Merge branch '6.4' into 7.0

* 6.4:
  Safeguard dynamic access to Doctrine metadata properties
  Enhance error handling in StaticPrefixCollection for compatibility with libpcre2-10.43

Author: derrabus

Form/DoctrineOrmTypeGuesser.php

@@ -195,7 +195,7 @@ private static function getRealClass(string $class): string
     private static function getMappingValue(array|JoinColumnMapping $mapping, string $key): mixed
     {
         if ($mapping instanceof JoinColumnMapping) {
-            return $mapping->$key;
+            return $mapping->$key ?? null;
         }
 
         return $mapping[$key] ?? null;

PropertyInfo/DoctrineExtractor.php

@@ -279,7 +279,7 @@ private function getPhpType(string $doctrineType): ?string
     private static function getMappingValue(array|AssociationMapping|EmbeddedClassMapping|FieldMapping|JoinColumnMapping $mapping, string $key): mixed
     {
         if ($mapping instanceof AssociationMapping || $mapping instanceof EmbeddedClassMapping || $mapping instanceof FieldMapping || $mapping instanceof JoinColumnMapping) {
-            return $mapping->$key;
+            return $mapping->$key ?? null;
         }
 
         return $mapping[$key] ?? null;

Validator/DoctrineLoader.php

@@ -137,7 +137,7 @@ private function getExistingUniqueFields(ClassMetadata $metadata): array
     private static function getFieldMappingValue(array|FieldMapping $mapping, string $key): mixed
     {
         if ($mapping instanceof FieldMapping) {
-            return $mapping->$key;
+            return $mapping->$key ?? null;
         }
 
         return $mapping[$key] ?? null;