Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/dependency-injection/Dumper/Dumper.php

@@ -0,0 +1,38 @@
+<?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\Dumper;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+/**
+ * Dumper is the abstract class for all built-in dumpers.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @api
+ */
+abstract class Dumper implements DumperInterface
+{
+    protected $container;
+
+    /**
+     * Constructor.
+     *
+     * @param ContainerBuilder $container The service container to dump
+     *
+     * @api
+     */
+    public function __construct(ContainerBuilder $container)
+    {
+        $this->container = $container;
+    }
+}