fix compat with Symfony 5

Author: nicolas-grekas

phpstan.neon.dist

@@ -116,10 +116,12 @@ parameters:
 		-
 			message: '#Parameter \$exception of method ApiPlatform\\Core\\Action\\ExceptionAction::__invoke\(\) has invalid typehint type Symfony\\Component\\ErrorHandler\\Exception\\FlattenException\.#'
 			path: %currentWorkingDirectory%/src/Action/ExceptionAction.php
+
 		- '#Call to method get(Class|Headers|StatusCode)\(\) on an unknown class Symfony\\Component\\ErrorHandler\\Exception\\FlattenException\.#'
 		- '#Class Symfony\\Component\\ErrorHandler\\Exception\\FlattenException not found\.#'
 		-
 			message: '#Instanceof between bool\|float\|int|null and ArrayObject will always evaluate to false\.#'
 			paths:
 				- %currentWorkingDirectory%/src/JsonApi/Serializer/ItemNormalizer.php
 				- %currentWorkingDirectory%/src/Serializer/AbstractItemNormalizer.php
+		- '#Symfony\\Component\\HttpKernel\\EventListener\\ErrorListener#'

src/Bridge/Symfony/Validator/EventListener/ValidationExceptionListener.php

@@ -40,7 +40,7 @@ public function __construct(SerializerInterface $serializer, array $errorFormats
      */
     public function onKernelException(ExceptionEvent $event): void
     {
-        $exception = $event->getException();
+        $exception = method_exists($event, 'getThrowable') ? $event->getThrowable() : $event->getException();
         if (!$exception instanceof ValidationException) {
             return;
         }

src/EventListener/ExceptionListener.php

@@ -16,6 +16,7 @@
 use ApiPlatform\Core\Util\RequestAttributesExtractor;
 use Psr\Log\LoggerInterface;
 use Symfony\Component\HttpKernel\Event\ExceptionEvent;
+use Symfony\Component\HttpKernel\EventListener\ErrorListener;
 use Symfony\Component\HttpKernel\EventListener\ExceptionListener as BaseExceptionListener;
 
 /**
@@ -30,7 +31,11 @@ final class ExceptionListener
 
     public function __construct($controller, LoggerInterface $logger = null, $debug = false)
     {
-        $this->exceptionListener = new BaseExceptionListener($controller, $logger, $debug);
+        if (class_exists(ErrorListener::class)) {
+            $this->exceptionListener = new ErrorListener($controller, $logger, $debug);
+        } else {
+            $this->exceptionListener = new BaseExceptionListener($controller, $logger, $debug);
+        }
     }
 
     public function onKernelException(ExceptionEvent $event): void