fix foreach error for reminder generator

Signed-off-by: Georg Ehrke <developer@georgehrke.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/apps/dav/lib/CalDAV/Reminder/ReminderService.php b/apps/dav/lib/CalDAV/Reminder/ReminderService.php
index f36ddd157cc..dd19c400720 100644
--- a/apps/dav/lib/CalDAV/Reminder/ReminderService.php
+++ b/apps/dav/lib/CalDAV/Reminder/ReminderService.php
@@ -196,6 +196,10 @@ class ReminderService {
 		foreach($recurrenceExceptions as $recurrenceException) {
 			$eventHash = $this->getEventHash($recurrenceException);
 
+			if (!isset($recurrenceException->VALARM)) {
+				continue;
+			}
+
 			foreach($recurrenceException->VALARM as $valarm) {
 				/** @var VAlarm $valarm */
 				$alarmHash = $this->getAlarmHash($valarm);
@@ -216,6 +220,10 @@ class ReminderService {
 			$masterAlarms = [];
 			$masterHash = $this->getEventHash($masterItem);
 
+			if (!isset($masterItem->VALARM)) {
+				return;
+			}
+
 			foreach($masterItem->VALARM as $valarm) {
 				$masterAlarms[] = $this->getAlarmHash($valarm);
 			}