From 1c7a1b5124a13ec3126eb352a9d4911902464d00 Mon Sep 17 00:00:00 2001
From: Michael M Slusarz <slusarz@curecanti.org>
Date: Tue, 31 Aug 2010 23:41:10 -0600
Subject: [PATCH] Check for existence.

---
 imp/lib/Imap/Tree.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/imp/lib/Imap/Tree.php b/imp/lib/Imap/Tree.php
index 5ac76e58d..af6b5c46e 100644
--- a/imp/lib/Imap/Tree.php
+++ b/imp/lib/Imap/Tree.php
@@ -1788,6 +1788,7 @@ class IMP_Imap_Tree implements ArrayAccess, Iterator
 
             /* If element exists in ancestors list, it is valid. */
             if (isset($c['ancestors']) &&
+                isset($c['ancestors'][$this->_currparent]) &&
                 ($c['ancestors'][$this->_currparent] == $this->_currkey)) {
                 return true;
             }
-- 
2.11.0