#15205: Postpone instantiation of session config by using a proxy

Author: Francesco Marangi

app/etc/di.xml

@@ -273,6 +273,11 @@
             <argument name="pathInfoProcessor" xsi:type="object">Magento\Backend\App\Request\PathInfoProcessor\Proxy</argument>
         </arguments>
     </type>
+    <type name="Magento\Framework\App\Response\Http">
+        <arguments>
+            <argument name="sessionConfig" xsi:type="object">Magento\Framework\Session\Config\ConfigInterface\Proxy</argument>
+        </arguments>
+    </type>
     <preference for="Magento\Framework\Session\SaveHandlerInterface" type="Magento\Framework\Session\SaveHandler" />
     <type name="Magento\Framework\Session\SaveHandlerFactory">
         <arguments>

lib/internal/Magento/Framework/App/Response/Http.php

@@ -71,14 +71,14 @@ public function __construct(
         CookieMetadataFactory $cookieMetadataFactory,
         Context $context,
         DateTime $dateTime,
-        ConfigInterface $sessionConfig = null
+        ConfigInterface $sessionConfig
     ) {
         $this->request = $request;
         $this->cookieManager = $cookieManager;
         $this->cookieMetadataFactory = $cookieMetadataFactory;
         $this->context = $context;
         $this->dateTime = $dateTime;
-        $this->sessionConfig = $sessionConfig ?: ObjectManager::getInstance()->get(ConfigInterface::class);
+        $this->sessionConfig = $sessionConfig;
     }
 
     /**