gistfile1.txt

#[macro_use]
extern crate serde_derive;

use serde::{Serialize, Deserialize};
use std::io::{Cursor, Seek, SeekFrom};
use rmp_serde::{
    Serializer, Deserializer
};

#[derive(Serialize, Deserialize, PartialEq, Eq, Debug, Clone)]
enum MetaData {
    Mir,
}

fn main() {
    let buf: Vec<u8> = Vec::new();
    let mut curs = Cursor::new(buf);

    let mut ser = Serializer::new(&mut curs);

    let to_ser: Option<MetaData> = Some(MetaData::Mir);
    //let to_ser: MetaData = MetaData::Mir;
    to_ser.serialize(&mut ser).unwrap();

    curs.seek(SeekFrom::Start(0)).unwrap();

    let mut deser = Deserializer::new(&mut curs);
    println!("DECODE");
    let res = Option::<MetaData>::deserialize(&mut deser).unwrap();
    //let res = MetaData:deserialize(&mut deser).unwrap();
    println!("DECODE");

    println!("{:?}", res);
}

gistfile2.txt

     Running `target/debug/rmp_test`
DECODE
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: TypeMismatch(FixPos(0))', libcore/result.rs:1009:5