| //@ edition: 2021 | |
| #![feature(c_variadic)] | |
| #![crate_type = "lib"] | |
| async unsafe extern "C" fn cannot_be_async(x: isize, ...) {} | |
| //~^ ERROR functions cannot be both `async` and C-variadic | |
| //~| ERROR hidden type for `impl Future<Output = ()>` captures lifetime that does not appear in bounds |