Uiua LSP only partially works

[mi2ebi]

Summary

Formatting and autocomplete work, but syntax highlighting and diagnostics don't. I assume this is a Helix problem because everything works fine in e.g. VS Code.

https://github.com/shnarazk/tree-sitter-uiua exists but is likely outdated

Reproduction Steps

I tried this:

1. cd Documents/uiuatest; hx main.ua
2. enter insert mode
3. F = back(/*+ran) 1, newline, F
4. exit insert mode, :w

I expected this to happen:

• format (the first line to F ← ˜(/×+⇡)1)
• highlight
• diagnostics (the call to F without an argument is invalid; running uiua run produces this:

Error: Stack was empty when getting argument 2
  at main.ua:1:5
1 | F ← ˜(/×+⇡)1
        ─
  in F at main.ua:2:1

)

Instead, this happened: only format

Helix log

~/.cache/helix/helix.log

2025-05-26T20:56:23.073 helix_lsp::util [WARN] LSP position Position { line: 4294967295, character: 4294967295 } out of range assuming EOF
2025-05-26T20:58:23.518 helix_lsp::util [WARN] LSP position Position { line: 4294967295, character: 4294967295 } out of range assuming EOF

Platform

fedora 42 kde

Terminal Emulator

konsole

Installation Method

dnf

Helix Version

helix 25.01.1 (e7ac2fc)

[mi2ebi]

Relevant config:

[[language]]
name = "uiua"
scope = "source.uiua"
file-types = ["ua"]
language-servers = ["uiua-lsp"]
auto-format = true

[language-server.uiua-lsp]
command = "uiua"
args = ["lsp"]

[mi2ebi]

update: i'm working on giving helix uiua support, though at the moment it's blocked by the grammar repo having src/tree-sitter gitignored and i'm not sure how to get diagnostics working