Enums do not allow dynamic properties

Author: ondrejmirtes

src/Reflection/ClassReflection.php

@@ -346,6 +346,10 @@ private function collectTraits(ReflectionClass|ReflectionEnum $class): array
 
 	public function allowsDynamicProperties(): bool
 	{
+		if ($this->isEnum()) {
+			return false;
+		}
+
 		if (!$this->phpVersion->deprecatesDynamicProperties()) {
 			return true;
 		}