//@ check-pass

use std::thread::Builder;

static GENERATIONS: usize = 1024 + 256 + 128 + 49;

fn spawn(mut f: Box<dyn FnMut() + 'static + Send>) {
    Builder::new().stack_size(32 * 1024).spawn(move || f());
}

fn child_no(x: usize) -> Box<dyn FnMut() + 'static + Send> {
    Box::new(move || {
        if x < GENERATIONS {
            spawn(child_no(x + 1));
        }
    })
}

pub fn main() {
    spawn(child_no(0));
}