:TexlabForward throws error executing vim.schedule

[SirLukeSchande]

Description

When running :TexlabForward I get the follwing error: Error executing vim.schedule lua callback: ...ack/packer/start/nvim-lspconfig/lua/lspconfig/texlab.lua:51: attempt to index local 'result' (a nil value)

I use Skim as previewer. The rest of the language server works flawlessly.

Neovim version

NVIM v0.6.0-dev+b9a35ec7a Build type: Release LuaJIT 2.1.0-beta3

Nvim-lspconfig version

7f902f952944aa708c78138f6536c0dc55aec3a2

Operating system and version

macOS 11.6

Affected language servers

texlab

Steps to reproduce

1. Open a .tex file and run :TexlabForward

Actual behavior

Error executing vim.schedule lua callback: ...ack/packer/start/nvim-lspconfig/lua/lspconfig/texlab.lua:51: attempt to index local 'result' (a nil value)

Expected behavior

Skim should open at the position the cursor is at.

Minimal config

vim.cmd [[set runtimepath=$VIMRUNTIME]]
vim.cmd [[set packpath=/tmp/nvim/site]]

local package_root = '/tmp/nvim/site/pack'
local install_path = package_root .. '/packer/start/packer.nvim'

local function load_plugins()
  require('packer').startup {
    {
      'wbthomason/packer.nvim',
      'neovim/nvim-lspconfig',
    },
    config = {
      package_root = package_root,
      compile_path = install_path .. '/plugin/packer_compiled.lua',
    },
  }
end

_G.load_config = function()
  vim.lsp.set_log_level 'trace'
  if vim.fn.has 'nvim-0.5.1' == 1 then
    require('vim.lsp.log').set_format_func(vim.inspect)
  end
  local nvim_lsp = require 'lspconfig'
  local on_attach = function(_, bufnr)
    local function buf_set_keymap(...)
      vim.api.nvim_buf_set_keymap(bufnr, ...)
    end
    local function buf_set_option(...)
      vim.api.nvim_buf_set_option(bufnr, ...)
    end

    buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')

    -- Mappings.
    local opts = { noremap = true, silent = true }
    buf_set_keymap('n', 'gD', '<Cmd>lua vim.lsp.buf.declaration()<CR>', opts)
    buf_set_keymap('n', 'gd', '<Cmd>lua vim.lsp.buf.definition()<CR>', opts)
    buf_set_keymap('n', 'K', '<Cmd>lua vim.lsp.buf.hover()<CR>', opts)
    buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
    buf_set_keymap('n', '<C-k>', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
    buf_set_keymap('n', '<space>wa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>', opts)
    buf_set_keymap('n', '<space>wr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
    buf_set_keymap('n', '<space>wl', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)
    buf_set_keymap('n', '<space>D', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
    buf_set_keymap('n', '<space>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
    buf_set_keymap('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
    buf_set_keymap('n', '<space>e', '<cmd>lua vim.lsp.diagnostic.show_line_diagnostics()<CR>', opts)
    buf_set_keymap('n', '[d', '<cmd>lua vim.lsp.diagnostic.goto_prev()<CR>', opts)
    buf_set_keymap('n', ']d', '<cmd>lua vim.lsp.diagnostic.goto_next()<CR>', opts)
    buf_set_keymap('n', '<space>q', '<cmd>lua vim.lsp.diagnostic.set_loclist()<CR>', opts)
  end

  -- Add the server that troubles you here
  local name = 'texlab'
  local cmd = { "texlab" }
  local capabilities = vim.lsp.protocol.make_client_capabilities()
  --capabilities = require'cmp_nvim_lsp'.update_capabilities(capabilities)
  if not name then
    print 'You have not defined a server name, please edit minimal_init.lua'
  end
  if not nvim_lsp[name].document_config.default_config.cmd and not cmd then
    print [[You have not defined a server default cmd for a server
      that requires it please edit minimal_init.lua]]
  end

  nvim_lsp[name].setup {
    cmd = cmd,
    on_attach = on_attach,
    capabilities = capabilities,
    settings = {
        texlab = {
            build = {
                args = {
                    "-interaction=nonstopmode",
                    "-synctex=1",
                    "%f",
                    "-outdir=./out"
                },
                executable = "latexmk",
            },
            forwardSearch = {
                executable = "/Applications/Skim.app/Contents/SharedSupport/displayline",
                args = {"-g", "%l", "%p", "%f"}
            }
        }
    }
  }

  print [[You can find your log at $HOME/.cache/nvim/lsp.log. Please paste in a github issue under a details tag as described in the issue template.]]
end

if vim.fn.isdirectory(install_path) == 0 then
  vim.fn.system { 'git', 'clone', 'https://github.com/wbthomason/packer.nvim', install_path }
  load_plugins()
  require('packer').sync()
  vim.cmd [[autocmd User PackerComplete ++once lua load_config()]]
else
  load_plugins()
  require('packer').sync()
  _G.load_config()
end

Health check

lspconfig: require("lspconfig.health").check()

• INFO: texlab: configuration checked.

LSP log

https://gist.github.com/SirLukeSchande/0396ef03dcdba655d3cfc01f77d9d6f9

[clason]

What's your texlab version? The command works for me as advertised (on macOS).

[SirLukeSchande]

I am currently on texlab 3.3.0.

[clason]

Then the usual suspicion is that you have an older version of lspconfig lying around somewhere that is being used instead of the one you are looking at.

[clason]

It shouldn't play a role, but there are always problems with changing the outdir. Try removing that. (In fact, remove all build settings.)

[SirLukeSchande]

The nvim-lsp version I stated above is the one i got from PlugSnapshot. That should be the current version, right?

[SirLukeSchande]

The Error persists even without the outdir

[clason]

Try moving the -g argument:

      forwardSearch = {
        executable = '/Applications/Skim.app/Contents/SharedSupport/displayline',
        args = { '%l', '%p', '%f', '-g' },
      },

[SirLukeSchande]

This doesn't change anything.

[clason]

OK, last guess: Are you sure that the PDF is actually built?

[SirLukeSchande]

Yes, I use the :TexlabBuild all the time.

[clason]

I cannot reproduce your problem at all, so I'll close the issue for now -- feel free to reopen when you have found a minimal reproducible example (including TeX files and a full and explicit set of steps).

The only actual issue here that I can see is when you're trying to forward-search into a PDF that does not exist yet (because it's not built) -- then you get the above error because Texlab does not return an error code when the search fails. There's nothing we can do about it; that is something the server needs to change.

[SirLukeSchande]

So I just found something that could narrow down the source of the error. When i first cd into the directory the .tex file is in and then open the file directly, i.e. not over startify or with the :e command inside neovim, the forward search works perfectly. But if I leave out either of the two I still get the error.

Does that help to narrow down what the error is?