[PHP8.4]private(set) properties should be skipped to avoid resetting values

src/Proxy/ProxyFactory.php

@@ -43,8 +43,10 @@
 use function strtr;
 use function substr;
 use function ucfirst;
+use function version_compare;
 
 use const DIRECTORY_SEPARATOR;
+use const PHP_VERSION;
 
 /**
  * This factory is used to create proxy objects for entities at runtime.
@@ -263,7 +265,11 @@ private function getProxyFactory(string $className): Closure
                 $name = $property->name;
 
                 if ($property->isStatic() || (($class->hasField($name) || $class->hasAssociation($name)) && ! isset($identifiers[$name]))) {
-                    continue;
+                    if (version_compare(PHP_VERSION, '8.4', '<')) {
+                        continue;
+                    } elseif ($property->isPrivateSet() === false) {
+                        continue;
+                    }
                 }
 
                 $prefix = $property->isPrivate() ? "\0" . $property->class . "\0" : ($property->isProtected() ? "\0*\0" : '');

tests/Tests/ORM/Functional/Ticket/DDC11871/DDC11871Order.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket\DDC11871;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+#[ORM\Table(name: 'DDC11871_Order')]
+class DDC11871Order
+{
+    #[ORM\Id]
+    #[ORM\Column(type: 'integer')]
+    #[ORM\GeneratedValue(strategy: 'AUTO')]
+    public int $id;
+
+    #[ORM\Column]
+    private(set) string $company;
+
+    public function __construct(
+        #[ORM\ManyToOne(targetEntity: DDC11871User::class, fetch: 'LAZY')]
+        private(set) DDC11871User $user,
+    ) {
+        $this->company = $user->company;
+    }
+}

tests/Tests/ORM/Functional/Ticket/DDC11871/DDC11871Test.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket\DDC11871;
+
+use Doctrine\Tests\OrmFunctionalTestCase;
+
+use const PHP_VERSION_ID;
+
+class DDC11871Test extends OrmFunctionalTestCase
+{
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        if (PHP_VERSION_ID < 80400) {
+            self::markTestSkipped('The ' . self::class . ' requires PHP 8.4.');
+        }
+
+        $this->setUpEntitySchema([
+            DDC11871User::class,
+            DDC11871Order::class,
+        ]);
+    }
+
+    public function testEntityHydratation(): void
+    {
+        $user = new DDC11871User('Some company');
+        $this->_em->persist($user);
+        $order = new DDC11871Order($user);
+        $this->_em->persist($order);
+        $this->_em->flush();
+        $this->_em->clear();
+
+        $hydrated = $this->_em->getRepository(DDC11871Order::class)->findAll();
+        self::assertCount(1, $hydrated);
+    }
+}

tests/Tests/ORM/Functional/Ticket/DDC11871/DDC11871User.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket\DDC11871;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+#[ORM\Table(name: 'DDC11871_User')]
+class DDC11871User
+{
+    #[ORM\Id]
+    #[ORM\Column(type: 'integer')]
+    #[ORM\GeneratedValue(strategy: 'AUTO')]
+    public int $id;
+
+    #[ORM\Column(type: 'string')]
+    private(set) string $company;
+
+    public function __construct(string $company)
+    {
+        $this->company = $company;
+    }
+}