Diagnostic strips leading underscore

[joshlf]

I tried the following code on Rust 1.76.0:

enum _Foo {
    Bar
}

fn main() {
    let _ = Foo::Bar;
}

I got the following error:

error[E0433]: failed to resolve: use of undeclared type `Foo`
 --> src/main.rs:6:13
  |
6 |     let _ = Foo::Bar;
  |             ^^^ use of undeclared type `Foo`
  |
help: an enum with a similar name exists, consider changing it
  |
1 | enum Foo {
  |      ~~~

Note that the suggestion has stripped the leading _ character from the enum's name.

[jieyouxu]

Can confirm this is still present in nightly.

[GuillaumeGomez]

Sounds like fun. Taking a look.

[GuillaumeGomez]

So it is intended this way from what I can see in the source code:

// When the suggested binding change would be from `x` to `_x`, suggest changing the
// original binding definition instead. (#60164)

Improving the wording would be become to clear the confusion though I think.