From a9e198c8b4e4eaee2438cd89d2e3d6e3e6e93bd5 Mon Sep 17 00:00:00 2001
From: SeriousKen <ken@seriousbrewing.co.uk>
Date: Mon, 20 May 2019 06:32:29 +0100
Subject: [PATCH] Add check to make sure event result is an array in Form
 widget (#4331)

Wildcard listeners will add null responses to the event result array and causes an error when they are merged into the result. This PR adds a check to see if each event result is an array before adding it to the result array.

Credit to @SeriousKen. Fixes https://github.com/OFFLINE-GmbH/oc-clockwork-plugin/issues/1
---
 modules/backend/widgets/Form.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/backend/widgets/Form.php b/modules/backend/widgets/Form.php
index c7e702a99..741fc7d46 100644
--- a/modules/backend/widgets/Form.php
+++ b/modules/backend/widgets/Form.php
@@ -449,6 +449,10 @@ class Form extends WidgetBase
         $eventResults = $this->fireSystemEvent('backend.form.refresh', [$result], false);
 
         foreach ($eventResults as $eventResult) {
+            if (!is_array($eventResult)) {
+                continue;
+            }
+            
             $result = $eventResult + $result;
         }