From d6adfd5c298e4b49b9c693ae7f431c70bf7621a3 Mon Sep 17 00:00:00 2001
From: Christian Weiske <cweiske@cweiske.de>
Date: Fri, 21 Apr 2023 22:25:29 +0200
Subject: [PATCH] Fix PHP warning: Trying to access array offset on value of
 type null

> PHP Warning:  Trying to access array offset on value of type null
> in plugins/nextcloud_sql_addressbook/nextcloud_sql_addressbook.php
> on line 97
---
 nextcloud_sql_addressbook.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nextcloud_sql_addressbook.php b/nextcloud_sql_addressbook.php
index 146aebe..5c52fde 100644
--- a/nextcloud_sql_addressbook.php
+++ b/nextcloud_sql_addressbook.php
@@ -93,6 +93,10 @@ class nextcloud_sql_addressbook extends rcube_plugin
      */
     protected function listAddressbooks()
     {
+        if (!isset($this->rcube->user->data)) {
+            return [];
+        }
+
         $principalUri = 'principals/users/'
             . $this->rcube->user->data['username'];
 
-- 
2.30.2