Command doesn't exit if thread is stuck in blocking I/O

[jethrogb]

This program may not terminate:

use std::{net::TcpListener, sync::mpsc, thread};

fn main() {
    let (tx, rx) = mpsc::channel();
    thread::spawn(move || {
        let listen = TcpListener::bind("0:0").unwrap();
        tx.send(()).unwrap();
        while let Ok(_) = listen.accept() {}
    });
    rx.recv().unwrap();
    println!("Exiting main thread");
}

This is because when the main thread exits, the second thread is likely to be blocking in an accept() call. Therefore, that thread never terminates and the main thread (out of the enclave) is waiting indefinitely for that second thread to finish.

[jethrogb]

I expect this to be fixed alongside #18.

[jethrogb]

Closing since #18 is merged. Ok, @mzohreva ?

[mzohreva]

Yeah, this was fixed in #223