termbox bug?

termbox_bug.rs

//! ```cargo
//! [dependencies]
//! termbox_simple = "0.2.0"
//! ```

extern crate termbox_simple;
use termbox_simple::Termbox;
use std::sync::{Arc, Mutex};
use std::thread;


// We need to new_server_tab before attempting to draw, or the program instantly exits
fn main() {
    let handle = Arc::new(Mutex::new(Termbox::init().unwrap()));
    let moved_handle = handle.clone();
    thread::spawn(move || {
        // Do something with the handle
        moved_handle.lock().unwrap().clear();
    });
}