Nested endpoints have less priority than wildcards

[fawni]

using a wildcard path is the only way to handle 404 errors in tide as far as i'm aware. however, tide ignores nested endpoints and treats them like undefined paths.

here's an example:

#[async_std::main]
async fn main() -> Result<(), tide::Error> {
    let mut app = tide::new();
    app.at("/hello").get(|_| async move { Ok("hello") });
    app.at("/orders").nest({
        let mut orders = tide::new();
        orders.at("/shoes").get(|_| async move { Ok("shoes") });
        orders.at("/shirts").get(|_| async move { Ok("shirts") });
        orders
    });
    app.at("*").get(|_| async move { Ok("404") });
    async_std::task::spawn(app.listen("0.0.0.0:8080"));

    assert_eq!(surf::get("http://localhost:8080/hello").recv_string().await?, "hello");
    assert_eq!(surf::get("http://localhost:8080/orders/shoes").recv_string().await?, "shoes");
    Ok(())
}

which returns:

thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `"404"`,
 right: `"shoes"`', src\main.rs:15:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

using tide version 0.16.0 at the time of writing this.

/orders/shoes is handled and should return "shoes" but instead it is ignored and returns "404". this is not the case with non nested routes such as /hello in the example.