only in patch2:
unchanged:
--- a/core/lib/Drupal/Core/CoreBundle.php
+++ b/core/lib/Drupal/Core/CoreBundle.php
@@ -98,7 +98,8 @@ public function build(ContainerBuilder $container) {
       ->setSynthetic(TRUE);
 
     $container->register('event_dispatcher', 'Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher')
-      ->addArgument(new Reference('service_container'));
+      ->addArgument(new Reference('service_container'))
+      ->addTag('persist');
     $container->register('resolver', 'Drupal\Core\ControllerResolver')
       ->addArgument(new Reference('service_container'));
     $container->register('http_kernel', 'Drupal\Core\HttpKernel')