From 1a4d50ddfc5ecec7e16468eb811504d4e54e0a45 Mon Sep 17 00:00:00 2001
From: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Date: Tue, 26 Jul 2022 14:55:02 +0200
Subject: [PATCH] Bug 31244: Fix 500 if logout and not logged in

Can't use an undefined value as a HASH reference at /kohadevbox/koha/C4/Auth.pm line 985
        C4::Auth::checkauth('CGI=HASH(0x5603b7dc4300)', 0, 'HASH(0x5603b2633238)', 'intranet', undef, 'intranet-main.tt') called at /kohadevbox/koha/C4/Auth.pm line 186
        C4::Auth::get_template_and_user('HASH(0x5603b7b83d08)') called at /kohadevbox/koha/mainpage.pl line 40

Test plan:
Open a private window
Hit /cgi-bin/koha/mainpage.pl?logout.x=1

Signed-off-by: Sally <sally.healey@cheshiresharedservices.gov.uk>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
---
 C4/Auth.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/C4/Auth.pm b/C4/Auth.pm
index a44cd09767..9d44366e49 100644
--- a/C4/Auth.pm
+++ b/C4/Auth.pm
@@ -982,7 +982,7 @@ sub checkauth {
 
         # voluntary logout the user
         # check wether the user was using their shibboleth session or a local one
-        my $shibSuccess = C4::Context->userenv->{'shibboleth'};
+        my $shibSuccess = C4::Context->userenv ? C4::Context->userenv->{'shibboleth'} : undef;
         if ( $session ) {
             $session->delete();
             $session->flush;
-- 
2.37.1