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

vendor/symfony/routing/Loader/PhpFileLoader.php

@@ -0,0 +1,72 @@
+<?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\Routing\Loader;
+
+use Symfony\Component\Config\Loader\FileLoader;
+use Symfony\Component\Config\Resource\FileResource;
+use Symfony\Component\Routing\RouteCollection;
+
+/**
+ * PhpFileLoader loads routes from a PHP file.
+ *
+ * The file must return a RouteCollection instance.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @api
+ */
+class PhpFileLoader extends FileLoader
+{
+    /**
+     * Loads a PHP file.
+     *
+     * @param string      $file A PHP file path
+     * @param string|null $type The resource type
+     *
+     * @return RouteCollection A RouteCollection instance
+     *
+     * @api
+     */
+    public function load($file, $type = null)
+    {
+        $path = $this->locator->locate($file);
+        $this->setCurrentDir(dirname($path));
+
+        $collection = self::includeFile($path, $this);
+        $collection->addResource(new FileResource($path));
+
+        return $collection;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @api
+     */
+    public function supports($resource, $type = null)
+    {
+        return is_string($resource) && 'php' === pathinfo($resource, PATHINFO_EXTENSION) && (!$type || 'php' === $type);
+    }
+
+    /**
+     * Safe include. Used for scope isolation.
+     *
+     * @param string        $file   File to include
+     * @param PhpFileLoader $loader the loader variable is exposed to the included file below
+     *
+     * @return RouteCollection
+     */
+    private static function includeFile($file, PhpFileLoader $loader)
+    {
+        return include $file;
+    }
+}