From a3644638aaf0418598196a870204e0b632a4c8ad Mon Sep 17 00:00:00 2001
From: Thomas Bruederli <thomas@roundcube.net>
Date: Fri, 17 Apr 2015 06:28:40 -0400
Subject: [PATCH] Allow preference sections to define CSS class names

---
 plugins/database_attachments/database_attachments.php |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/plugins/database_attachments/database_attachments.php b/plugins/database_attachments/database_attachments.php
index 5ec3514..e4abf93 100644
--- a/plugins/database_attachments/database_attachments.php
+++ b/plugins/database_attachments/database_attachments.php
@@ -126,8 +126,10 @@
      */
     function cleanup($args)
     {
-        $cache = $this->get_cache();
-        $cache->remove($args['group'], true);
+        // check if cache object exist, it may be empty on session_destroy (#1489726)
+        if ($cache = $this->get_cache()) {
+            $cache->remove($args['group'], true);
+        }
     }
 
     /**

--
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