let serial = serde_json::to_string(&a).unwrap();
  let mut f = BufWriter::new(File::create("/tmp/foo.bar").unwrap());
  serialize_into(&mut f, &a).unwrap();

  let f = File::open("/tmp/foo.bar").unwrap();
  let mut rdr = BufReader::new(f);
  let decoded: ndarray::ArrayBase<ndarray::OwnedRepr<f32>, ndarray::Dim<[usize; 1]>> = 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