test.rs

use std::io;
use std::io::Write;

fn main() {
    let output = &"hello";
    loop {
        match write!(&mut io::stdout(), "{}\n", output) {
            Ok(_) => {},
            Err(e) => {
                if e.kind() == io::ErrorKind::BrokenPipe {
                    write!(&mut io::stderr(), "breaking\n").unwrap();
                    break
                } else {
                    panic!("My {}", e)
                }
            },
        }
    }
    write!(&mut io::stderr(), "got out of the loop alive\n").unwrap();
}