Ensure property is accessible before checking initialization

vudaltsov · vudaltsov · commit 576126a7eddb · 2019-12-05T15:45:07.000+03:00
diff --git a/src/Symfony/Component/Serializer/Normalizer/PropertyNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/PropertyNormalizer.php
@@ -103,8 +103,14 @@ protected function extractAttributes($object, $format = null, array $context = [
 
         do {
             foreach ($reflectionObject->getProperties() as $property) {
-                if ($checkPropertyInitialization && !$property->isInitialized($object)) {
-                    continue;
+                if ($checkPropertyInitialization) {
+                    if (!$property->isPublic()) {
+                        $property->setAccessible(true);
+                    }
+
+                    if (!$property->isInitialized($object)) {
+                        continue;
+                    }
                 }
 
                 if (!$this->isAllowedAttribute($reflectionObject->getName(), $property->name, $format, $context)) {
