rls no longer builds after rust-lang/rust#98975

[rust-highfive]

Hello, this is your friendly neighborhood mergebot.
After merging PR #98975, I observed that the tool rls no longer builds.
A follow-up PR to the repository https://github.com/rust-lang/rls is needed to fix the fallout.

cc @jyn514, do you think you would have time to do the follow-up work?
If so, that would be great!

[jyn514]

Yes, I think I'll have time to fix this today.

[jyn514]

I think there are other changes that need to happen first. I tried to compile with tonight's nightly and got lots of errors from rustfmt:

error[E0532]: expected unit struct, unit variant or constant, found tuple variant `ast::Extern::Implicit`
   --> /home/jnelson/.local/lib/cargo/git/checkouts/rustfmt-c4b65366788d3254/5fa2727/src/utils.rs:141:9
    |
141 |         ast::Extern::Implicit => "C".to_owned(),
    |         ^^^^^^^^^^^^^^^^^^^^^

@Xanewok do you know what could be going wrong? do I need to update rustfmt or something like that?

[Xanewok]

I pushed the latest update at rust-lang/rls@ac4648b. @jyn514 is the failure above from the x.py test build here or in the RLS repo?

Rustfmt should be vendored here and should work as expected IIUC.

[jyn514]

@Xanewok that's in the RLS repo.