let a = Array::from_vec(vec![0.1, 0.2]);
  let mut w = BufWriter::new(File::create("/tmp/foo.bar").unwrap());
  serialize_into(&mut w, &a).unwrap();

  let f = File::open("/tmp/foo.bar").unwrap();
  let mut rdr = BufReader::new(f);
  let decoded_a: ndarray::Array1<f32> = deserialize_from(&mut rdr).unwrap();

// thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Io(Custom { kind: UnexpectedEof, error: StringError("failed to fill whole buffer") })', src/libcore/result.rs:997:5