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

vendor/symfony/dependency-injection/Tests/Fixtures/containers/container11.php

@@ -0,0 +1,12 @@
+<?php
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+
+$container = new ContainerBuilder();
+$container->
+    register('foo', 'FooClass')->
+    addArgument(new Definition('BarClass', array(new Definition('BazClass'))))
+;
+
+return $container;