| error[E0277]: `?` couldn't convert the error to `()` |
| --> $DIR/issue-32709.rs:4:11 |
| | |
| LL | fn a() -> Result<i32, ()> { |
| | --------------- expected `()` because of this |
| LL | Err(5)?; |
| | ^ the trait `std::convert::From<{integer}>` is not implemented for `()` |
| | |
| = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait |
| = note: required by `std::convert::From::from` |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0277`. |
