Merge branch '3.4' into 4.3

* 3.4:
  #30432 fix an error message
  fix paths to detect code owners
  [Validator] Ensure numeric subpaths do not cause errors on PHP 7.4
  Remove unused local variables in tests
  Make sure to collect child forms created on *_SET_DATA events
  do not render errors for checkboxes twice

Author: nicolas-grekas

Console/Descriptor/TextDescriptor.php

@@ -508,7 +508,6 @@ private function renderEventListenerTable(EventDispatcherInterface $eventDispatc
         $tableHeaders = ['Order', 'Callable', 'Priority'];
         $tableRows = [];
 
-        $order = 1;
         foreach ($eventListeners as $order => $listener) {
             $tableRows[] = [sprintf('#%d', $order + 1), $this->formatCallable($listener), $eventDispatcher->getListenerPriority($event, $listener)];
         }

Tests/Controller/ControllerTraitTest.php

@@ -277,8 +277,7 @@ public function testFileWhichDoesNotExist()
         $this->expectException('Symfony\Component\HttpFoundation\File\Exception\FileNotFoundException');
         $controller = $this->createController();
 
-        /* @var BinaryFileResponse $response */
-        $response = $controller->file('some-file.txt', 'test.php');
+        $controller->file('some-file.txt', 'test.php');
     }
 
     public function testIsGranted()

Tests/Functional/Bundle/TestBundle/DependencyInjection/TestExtension.php

@@ -26,7 +26,7 @@ class TestExtension extends Extension implements PrependExtensionInterface
     public function load(array $configs, ContainerBuilder $container)
     {
         $configuration = $this->getConfiguration($configs, $container);
-        $config = $this->processConfiguration($configuration, $configs);
+        $this->processConfiguration($configuration, $configs);
 
         $container->setAlias('test.annotation_reader', new Alias('annotation_reader', true));
     }

Tests/Functional/SessionTest.php

@@ -59,7 +59,7 @@ public function testFlash($config, $insulate)
         }
 
         // set flash
-        $crawler = $client->request('GET', '/session_setflash/Hello%20world.');
+        $client->request('GET', '/session_setflash/Hello%20world.');
 
         // check flash displays on redirect
         $this->assertStringContainsString('Hello world.', $client->followRedirect()->text());