removed deprecated method call in the exception handler

src/Silex/ExceptionHandler.php

@@ -12,7 +12,9 @@
 namespace Silex;
 
 use Symfony\Component\Debug\ExceptionHandler as DebugExceptionHandler;
+use Symfony\Component\Debug\Exception\FlattenException;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
 use Symfony\Component\HttpKernel\KernelEvents;
 
@@ -48,7 +50,19 @@ class ExceptionHandler implements EventSubscriberInterface
 
         $handler = new DebugExceptionHandler($this->debug);
 
-        $event->setResponse($handler->createResponse($event->getException()));
+        if (method_exists($handler, 'getHtml')) {
+            $exception = $event->getException();
+            if (!$exception instanceof FlattenException) {
+                $exception = FlattenException::create($exception);
+            }
+
+            $response = Response::create($handler->getHtml($exception), $exception->getStatusCode(), $exception->getHeaders())->setCharset(ini_get('default_charset'));
+        } else {
+            // BC with Symfony < 2.8
+            $response = $handler->createResponse($event->getException());
+        }
+
+        $event->setResponse($response);
     }
 
     /**