use std::{marker::PhantomPinned, pin::Pin};

struct Foo(PhantomPinned);

impl Foo {
    fn new() -> Self {
        Foo(PhantomPinned)
    }

    fn poll(self: Pin<&mut Self>) {
        println!("Polled on {}", std::thread::current().name().unwrap())
    }
}

fn main() {
    let mut foo = Box::pin(Foo::new());
    foo.as_mut().poll();
    std::thread::Builder::new()
        .name("not main".into())
        .spawn(move || foo.as_mut().poll())
        .unwrap()
        .join()
        .unwrap();
}