[HttpKernel] Fix datacollector caster for reference object property

DataCollector/DataCollector.php

@@ -70,9 +70,21 @@ abstract class DataCollector implements DataCollectorInterface
         $casters = [
             '*' => function ($v, array $a, Stub $s, $isNested) {
                 if (!$v instanceof Stub) {
+                    $b = $a;
                     foreach ($a as $k => $v) {
-                        if (\is_object($v) && !$v instanceof \DateTimeInterface && !$v instanceof Stub) {
-                            $a[$k] = new CutStub($v);
+                        if (!\is_object($v) || $v instanceof \DateTimeInterface || $v instanceof Stub) {
+                            continue;
+                        }
+
+                        try {
+                            $a[$k] = $s = new CutStub($v);
+
+                            if ($b[$k] === $s) {
+                                // we've hit a non-typed reference
+                                $a[$k] = $v;
+                            }
+                        } catch (\TypeError $e) {
+                            // we've hit a typed reference
                         }
                     }
                 }

Tests/DataCollector/DataCollectorTest.php

@@ -15,6 +15,8 @@ use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Tests\Fixtures\DataCollector\CloneVarDataCollector;
+use Symfony\Component\HttpKernel\Tests\Fixtures\UsePropertyInDestruct;
+use Symfony\Component\HttpKernel\Tests\Fixtures\WithPublicObjectProperty;
 use Symfony\Component\VarDumper\Cloner\VarCloner;
 
 class DataCollectorTest extends TestCase
@@ -35,4 +37,68 @@ class DataCollectorTest extends TestCase
 
         $this->assertSame($filePath, $c->getData()[0]);
     }
+
+    /**
+     * @requires PHP 8
+     */
+    public function testClassPublicObjectProperty()
+    {
+        $parent = new WithPublicObjectProperty();
+        $child = new WithPublicObjectProperty();
+
+        $child->parent = $parent;
+
+        $c = new CloneVarDataCollector($child);
+        $c->collect(new Request(), new Response());
+
+        $this->assertNotNull($c->getData()->parent);
+    }
+
+    /**
+     * @requires PHP 8
+     */
+    public function testClassPublicObjectPropertyAsReference()
+    {
+        $parent = new WithPublicObjectProperty();
+        $child = new WithPublicObjectProperty();
+
+        $child->parent = &$parent;
+
+        $c = new CloneVarDataCollector($child);
+        $c->collect(new Request(), new Response());
+
+        $this->assertNotNull($c->getData()->parent);
+    }
+
+    /**
+     * @requires PHP 8
+     */
+    public function testClassUsePropertyInDestruct()
+    {
+        $parent = new UsePropertyInDestruct();
+        $child = new UsePropertyInDestruct();
+
+        $child->parent = $parent;
+
+        $c = new CloneVarDataCollector($child);
+        $c->collect(new Request(), new Response());
+
+        $this->assertNotNull($c->getData()->parent);
+    }
+
+    /**
+     * @requires PHP 8
+     */
+    public function testClassUsePropertyAsReferenceInDestruct()
+    {
+        $parent = new UsePropertyInDestruct();
+        $child = new UsePropertyInDestruct();
+
+        $child->parent = &$parent;
+
+        $c = new CloneVarDataCollector($child);
+        $c->collect(new Request(), new Response());
+
+        $this->assertNotNull($c->getData()->parent);
+    }
 }

Tests/Fixtures/UsePropertyInDestruct.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Symfony\Component\HttpKernel\Tests\Fixtures;
+
+class UsePropertyInDestruct
+{
+    public string $name;
+    public $parent = null;
+
+    public function __destruct()
+    {
+        if ($this->parent !== null) {
+            $this->parent->name = '';
+        }
+    }
+}

Tests/Fixtures/WithPublicObjectProperty.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace Symfony\Component\HttpKernel\Tests\Fixtures;
+
+class WithPublicObjectProperty
+{
+    public ?WithPublicObjectProperty $parent = null;
+}