Failed example of accessible immutable ref from Iron

gistfile1.rs

extern crate iron;

use iron::prelude::*;
use iron::status;

struct MyObject;

impl MyObject {
    fn foo(&self) {}
}

fn serve(obj: &MyObject) {

    // For simplicity, we're going for a VERY minimal approach here,
    // without any route or anything...
    Iron::new(|_: &mut Request| {
        obj.foo();
        Ok(Response::with((status::Ok, "Hello world!")))
    }).http("localhost:3000").unwrap();
}

fn main() {
    let obj: MyObject;
    serve(&obj);
}