Nvim halts when declaring custom haskell data type about nvim-treesitter HOT 7 CLOSED

{ -- Highlight, edit, and navigate code
    "nvim-treesitter/nvim-treesitter",
    build = ":TSUpdate",
    opts = {
      ensure_installed = { "bash", "c", "html", "lua", "markdown", "vim", "vimdoc" },
      -- Autoinstall languages that are not installed
      auto_install = true,
      highlight = {
        enable = true,
        -- Some languages depend on vim's regex highlighting system (such as Ruby) for indent rules.
        --  If you are experiencing weird indenting issues, add the language to
        --  the list of additional_vim_regex_highlighting and disabled languages for indent.
        additional_vim_regex_highlighting = { "ruby" },
      },
      indent = { enable = true, disable = { "ruby" } },
    },
    config = function(_, opts)
      -- [[ Configure Treesitter ]] See `:help nvim-treesitter`

      ---@diagnostic disable-next-line: missing-fields
      require("nvim-treesitter.configs").setup(opts)

      -- There are additional nvim-treesitter modules that you can use to interact
      -- with nvim-treesitter. You should go explore a few and see what interests you:
      --
      --    - Incremental selection: Included, see `:help nvim-treesitter-incremental-selection-mod`
      --    - Show your current context: https://github.com/nvim-treesitter/nvim-treesitter-context
      --    - Treesitter + textobjects: https://github.com/nvim-treesitter/nvim-treesitter-textobjects
    end,
}