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

vendor/symfony/http-kernel/Tests/Fixtures/ExtensionPresentBundle/Command/BarCommand.php

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+<?php
+
+namespace Symfony\Component\HttpKernel\Tests\Fixtures\ExtensionPresentBundle\Command;
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\HttpKernel\Bundle;
+
+/**
+ * This command has a required parameter on the constructor and will be ignored by the default Bundle implementation.
+ *
+ * @see Bundle::registerCommands()
+ */
+class BarCommand extends Command
+{
+    public function __construct($example, $name = 'bar')
+    {
+    }
+}

vendor/symfony/http-kernel/Tests/Fixtures/ExtensionPresentBundle/Command/FooCommand.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\Tests\Fixtures\ExtensionPresentBundle\Command;
+
+use Symfony\Component\Console\Command\Command;
+
+class FooCommand extends Command
+{
+    protected function configure()
+    {
+        $this->setName('foo');
+    }
+}

vendor/symfony/http-kernel/Tests/Fixtures/ExtensionPresentBundle/DependencyInjection/ExtensionPresentExtension.php

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+<?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\HttpKernel\Tests\Fixtures\ExtensionPresentBundle\DependencyInjection;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+
+class ExtensionPresentExtension extends Extension
+{
+    public function load(array $configs, ContainerBuilder $container)
+    {
+    }
+}

vendor/symfony/http-kernel/Tests/Fixtures/ExtensionPresentBundle/ExtensionPresentBundle.php

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+<?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\HttpKernel\Tests\Fixtures\ExtensionPresentBundle;
+
+use Symfony\Component\HttpKernel\Bundle\Bundle;
+
+class ExtensionPresentBundle extends Bundle
+{
+}