Fix so when moving to Trash we make sure the folder exists (#5192)

CHANGELOG

@@ -53,6 +53,7 @@ CHANGELOG Roundcube Webmail
 - Fix error causing empty INBOX listing in Firefox when using an URL with user:password specified (#5400)
 - Fix PHP warning when handling shared namespace with empty prefix (#5420)
 - Fix so folders list is scrolled to the selected folder on page load (#5424)
+- Fix so when moving to Trash we make sure the folder exists (#5192)
 
 RELEASE 1.2.1
 -------------

program/lib/Roundcube/rcube_imap.php

@@ -2596,6 +2596,14 @@ class rcube_imap extends rcube_storage
         // move messages
         $moved = $this->conn->move($uids, $from_mbox, $to_mbox);
 
+        // when moving to Trash we make sure the folder exists
+        // as it's uncommon scenario we do this when MOVE fails, not before
+        if (!$moved && $to_trash && $this->get_response_code() == rcube_storage::TRYCREATE) {
+            if ($this->create_folder($to_mbox, true, 'trash')) {
+                $moved = $this->conn->move($uids, $from_mbox, $to_mbox);
+            }
+        }
+
         if ($moved) {
             $this->clear_messagecount($from_mbox);
             $this->clear_messagecount($to_mbox);