Initialize rcube instance (with options); no caches without a valid user_id

1 files changed, 2 insertions, 2 deletions

diff --git a/program/include/rcube_imap.php b/program/include/rcube_imap.php
index 00a4158fe..57b85c34e 100644
--- a/program/include/rcube_imap.php
+++ b/program/include/rcube_imap.php
@@ -3742,9 +3742,9 @@ class rcube_imap extends rcube_storage
     {
         if ($this->messages_caching && !$this->mcache) {
             $rcube = rcube::get_instance();
-            if ($dbh = $rcube->get_dbh()) {
+            if (($dbh = $rcube->get_dbh()) && ($userid = $rcube->get_user_id())) {
                 $this->mcache = new rcube_imap_cache(
-                    $dbh, $this, $rcube->get_user_id(), $this->options['skip_deleted']);
+                    $dbh, $this, $userid, $this->options['skip_deleted']);
             }
         }