[Bug 279359] editors/neovim: error when opening lua code

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=279359

            Bug ID: 279359
           Summary: editors/neovim: error when opening lua code
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: adamw@FreeBSD.org
          Reporter: markj@FreeBSD.org
          Assignee: adamw@FreeBSD.org
             Flags: maintainer-feedback?(adamw@FreeBSD.org)

After the recent update to 0.10.0, I get an annoying error when opening lua
code.

In a freshly installed VM with no config, if I run `echo 'print("hello,
world")' > test.lua` and then run `nvim test.lua`, I'm greeted with:

---
Error detected while processing BufReadPost Autocommands for "*":
Error executing lua callback: /usr/local/share/nvim/runtime/filetype.lua:35:
Error executing lua: /usr/local/share/nvim/runtime/filetype.lua:36: BufReadPost
Au
tocommands for "*"..FileType Autocommands for "*"..function
<SNR>1_LoadFTPlugin[20]..script /usr/local/share/nvim/runtime/ftplugin/lua.lua:
Vim(runtime):E5113:
 Error while calling lua chunk:
...local/share/nvim/runtime/lua/vim/treesitter/language.lua:107: no parser for
'lua' language, see :help treesitter-parsers
stack traceback:
        [C]: in function 'error'
        ...local/share/nvim/runtime/lua/vim/treesitter/language.lua:107: in
function 'add'
        ...l/share/nvim/runtime/lua/vim/treesitter/languagetree.lua:111: in
function 'new'
        /usr/local/share/nvim/runtime/lua/vim/treesitter.lua:41: in function
'_create_parser'
        /usr/local/share/nvim/runtime/lua/vim/treesitter.lua:108: in function
'get_parser'
        /usr/local/share/nvim/runtime/lua/vim/treesitter.lua:416: in function
'start'
        /usr/local/share/nvim/runtime/ftplugin/lua.lua:2: in main chunk
        [C]: in function 'nvim_cmd'
        /usr/local/share/nvim/runtime/filetype.lua:36: in function
</usr/local/share/nvim/runtime/filetype.lua:35>
        [C]: in function 'nvim_buf_call'
        /usr/local/share/nvim/runtime/filetype.lua:35: in function
</usr/local/share/nvim/runtime/filetype.lua:10>
stack traceback:
        [C]: in function 'nvim_cmd'
        /usr/local/share/nvim/runtime/filetype.lua:36: in function
</usr/local/share/nvim/runtime/filetype.lua:35>
        [C]: in function 'nvim_buf_call'
        /usr/local/share/nvim/runtime/filetype.lua:35: in function
</usr/local/share/nvim/runtime/filetype.lua:10>
stack traceback:
        [C]: in function 'nvim_buf_call'
        /usr/local/share/nvim/runtime/filetype.lua:35: in function
</usr/local/share/nvim/runtime/filetype.lua:10>
---

The code at the top of the stack is this:

    local fname = 'parser/' .. lang .. '.*'
    local paths = api.nvim_get_runtime_file(fname, false)
    if #paths == 0 then
      error("no parser for '" .. lang .. "' language, see :help
treesitter-parsers")
    end
    path = paths[1]

but there's no directory called "parser" in the runtime path.  I suspect that
there are some new files not included in the neovim package.

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