[VarExporter] fix dumping private properties from abstract classes

src/Symfony/Component/VarExporter/Internal/Exporter.php

@@ -125,7 +125,8 @@ class Exporter
                     $c = 'stdClass';
                 } elseif ('*' === $n[1]) {
                     $n = substr($n, 3);
-                    if ('Error' === $c = $class) {
+                    $c = $reflector->getProperty($n)->class;
+                    if ('Error' === $c) {
                         $c = 'TypeError';
                     } elseif ('Exception' === $c) {
                         $c = 'ErrorException';

src/Symfony/Component/VarExporter/Internal/Hydrator.php

@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\VarExporter\Internal;
 
+use Symfony\Component\VarExporter\Exception\ClassNotFoundException;
+
 /**
  * @author Nicolas Grekas <p@tchwork.com>
  *
@@ -59,7 +61,10 @@ class Hydrator
             };
         }
 
-        $classReflector = Registry::$reflectors[$class] ?? Registry::getClassReflector($class);
+        if (!\class_exists($class) && !\interface_exists($class, false) && !\trait_exists($class, false)) {
+            throw new ClassNotFoundException($class);
+        }
+        $classReflector = new \ReflectionClass($class);
 
         if (!$classReflector->isInternal()) {
             return self::$hydrators[$class] = (self::$hydrators['stdClass'] ?? self::getHydrator('stdClass'))->bindTo(null, $class);

src/Symfony/Component/VarExporter/Tests/Fixtures/abstract-parent.php

@@ -6,10 +6,13 @@ return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
     ],
     null,
     [
-        'Symfony\\Component\\VarExporter\\Tests\\ConcreteClass' => [
+        'Symfony\\Component\\VarExporter\\Tests\\AbstractClass' => [
             'foo' => [
                 123,
             ],
+            'bar' => [
+                234,
+            ],
         ],
     ],
     $o[0],

src/Symfony/Component/VarExporter/Tests/Fixtures/final-error.php

@@ -6,7 +6,7 @@ return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
     ]),
     null,
     [
-        'Symfony\\Component\\VarExporter\\Tests\\FinalError' => [
+        'TypeError' => [
             'file' => [
                 \dirname(__DIR__).\DIRECTORY_SEPARATOR.'VarExporterTest.php',
             ],

src/Symfony/Component/VarExporter/Tests/Fixtures/private.php

@@ -10,17 +10,13 @@ return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
         'Symfony\\Component\\VarExporter\\Tests\\MyPrivateValue' => [
             'prot' => [
                 123,
+                123,
             ],
             'priv' => [
                 234,
                 234,
             ],
         ],
-        'Symfony\\Component\\VarExporter\\Tests\\MyPrivateChildValue' => [
-            'prot' => [
-                1 => 123,
-            ],
-        ],
     ],
     [
         $o[0],

src/Symfony/Component/VarExporter/Tests/VarExporterTest.php

@@ -326,6 +326,12 @@ final class FinalStdClass extends \stdClass
 abstract class AbstractClass
 {
     protected $foo;
+    private $bar;
+
+    protected function setBar($bar)
+    {
+        $this->bar = $bar;
+    }
 }
 
 class ConcreteClass extends AbstractClass
@@ -333,5 +339,6 @@ class ConcreteClass extends AbstractClass
     public function __construct()
     {
         $this->foo = 123;
+        $this->setBar(234);
     }
 }