#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(hint_must_use)]
struct Error;
macro_rules! make_error {
    ($($args:expr),*) => {
        core::hint::must_use({ let error = make_error(core::format_args!($($args),*));
        error })
    };
}
fn make_error(args: core::fmt::Arguments<'_>) -> Error {
    Error
}
async fn f() {
    log(make_error!("look: {:p}", unsync())).await;
}
async fn log(error: Error) {}
fn unsync() -> *const () {
    0 as *const ()
}
fn test() {
    fn assert_send(_: impl Send) {}
    assert_send(f());
}
fn main() {}