Url::as_str() cannot be parsed back into Url

[e00E]

While fuzzing with #660 I discovered this failing input

#[test]
fn fuzzer_error() {
    let parsed = Url::parse("h:/./\r/:").unwrap();
    dbg!(&parsed);
    /*
    Url {
        scheme: "h",
        host: None,
        port: None,
        path: "//:",
        query: None,
        fragment: None,
        username: "",
        password: None,
    }
    */
    let as_str = parsed.as_str();
    dbg!(as_str);
    // "h://:"

    // Err(ParseError::EmptyHost)
    let parsed_again = Url::parse(as_str).unwrap();
    assert_eq!(parsed, parsed_again);
}

[qsantos]

It looks like this was resolved by #817.

[valenting]

Thanks, @qsantos !