note 113341 added to function.unset

This is a bug or i missing something? <?php $a = function() use (&$a){ unset($a); // all good? }; $b = function() use (&$b){ $b = null; // Fatal error: Cannot destroy active lambda function }; var_dump($a(), $b()); ?> ---- Server IP: 69.147.83.199 Probable Submitter: 5.28.161.23 ---- Manual Page -- http://php.net/manual/en/function.unset.php Edit -- https://master.php.net/note/edit/113341 Del: integrated -- https://master.php.net/note/delete/113341/integrated Del: useless -- https://master.php.net/note/delete/113341/useless Del: bad code -- https://master.php.net/note/delete/113341/bad+code Del: spam -- https://master.php.net/note/delete/113341/spam Del: non-english -- https://master.php.net/note/delete/113341/non-english Del: in docs -- https://master.php.net/note/delete/113341/in+docs Del: other reasons-- https://master.php.net/note/delete/113341 Reject -- https://master.php.net/note/reject/113341 Search -- https://master.php.net/manage/user-notes.php