Merge branch '4.4' into 5.4

* 4.4:
  [Console] Better required argument check in InputArgument
  [EventDispatcher] Fix removing listeners when using first-class callable syntax

Author: nicolas-grekas

Tests/Firewall/ContextListenerTest.php

@@ -381,6 +381,30 @@ public function testSessionIsNotReported()
         $listener(new RequestEvent($this->createMock(HttpKernelInterface::class), $request, HttpKernelInterface::MAIN_REQUEST));
     }
 
+    public function testOnKernelResponseRemoveListener()
+    {
+        $tokenStorage = new TokenStorage();
+        $tokenStorage->setToken(new UsernamePasswordToken(new InMemoryUser('test1', 'pass1'), 'phpunit', ['ROLE_USER']));
+
+        $request = new Request();
+        $request->attributes->set('_security_firewall_run', '_security_session');
+
+        $session = new Session(new MockArraySessionStorage());
+        $request->setSession($session);
+
+        $dispatcher = new EventDispatcher();
+        $httpKernel = $this->createMock(HttpKernelInterface::class);
+
+        $listener = new ContextListener($tokenStorage, [], 'session', null, $dispatcher, null, \Closure::fromCallable([$tokenStorage, 'getToken']));
+        $this->assertEmpty($dispatcher->getListeners());
+
+        $listener(new RequestEvent($httpKernel, $request, HttpKernelInterface::MASTER_REQUEST));
+        $this->assertNotEmpty($dispatcher->getListeners());
+
+        $listener->onKernelResponse(new ResponseEvent($httpKernel, $request, HttpKernelInterface::MASTER_REQUEST, new Response()));
+        $this->assertEmpty($dispatcher->getListeners());
+    }
+
     protected function runSessionOnKernelResponse($newToken, $original = null)
     {
         $session = new Session(new MockArraySessionStorage());

Tests/Firewall/ExceptionListenerTest.php

@@ -12,6 +12,7 @@
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Event\ExceptionEvent;
@@ -170,6 +171,18 @@ public function testLogoutException()
         $this->assertEquals(403, $event->getThrowable()->getStatusCode());
     }
 
+    public function testUnregister()
+    {
+        $listener = $this->createExceptionListener();
+        $dispatcher = new EventDispatcher();
+
+        $listener->register($dispatcher);
+        $this->assertNotEmpty($dispatcher->getListeners());
+
+        $listener->unregister($dispatcher);
+        $this->assertEmpty($dispatcher->getListeners());
+    }
+
     public function getAccessDeniedExceptionProvider()
     {
         return [