Merge branch 'backport/fix/l2c-version' into 2.6

Backporting https://github.com/doctrine/doctrine2/pull/7069

lib/Doctrine/ORM/Cache/DefaultEntityHydrator.php

@@ -75,6 +75,10 @@ class DefaultEntityHydrator implements EntityHydrator
         $data = $this->uow->getOriginalEntityData($entity);
         $data = array_merge($data, $metadata->getIdentifierValues($entity)); // why update has no identifier values ?
 
+        if ($metadata->isVersioned) {
+            $data[$metadata->versionField] = $metadata->getFieldValue($entity, $metadata->versionField);
+        }
+
         foreach ($metadata->associationMappings as $name => $assoc) {
             if ( ! isset($data[$name])) {
                 continue;

tests/Doctrine/Tests/ORM/Functional/Ticket/GH7067Test.php

@@ -0,0 +1,69 @@
+<?php
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket;
+
+final class GH7067Test extends \Doctrine\Tests\OrmFunctionalTestCase
+{
+    public function setUp() : void
+    {
+        $this->enableSecondLevelCache();
+        parent::setUp();
+
+        $this->setUpEntitySchema([GH7067Entity::class]);
+    }
+
+    /**
+     * @group 7067
+     */
+    public function testSLCWithVersion() : void
+    {
+        $entity             = new GH7067Entity();
+        $entity->lastUpdate = new \DateTime();
+
+        $this->_em->persist($entity);
+        $this->_em->flush();
+        $this->_em->clear();
+
+        /** @var GH7067Entity $notCached */
+        $notCached = $this->_em->find(GH7067Entity::class, $entity->id);
+
+        self::assertNotNull($notCached->version, 'Version already cached by persister above, it must be not null');
+
+        $notCached->lastUpdate = new \DateTime();
+
+        $this->_em->flush();
+        $this->_em->clear();
+    }
+}
+
+/**
+ * @Entity()
+ * @Cache(usage="NONSTRICT_READ_WRITE")
+ */
+class GH7067Entity
+{
+    /**
+     * @Id
+     * @GeneratedValue
+     * @Column(type="integer")
+     *
+     * @var int
+     */
+    public $id;
+
+    /**
+     * @Column(type="datetime")
+     *
+     * @var \DateTime
+     */
+    public $lastUpdate;
+
+    /**
+     * @Column(type="datetime")
+     * @Version
+     *
+     * @var \DateTime
+     */
+    public $version;
+}