default services conflit ?

old.vendor/symfony/dependency-injection/ServiceSubscriberInterface.php

@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection;
+
+use Symfony\Contracts\Service\ServiceSubscriberInterface as BaseServiceSubscriberInterface;
+
+/**
+ * {@inheritdoc}
+ *
+ * @deprecated since Symfony 4.2, use Symfony\Contracts\Service\ServiceSubscriberInterface instead.
+ */
+interface ServiceSubscriberInterface extends BaseServiceSubscriberInterface
+{
+}