[ER] Help for unresolved super::X imports too.

[leonardo-m]

This code:

mod foo {
    use super::NonZeroU8;

    pub(crate) fn bar() -> NonZeroU8 {
        NonZeroU8::new(1).unwrap()
    }
}

use foo::bar;

fn main() {
    let y = NonZeroU8::new(2).unwrap();
}

Trying to compile it with rustc (1.54.0-nightly 5c02926 2021-05-11), it gives:

error[E0432]: unresolved import `super::NonZeroU8`
 --> ...\test.rs:2:9
  |
2 |     use super::NonZeroU8;
  |         ^^^^^^^^^^^^^^^^ no `NonZeroU8` in the root

error[E0433]: failed to resolve: use of undeclared type `NonZeroU8`
  --> ...\test.rs:12:13
   |
12 |     let y = NonZeroU8::new(2).unwrap();
   |             ^^^^^^^^^ not found in this scope
   |
help: consider importing one of these items
   |
9  | use core::num::NonZeroU8;
   |
9  | use std::num::NonZeroU8;
   |

I'd like to see the 'use std::num::NonZeroU8;' help for the first unresolved import in the module too.

[TaKO8Ki]

I think this problem was solved in #89224.

[leonardo-m]

I think this problem was solved in #89224.

I'll take a look in the next Nightly.

[leonardo-m]

89224 doesn't solve the problem of this ER:

error[E0432]: unresolved import `super::NonZeroU8`
 --> ...\test.rs:2:9
  |
2 |     use super::NonZeroU8;
  |         ^^^^^^^^^^^^^^^^^ no `NonZeroU8` in the root

error[E0433]: failed to resolve: use of undeclared type `NonZeroU8`
  --> ...\test.rs:12:13
   |
12 |     let y = NonZeroU8::new(2).unwrap();
   |             ^^^^^^^^^ not found in this scope
   |
help: consider importing one of these items
   |
9  | use std::num::NonZeroU8;
   |
9  | use core::num::NonZeroU8;
   |