Bug 14787 added a cookie 'patronSessionConfirmation'. But code is using it with a strange : my $patron_session_confirmation = $query->cookie('patronSessionConfirmation') || undef; Then uses in split(). It generates warning : Use of uninitialized value $patron_session_confirmation in split at circ/circulation.pl
Can we just change with empty string ? my $patron_session_confirmation = $query->cookie('patronSessionConfirmation') || q{};