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//@ check-pass
//@ compile-flags: -Zinline-mir -Zvalidate-mir
//@ edition: 2024
// See comment below.
use std::future::Future;
use std::pin::pin;
use std::task::{Context, Waker};
fn call_once<T>(f: impl FnOnce() -> T) -> T { f() }
fn main() {
let x = async || {};
// We first inline `call_once<{async closure}>`.
//
// This gives us a future whose type is the "FnOnce" flavor of the async closure's
// child coroutine. The body of this coroutine is synthetic, which we synthesize in
// the by-move body query.
let fut = pin!(call_once(x));
// We then try to inline that body in this poll call.
//
// The inliner does some inlinability checks; one of these checks involves checking
// the body for the `#[rustc_no_mir_inline]` attribute. Since the synthetic body had
// no HIR synthesized, but it's still a local def id, we end up ICEing in the
// `local_def_id_to_hir_id` call when trying to read its attrs.
fut.poll(&mut Context::from_waker(Waker::noop()));
}
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