Expert crashes when working on Elixir itself

[doorgan]

Steps to reproduce:

1. Clone https://github.com/elixir-lang/elixir and open lib/elixir/lib/code/formatter.ex
2. Wait for lexical to report the compilation completed
3. On your terminal, run tail -f .lexical/lexical.log
4. Go back to your editor and try to trigger a completion like Enum|
5. Check the logs, there is an error report:

17:24:01.897 [warning] ** (ArgumentError) could not call Module.get_attribute/2 because the module Code.Formatter is already compiled. Use the Module.__info__/1 callback or Code.fetch_docs/1 instead
    (elixir 1.17.2) lib/module.ex:2350: Module.assert_not_compiled!/3
    (elixir 1.17.2) lib/module.ex:1954: Module.get_attribute/7
    (elixir 1.17.2) lib/kernel.ex:3727: Kernel.do_at/5
    (elixir 1.17.2) expanding macro: Kernel.@/1
    (elixir 1.17.2) nofile:2315: Code.Formatter.binary_operator?/1
    (elixir 1.17.2) expanding macro: Kernel.in/2
    (elixir 1.17.2) nofile:2315: Code.Formatter.binary_operator?/1

[zachallaun]

I'm running into this as well at work. I haven't dug into it yet, but may do so soon – if anyone has any theories, I'd love to hear them!

[jswanner]

I'm not able to reproduce this error using nightly based on https://github.com/elixir-lang/expert/commit/c5cd0fc6d1ab6e85ac3f6943e490ed15171dc682:

[mhanberg]

I think this is more of an editor issue right now. Depending on if the editor supports workspace folders or how it determines the root folder.

[doorgan]

I'm no longer able to reproduce this with the latest main. The logs in the original issue also turned out to be a red herring and not what was crashing expert back then, so I'm closing this.