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Rollup merge of rust-lang#61818 - tmandry:issue-60709-test, r=cramertj
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Issue rust-lang#60709 test

Adds a test for rust-lang#60709, which was fixed as part of rust-lang#59897.

r? @cramertj
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Centril authored Jun 29, 2019
2 parents 0721364 + b7397cc commit 2238a94
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// edition:2018
// aux-build:arc_wake.rs

#![feature(async_await, await_macro)]

extern crate arc_wake;
#[path = "../auxiliary/arc_wake.rs"]
mod arc_wake;

use std::pin::Pin;
use std::future::Future;
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28 changes: 28 additions & 0 deletions src/test/run-pass/async-await/issue-60709.rs
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// This used to compile the future down to ud2, due to uninhabited types being
// handled incorrectly in generators.
// compile-flags: -Copt-level=z -Cdebuginfo=2 --edition=2018

#![feature(async_await, await_macro)]
#![allow(unused)]

use std::future::Future;
use std::task::Poll;
use std::task::Context;
use std::pin::Pin;
use std::rc::Rc;

struct Never();
impl Future for Never {
type Output = ();
fn poll(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Self::Output> {
Poll::Pending
}
}

fn main() {
let fut = async {
let _rc = Rc::new(()); // Also crashes with Arc
await!(Never());
};
let _bla = fut; // Moving the future is required.
}

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