fix Check if it has session before getSession()

src/Symfony/Component/Security/Http/EventListener/SessionLogoutListener.php

@@ -25,7 +25,9 @@ class SessionLogoutListener implements EventSubscriberInterface
 {
     public function onLogout(LogoutEvent $event): void
     {
-        $event->getRequest()->getSession()->invalidate();
+        if ($event->getRequest()->hasSession()) {
+            $event->getRequest()->getSession()->invalidate();
+        }
     }
 
     public static function getSubscribedEvents(): array

src/Symfony/Component/Security/Http/Tests/EventListener/SessionLogoutListenerTest.php

@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Security\Http\Tests\EventListener;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Session\Session;
+use Symfony\Component\Security\Http\Event\LogoutEvent;
+use Symfony\Component\Security\Http\EventListener\SessionLogoutListener;
+
+class SessionLogoutListenerTest extends TestCase
+{
+    public function testOnLogoutIfHasNoSession()
+    {
+        $request = $this->createMock(Request::class);
+        $request->method('hasSession')->willReturn(false);
+        $request->expects($this->never())->method('getSession');
+
+        $sessionLogoutListener = new SessionLogoutListener();
+        $sessionLogoutListener->onLogout(new LogoutEvent($request, null));
+    }
+
+    public function testOnLogoutIfHasSession()
+    {
+        $session = $this->createMock(Session::class);
+        $session->expects($this->once())->method('invalidate');
+
+        $request = $this->createMock(Request::class);
+        $request->method('getSession')->willReturn($session);
+        $request->method('hasSession')->willReturn(true);
+
+        $sessionLogoutListener = new SessionLogoutListener();
+        $sessionLogoutListener->onLogout(new LogoutEvent($request, null));
+    }
+}