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

vendor/symfony/http-foundation/Session/Storage/Proxy/SessionHandlerProxy.php

@@ -0,0 +1,95 @@
+<?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\HttpFoundation\Session\Storage\Proxy;
+
+/**
+ * SessionHandler proxy.
+ *
+ * @author Drak <drak@zikula.org>
+ */
+class SessionHandlerProxy extends AbstractProxy implements \SessionHandlerInterface
+{
+    /**
+     * @var \SessionHandlerInterface
+     */
+    protected $handler;
+
+    /**
+     * Constructor.
+     *
+     * @param \SessionHandlerInterface $handler
+     */
+    public function __construct(\SessionHandlerInterface $handler)
+    {
+        $this->handler = $handler;
+        $this->wrapper = ($handler instanceof \SessionHandler);
+        $this->saveHandlerName = $this->wrapper ? ini_get('session.save_handler') : 'user';
+    }
+
+    // \SessionHandlerInterface
+
+    /**
+     * {@inheritdoc}
+     */
+    public function open($savePath, $sessionName)
+    {
+        $return = (bool) $this->handler->open($savePath, $sessionName);
+
+        if (true === $return) {
+            $this->active = true;
+        }
+
+        return $return;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function close()
+    {
+        $this->active = false;
+
+        return (bool) $this->handler->close();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function read($sessionId)
+    {
+        return (string) $this->handler->read($sessionId);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function write($sessionId, $data)
+    {
+        return (bool) $this->handler->write($sessionId, $data);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function destroy($sessionId)
+    {
+        return (bool) $this->handler->destroy($sessionId);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function gc($maxlifetime)
+    {
+        return (bool) $this->handler->gc($maxlifetime);
+    }
+}