Thanks for pointing that out, it's a useful feature, but that doesn't get around the paywall here.
53 karma · joined June 6, 2016
TcpListener::bind(&addr, &handle).unwrap()
Rather than raising exceptions, the paradigm in Rust is to return a Response item, which has an Ok and an Err subtype. unwrap() here assumes that the response is Ok and just gives that back the data returned, or crashes if its an error.