From 208abdd63773352fb6076ef70b2e6ba259df3d5e Mon Sep 17 00:00:00 2001
From: Marcel <marcel.moldovan@zoho.com>
Date: Wed, 14 Feb 2018 11:54:54 +0200
Subject: [PATCH] :bug: Fix possible undefined index when caching config data

---
 app/code/Magento/Config/App/Config/Type/System.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/code/Magento/Config/App/Config/Type/System.php b/app/code/Magento/Config/App/Config/Type/System.php
index 4f6d9c14346f0..479b4f5c21732 100644
--- a/app/code/Magento/Config/App/Config/Type/System.php
+++ b/app/code/Magento/Config/App/Config/Type/System.php
@@ -245,7 +245,7 @@ private function cacheData(array $data)
         );
         $scopes = [];
         foreach (['websites', 'stores'] as $curScopeType) {
-            foreach ($data[$curScopeType] as $curScopeId => $curScopeData) {
+            foreach ($data[$curScopeType] ?? [] as $curScopeId => $curScopeData) {
                 $scopes[$curScopeType][$curScopeId] = 1;
                 $this->cache->save(
                     $this->serializer->serialize($curScopeData),