Merge branch '7.1' into 7.2

* 7.1:
  do not access typed property before initialization
  do not access typed properties before initialization
  Fix typo in deprecation message
  Symfony 5.4 LTS will get security fixes until Feb 2029 thanks to Ibexa' sponsoring
  Fix #53037

KernelBrowser.php

@@ -56,7 +56,7 @@ public function getKernel(): KernelInterface
      */
     public function getProfile(): HttpProfile|false|null
     {
-        if (null === $this->response || !$this->getContainer()->has('profiler')) {
+        if (!isset($this->response) || !$this->getContainer()->has('profiler')) {
             return false;
         }
 

Tests/KernelBrowserTest.php

@@ -14,6 +14,7 @@
 use Symfony\Bundle\FrameworkBundle\KernelBrowser;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\AbstractWebTestCase;
 use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\KernelInterface;
 
 class KernelBrowserTest extends AbstractWebTestCase
 {
@@ -61,6 +62,13 @@ public function testRequestAfterKernelShutdownAndPerformedRequest()
         $client->request('GET', '/');
     }
 
+    public function testGetProfileWithoutRequest()
+    {
+        $browser = new KernelBrowser($this->createMock(KernelInterface::class));
+
+        $this->assertFalse($browser->getProfile());
+    }
+
     private function getKernelMock()
     {
         $mock = $this->getMockBuilder($this->getKernelClass())