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Hyper client guide does not compile #1296

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@FGRibreau

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@FGRibreau
[dependencies]
hyper = "0.11"
futures = "0.1"
tokio-core = "0.1"
tokio-io = "0.1"
extern crate futures;
extern crate hyper;
extern crate tokio_core;

use std::io::{self, Write};
use futures::{Future, Stream};
use hyper::Client;
use tokio_core::reactor::Core;

fn main(){
let mut core = Core::new()?;
let client = Client::new(&core.handle());

let uri = "http://httpbin.org/ip".parse()?;
let work = client.get(uri).and_then(|res| {
    println!("Response: {}", res.status());

    res.body().for_each(|chunk| {
        io::stdout()
            .write_all(&chunk)
            .map_err(From::from)
    })
});
core.run(work)?;
}
error[E0277]: the trait bound `(): std::ops::Try` is not satisfied
  --> src/main.rs:11:16
   |
11 | let mut core = Core::new()?;
   |                ------------
   |                |
   |                the trait `std::ops::Try` is not implemented for `()`
   |                in this macro invocation
   |
   = note: required by `std::ops::Try::from_error`

error[E0277]: the trait bound `(): std::ops::Try` is not satisfied
  --> src/main.rs:14:11
   |
14 | let uri = "http://httpbin.org/ip".parse()?;
   |           --------------------------------
   |           |
   |           the trait `std::ops::Try` is not implemented for `()`
   |           in this macro invocation
   |
   = note: required by `std::ops::Try::from_error`

error[E0277]: the trait bound `(): std::ops::Try` is not satisfied
  --> src/main.rs:24:1
   |
24 | core.run(work)?;
   | ---------------
   | |
   | the trait `std::ops::Try` is not implemented for `()`
   | in this macro invocation
   |
   = note: required by `std::ops::Try::from_error`

error: aborting due to previous error(s)

I had to wrap the code between fn main() {} don't know if it's a documentation typo or not. It seems to not compile, what am I missing?

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