From 191463693a45eed85f6b427ed8b82620d0b1047b Mon Sep 17 00:00:00 2001
From: Daniel Ruf <mac1@daniel-ruf.de>
Date: Fri, 7 Feb 2020 22:34:41 +0100
Subject: [PATCH] fix: prevent undefined index error - closes #26762

---
 .../src/Magento/Setup/Model/ConfigOptionsList/DriverOptions.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/setup/src/Magento/Setup/Model/ConfigOptionsList/DriverOptions.php b/setup/src/Magento/Setup/Model/ConfigOptionsList/DriverOptions.php
index 1d9fdd6098cbb..3dd2af0c4bdc8 100644
--- a/setup/src/Magento/Setup/Model/ConfigOptionsList/DriverOptions.php
+++ b/setup/src/Magento/Setup/Model/ConfigOptionsList/DriverOptions.php
@@ -46,6 +46,6 @@ public function getDriverOptions(array $options): array
      */
     private function optionExists($options, $driverOptionKey): bool
     {
-        return $options[$driverOptionKey] === false || !empty($options[$driverOptionKey]);
+        return isset($options[$driverOptionKey]) && ($options[$driverOptionKey] === false || !empty($options[$driverOptionKey]));
     }
 }