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