Fix issue in displaying filter form when managesieve_kolab_master=true

and sieve variables extension is supported by the server (#1489599)

1 files changed, 1 insertions, 0 deletions

diff --git a/plugins/managesieve/lib/Roundcube/rcube_sieve_script.php b/plugins/managesieve/lib/Roundcube/rcube_sieve_script.php
index 6fbc3f89d..c6ad78add 100644
--- a/plugins/managesieve/lib/Roundcube/rcube_sieve_script.php
+++ b/plugins/managesieve/lib/Roundcube/rcube_sieve_script.php
@@ -585,6 +585,7 @@ class rcube_sieve_script
                     if ($rule[0]['type'] == 'set') {
                         unset($rule[0]['type']);
                         $this->vars[] = $rule[0];
+                        unset($rule);
                     }
                     else {
                         $rule = array('actions' => $rule);