[Cache] forbid serializing AbstractAdapter and TagAwareAdapter instances

src/Symfony/Component/Cache/Adapter/AbstractAdapter.php

@@ -277,6 +277,16 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
         return $ok;
     }
 
+    public function __sleep()
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
     public function __destruct()
     {
         if ($this->deferred) {

src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php

@@ -277,6 +277,16 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
         return $this->invalidateTags([]);
     }
 
+    public function __sleep()
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
     public function __destruct()
     {
         $this->commit();