OutputPage), Object(ImagePage), Object(Title), Object(User), Object(WebRequest))
#4 /home/formationn/www/mercurewiki/index.php(114): MediaWiki->performRequestForTitle(Object(Title), Object(ImagePage), Object(OutputPage), Object(User), Object(WebRequest))
#5 /home/formationn/www/mercurewiki/index.php5(1): require('/home/formation...')
#6 {main}