blob: 937723ca743e9dd2f7c2036888a3b0a93492ac51 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
// Checks that we don't get conflicting arguments in our debug info with a particular async function
// structure.
// edition:2021
// compile-flags: -Cdebuginfo=2
// build-pass
#![crate_type = "lib"]
use std::future::Future;
// The compiler produces a closure as part of this function. That closure initially takes an
// argument _task_context. Later, when the MIR for that closure is transformed into a generator
// state machine, _task_context is demoted to not be an argument, but just part of an unnamed
// argument. If we emit debug info saying that both _task_context and the unnamed argument are both
// argument number 2, then LLVM will fail with "conflicting debug info for argument". See
// https://github.com/rust-lang/rust/pull/109466#issuecomment-1500879195 for details.
async fn recv_unit() {
std::future::ready(()).await;
}
pub fn poll_recv() {
// This box is necessary in order to reproduce the problem.
let _: Box<dyn Future<Output = ()>> = Box::new(recv_unit());
}
|
