#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::future::Future;
use std::task;
fn main() {
    let mut cx = task::Context::from_waker(task::Waker::noop());
    let mut future = Box::pin(async { 10 });
    assert_eq!(future.as_mut().poll(& mut cx), task::Poll::Ready(10));
}