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

vendor/symfony/dependency-injection/LazyProxy/Instantiator/RealServiceInstantiator.php

@@ -0,0 +1,33 @@
+<?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\LazyProxy\Instantiator;
+
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Definition;
+
+/**
+ * {@inheritdoc}
+ *
+ * Noop proxy instantiator - simply produces the real service instead of a proxy instance.
+ *
+ * @author Marco Pivetta <ocramius@gmail.com>
+ */
+class RealServiceInstantiator implements InstantiatorInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function instantiateProxy(ContainerInterface $container, Definition $definition, $id, $realInstantiator)
+    {
+        return call_user_func($realInstantiator);
+    }
+}