Importing a private function with a wildcard should have a better error

Code

// src/lib.rs
fn calculate() -> usize {
    1 + 2
}

// tests/file.rs
use temp::*;

#[test]
fn tmp() {
    assert_eq!(calculate(), 3);
}

Current output

warning: unused import: `temp::*`
 --> tests/file.rs:1:5
  |
1 | use temp::*;
  |     ^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

error[E0425]: cannot find function `calculate` in this scope
 --> tests/file.rs:5:16
  |
5 |     assert_eq!(calculate(), 3);
  |                ^^^^^^^^^ not found in this scope

Desired output

warning: unused import: `temp::*`
 --> tests/file.rs:1:5
  |
1 | use temp::*;
  |     ^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

error[E0603]: function `calculate` is private and not accessible via `use temp::*`
 --> tests/file.rs:5:16
  |
1 | use temp::*;
  |     ------- wildcard import excludes private items: `calculate`
...
5 |     assert_eq!(calculate(), 3);
  |                ^^^^^^^^^ function `calculate` is private
  |
note: the function `calculate` is defined here
 --> src/lib.rs:1:1
  |
1 | fn calculate() -> usize {
  | ^^^^^^^^^^^^^^^^^^^^^^^

Rationale and extra context

With the original error, it takes a moment to put two and two together and realize that the calculate function is not imported because it is declared private. It might be nice to follow error E0603's footsteps to make the intended message significantly clearer.

For reference, E0603 looks like:

error[E0603]: function `calculate` is private
 --> tests/file.rs:1:11
  |
1 | use temp::calculate;
  |           ^^^^^^^^^ private function
  |
note: the function `calculate` is defined here
 --> src/lib.rs:1:1
  |
1 | fn calculate() -> usize {
  | ^^^^^^^^^^^^^^^^^^^^^^^

Rust Version

rustc 1.90.0-nightly (ba7e63b63 2025-07-29)
binary: rustc
commit-hash: ba7e63b63871a429533c189adbfb1d9a6337e000
commit-date: 2025-07-29
host: x86_64-unknown-linux-gnu
release: 1.90.0-nightly
LLVM version: 20.1.8

Anything else?

No response

Run the reproduction using src/lib.rs and tests/file.rs, then compare the current and desired diagnostics. Trace the compiler path for wildcard imports and private-item resolution, using the E0603 diagnostic as the reference. Done means the reproduction reports E0603 with the private function and its definition location.