#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(local_waker)]
use std::task::{ContextBuilder, LocalWaker, Waker, Poll};
use std::future::Future;
fn main() {
    let local_waker = LocalWaker::noop();
    let waker = Waker::noop();
    let mut cx = ContextBuilder::from_waker(&waker).local_waker(&local_waker).build();
    let mut future = std::pin::pin!(async { 20 });
    let poll = future.as_mut().poll(&mut cx);
    assert_eq!(poll, Poll::Ready(20));
}