From 447baacbadc7c233bb5f6eeb1d3aa4a56dba512d Mon Sep 17 00:00:00 2001
From: Raito Akehanareru <raito.akehanareru@gmail.com>
Date: Fri, 30 Nov 2018 13:50:43 +0100
Subject: [PATCH] [Cache] Fixed Memcached adapter doClear()to call flush()

---
 .../Component/Cache/Tests/Adapter/MemcachedAdapterTest.php   | 5 +++++
 src/Symfony/Component/Cache/Traits/MemcachedTrait.php        | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php
index 59d28a33c1be..1f2f4d40acfa 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php
@@ -192,4 +192,9 @@ public function provideDsnWithOptions()
             array(\Memcached::OPT_SOCKET_RECV_SIZE => 1, \Memcached::OPT_SOCKET_SEND_SIZE => 2, \Memcached::OPT_RETRY_TIMEOUT => 8),
         );
     }
+
+    public function testClear()
+    {
+        $this->assertTrue($this->createCachePool()->clear());
+    }
 }
diff --git a/src/Symfony/Component/Cache/Traits/MemcachedTrait.php b/src/Symfony/Component/Cache/Traits/MemcachedTrait.php
index cf04f1cf8566..8160f1411616 100644
--- a/src/Symfony/Component/Cache/Traits/MemcachedTrait.php
+++ b/src/Symfony/Component/Cache/Traits/MemcachedTrait.php
@@ -260,7 +260,7 @@ protected function doDelete(array $ids)
      */
     protected function doClear($namespace)
     {
-        return false;
+        return '' === $namespace && $this->getClient()->flush();
     }
 
     private function checkResultCode($result)