Implement Clone for CrosslinkRecord

src/state/crosslink_record.rs

@@ -1,6 +1,7 @@
 use super::utils::types::Sha256Digest;
 use super::rlp::{ RlpStream, Encodable };
 
+#[derive(Copy)]
 pub struct CrosslinkRecord {
     pub epoch: u64,
     pub hash: Sha256Digest
@@ -15,6 +16,10 @@ impl CrosslinkRecord {
     }
 }
 
+impl Clone for CrosslinkRecord {
+    fn clone(&self) -> CrosslinkRecord { *self }
+}
+
 /*
  * RLP Encoding
  */