Deserialization failure results in panic

[WiSaGaN]

I expect de-serialization failure will result in returning error, but it seems not the case for program below:

#[macro_use]
extern crate serde;
extern crate serde_yaml;

#[derive(Deserialize)]
#[derive(Debug)]
pub struct Foo {
    pub foo: [(); 1],
}

fn main() {
    let result: serde_yaml::Result<Foo> = serde_yaml::from_str("foo:\n");
    println!("{:?}", result);
}

Running this using stable 1.28.0 will result in

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Message("invalid type: unit value, expected an array of length 1", None)', libcore/result.rs:945:5
note: Run with `RUST_BACKTRACE=1` for a backtrace.

It appears this is the offending line.

[dtolnay]

Thanks! Fixed in 0.8.3.