`rls` no longer builds after rust-lang/rust#91539

[rust-highfive]

Hello, this is your friendly neighborhood mergebot.
After merging PR #91539, 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 @matthiaskrgr, do you think you would have time to do the follow-up work?
If so, that would be great!

[matthiaskrgr]

This might be due to #91355
rustc-ap-rustc_span v722.0.0 no longer builds:

error[E0635]: unknown feature `thread_local_const_init`
  --> /home/matthias/.cargo/registry/src/github.com-1ecc6299db9ec823/rustc-ap-rustc_span-722.0.0/src/lib.rs:23:12
   |
23 | #![feature(thread_local_const_init)]
   |            ^^^^^^^^^^^^^^^^^^^^^^^

We need a new version I think.
The last published version of https://crates.io/crates/rustc-ap-rustc_span is 5 months old already 🤔
@alexcrichton Can you please check why there are no new rustc-ap versions being published?

[calebcartwright]

alexcrichton Can you please check why there are no new rustc-ap versions being published?

https://github.com/alexcrichton/rustc-auto-publish/actions/workflows/main.yml

This scheduled workflow is disabled because there hasn't been activity in this repository for at least 60 days. Enable this workflow to resume scheduled runs.

TIL scheduled GitHub Action Workflows apparently require regular activity in the repository to keep going 👀

[alexcrichton]

I didn't realize anyone was still using those crates so I disabled the action, I believe it was broken anyway. Does rustfmt and/or other crates still use those crates.io packages? If so I can try to find time to restart the action.

[flip1995]

Racer still uses those crates. And RLS depends on Racer. So without those crates compiling racer with the latest nightly isn't possible, which makes compiling RLS impossible and therefore blocks the sync of RLS back to rust-lang/rust.

[flip1995]

Would it maybe be an option to make racer depend on rustc-dev to compile instead of publishing AP crates?