From f59003bdde70dbe00c67c35dba49d8f929df506d Mon Sep 17 00:00:00 2001
From: Pavel Dohnal <pavel@mailpoet.com>
Date: Tue, 21 Apr 2020 16:00:00 +0200
Subject: [PATCH] Make sure Newsletter is the right type

[MAILPOET-2716]
---
 lib/Cron/Workers/Scheduler.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/Cron/Workers/Scheduler.php b/lib/Cron/Workers/Scheduler.php
index f6d83c7602..d10de85f96 100644
--- a/lib/Cron/Workers/Scheduler.php
+++ b/lib/Cron/Workers/Scheduler.php
@@ -232,6 +232,9 @@ class Scheduler {
 
   public function createNotificationHistory($newsletterId) {
     $newsletter = Newsletter::findOne($newsletterId);
+    if (!$newsletter instanceof Newsletter) {
+      return false;
+    }
     $notificationHistory = $newsletter->createNotificationHistory();
     return ($notificationHistory->getErrors() === false) ?
       $notificationHistory :