Session object can be null if db/memcache is not available

1 files changed, 1 insertions, 1 deletions

diff --git a/program/include/rcmail.php b/program/include/rcmail.php
index dba846dd2..72f0efa92 100644
--- a/program/include/rcmail.php
+++ b/program/include/rcmail.php
@@ -1165,7 +1165,7 @@ class rcmail
       $this->imap->close();
 
     // before closing the database connection, write session data
-    if ($_SERVER['REMOTE_ADDR']) {
+    if ($_SERVER['REMOTE_ADDR'] && is_object($this->session)) {
       $this->session->cleanup();
       session_write_close();
     }