LSP crashes

[kape1395]

Version - Engine available at: /home/karolis/.cache/expert/0.1.0-rc.6-1bbd0df/ex-1.19.5-erl-16.2.1/

2026-03-30 15:10:31.804 [info] [Error - 3:10:31 PM] Request textDocument/codeAction failed.
2026-03-30 15:10:31.804 [info]   Message: ** (FunctionClauseError) no function clause matching in XPExpert.Protocol.Conversions.to_elixir/2
    (xp_expert 0.1.0-rc.6-1bbd0df) lib/expert/protocol/conversions.ex:21: XPExpert.Protocol.Conversions.to_elixir(%XPGenLSP.Structures.Range{end: %XPGenLSP.Structures.Position{character: 51, line: 4}, start: %XPGenLSP.Structures.Position{character: 51, line: 4}}, nil)
    (xp_forge 0.1.0-rc.6-1bbd0df) lib/forge/protocol/convertible.ex:52: anonymous fn/4 in XPForge.Protocol.Convertible.Helpers.apply/3
    (elixir 1.17.3) lib/enum.ex:4858: Enumerable.List.reduce/3
    (elixir 1.17.3) lib/enum.ex:2585: Enum.reduce_while/3
    (xp_forge 0.1.0-rc.6-1bbd0df) lib/forge/protocol/convertible.ex:182: XPForge.Protocol.Convertible.Any.to_native/2
    (xp_expert 0.1.0-rc.6-1bbd0df) lib/expert/protocol/convert.ex:26: XPExpert.Protocol.Convert.to_native/1
    (xp_expert 0.1.0-rc.6-1bbd0df) lib/expert.ex:116: XPExpert.handle_request/2
    (xp_gen_lsp 0.11.3) lib/gen_lsp.ex:390: anonymous fn/2 in XPGenLSP.loop/3

  Code: -32603 

I'm not sure what triggers it.

[Draggu]

Probably there was a raise in engine node, could you share the code that triggered it? Minimal repro would be welcome.

[kape1395]

That's hard to do. I can't share the current code, and I don't understand what actually triggers it, thus hard to make a minimal example.

[katafrakt]

Similar error was reported before in #274 and #245 - it happened when a file was renamed. Is that something you perhaps did before the crash?

[kape1395]

I have restarted VSCode many times after the last rename I did, and removed the .expert folder.
Right before the crash, I just edited a file, I think around the alias part.
I'll try to provide more details if that repeats. Somehow, either it fails with this frequently, or it becomes hard to provoke at all. I was hoping maybe the stacktrace would help.