ncl: ram usage on completion in neovim

[sedlund]

Describe the bug

When using nls in neovim (lunarvim) tabbing through completions continually causes ram usage to grow infinitely

To Reproduce
This is a minimal reproducer using tab to cycle through completions, it does the same if you are searching through completions growing infinitely larger.

d=ncl-ram-usage; mkdir $d && cd $d
nix flake init -t github:tweag/tf-ncl#hello-tf

in flake.nix:

use the latest nickel / ncl release

tf-ncl.inputs.nickel.follows = "nickel";

add github profider

nix flake update
git init # required for lvim to autostart lsp
git add flake.nix
echo -e "use flake\nlink-schema" > .envrc
direnv allow

Add syntax highlighting plugin for neovim:

lvim.plugins = {
  {
    "nickel-lang/vim-nickel",
  },
}

Setup nls in lunarvim (neovim) config.lua:

require('lspconfig')["nickel_ls"].setup {}

if using mason to autoconfigure lsp's disable it for nickel

vim.list_extend(lvim.lsp.automatic_configuration.skipped_servers, { "nickel_ls" })

lvim main.ncl

tf-ncl-nls-2024-03-21_18-34-00.webm

notice the difference in ram usage behaviour after I delete the content of the config

Expected behavior
ram usage should not be so high?

Environment

• NixOS 24.05.20240319.b06025f
• Version of the code: nickel-lang-cli nickel 1.5.0 (rev 35a5246)