cairo: errors: derive Error from common enum traits
@@ -6,7 +6,7 @@ use std::fmt::Debug;
use std::io;
use thiserror::Error;
-#[derive(Error, Debug)]
+#[derive(Error, Debug, Clone, PartialEq, PartialOrd, Copy, Eq)]
#[non_exhaustive]
pub enum Error {
#[error("No Memory")]
