|  | error: functions cannot be both `async` and C-variadic | 
|  | --> $DIR/note-and-explain-ReVar-124973.rs:5:1 | 
|  | | | 
|  | LL | async unsafe extern "C" fn multiple_named_lifetimes<'a, 'b>(_: u8, ...) {} | 
|  | | ^^^^^ `async` because of this                                      ^^^ C-variadic because of this | 
|  |  | 
|  | error[E0700]: hidden type for `impl Future<Output = ()>` captures lifetime that does not appear in bounds | 
|  | --> $DIR/note-and-explain-ReVar-124973.rs:5:73 | 
|  | | | 
|  | LL | async unsafe extern "C" fn multiple_named_lifetimes<'a, 'b>(_: u8, ...) {} | 
|  | | ----------------------------------------------------------------------- ^^ | 
|  | | | | 
|  | | opaque type defined here | 
|  | | | 
|  | = note: hidden type `{async fn body of multiple_named_lifetimes<'a, 'b>()}` captures lifetime `'_` | 
|  |  | 
|  | error: aborting due to 2 previous errors | 
|  |  | 
|  | For more information about this error, try `rustc --explain E0700`. |