Just like all the other former resources... we missed this case.
zend_class_entry ce;
INIT_CLASS_ENTRY(ce, "GdImage", class_GdImage_methods);
gd_image_ce = zend_register_internal_class(&ce);
- gd_image_ce->ce_flags |= ZEND_ACC_FINAL;
+ gd_image_ce->ce_flags |= ZEND_ACC_FINAL | ZEND_ACC_NO_DYNAMIC_PROPERTIES;
gd_image_ce->create_object = php_gd_image_object_create;
gd_image_ce->serialize = zend_class_serialize_deny;
gd_image_ce->unserialize = zend_class_unserialize_deny;