Code shared from the Rust Playground

playground.rs

#![feature(unwind_attributes)]
use std::os::unix::thread::JoinHandleExt;
use libc::pthread_cancel;

struct DropGuard;
impl Drop for DropGuard {
    fn drop(&mut self) {
        println!("unwinding foo");
    }
}

fn foo() {
    let _x = DropGuard;
    loop {
        println!(".");
    }
}
fn main() {
    let handle = std::thread::spawn(foo);
    std::thread::sleep(std::time::Duration::new(0, 10));
    unsafe { 
        pthread_cancel(handle.as_pthread_t());
    }
}