Error in vendor/magento/module-shipping/Model/Config/Source/Allmethods.php - public function toOptionArray

Author: mrodespin

app/code/Magento/Shipping/Model/Config/Source/Allmethods.php

@@ -56,6 +56,11 @@ public function toOptionArray($isActiveOnlyFlag = false)
             );
             $methods[$carrierCode] = ['label' => $carrierTitle, 'value' => []];
             foreach ($carrierMethods as $methodCode => $methodTitle) {
+
+                /** Check it $carrierMethods array was well formed */
+                if (!$methodCode) {
+                    continue;
+                }
                 $methods[$carrierCode]['value'][] = [
                     'value' => $carrierCode . '_' . $methodCode,
                     'label' => '[' . $carrierCode . '] ' . $methodTitle,