Add Clone to error

Cargo.toml

@@ -19,4 +19,5 @@ thiserror = "1.0.9"
 yasna = { version = "0.3", features = ["num-bigint"] }
 
 [dev-dependencies]
+anyhow = "1.0"
 rand = "0.7"

examples/generate.rs

@@ -1,11 +1,15 @@
-use failure::Error;
+use anyhow::Error;
 use rsa::RSAPrivateKey;
 use rsa_pem::KeyExt;
 
+#[derive(Clone, Debug, thiserror::Error)]
+#[error("Error generating key")]
+pub struct MyError;
+
 fn main() -> Result<(), Error> {
     let mut rng = rand::thread_rng();
 
-    let key = RSAPrivateKey::new(&mut rng, 2048)?;
+    let key = RSAPrivateKey::new(&mut rng, 2048).map_err(|_| MyError)?;
 
     println!("PKCS1 - Private");
     println!("{}", key.to_pem_pkcs1()?);

src/lib.rs

@@ -1,5 +1,5 @@
-use thiserror::Error;
 use num_bigint_dig::{BigInt, BigUint, Sign};
+use thiserror::Error;
 
 mod private;
 mod public;
@@ -17,7 +17,7 @@ pub trait KeyExt {
         Self: Sized;
 }
 
-#[derive(Debug, Error)]
+#[derive(Clone, Debug, Error)]
 pub enum KeyError {
     #[error("Invalid key kind supplied")]
     Kind,