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

vendor/symfony/http-kernel/Profiler/MemcachedProfilerStorage.php

@@ -0,0 +1,103 @@
+<?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\Profiler;
+
+/**
+ * Memcached Profiler Storage.
+ *
+ * @author Andrej Hudec <pulzarraider@gmail.com>
+ */
+class MemcachedProfilerStorage extends BaseMemcacheProfilerStorage
+{
+    /**
+     * @var \Memcached
+     */
+    private $memcached;
+
+    /**
+     * Internal convenience method that returns the instance of the Memcached.
+     *
+     * @return \Memcached
+     *
+     * @throws \RuntimeException
+     */
+    protected function getMemcached()
+    {
+        if (null === $this->memcached) {
+            if (!preg_match('#^memcached://(?(?=\[.*\])\[(.*)\]|(.*)):(.*)$#', $this->dsn, $matches)) {
+                throw new \RuntimeException(sprintf('Please check your configuration. You are trying to use Memcached with an invalid dsn "%s". The expected format is "memcached://[host]:port".', $this->dsn));
+            }
+
+            $host = $matches[1] ?: $matches[2];
+            $port = $matches[3];
+
+            $memcached = new \Memcached();
+
+            // disable compression to allow appending
+            $memcached->setOption(\Memcached::OPT_COMPRESSION, false);
+
+            $memcached->addServer($host, $port);
+
+            $this->memcached = $memcached;
+        }
+
+        return $this->memcached;
+    }
+
+    /**
+     * Set instance of the Memcached.
+     *
+     * @param \Memcached $memcached
+     */
+    public function setMemcached($memcached)
+    {
+        $this->memcached = $memcached;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function getValue($key)
+    {
+        return $this->getMemcached()->get($key);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function setValue($key, $value, $expiration = 0)
+    {
+        return $this->getMemcached()->set($key, $value, time() + $expiration);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function delete($key)
+    {
+        return $this->getMemcached()->delete($key);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function appendValue($key, $value, $expiration = 0)
+    {
+        $memcached = $this->getMemcached();
+
+        if (!$result = $memcached->append($key, $value)) {
+            return $memcached->set($key, $value, $expiration);
+        }
+
+        return $result;
+    }
+}