codeAction (still) broken in neovim 6+

[geekingfrog]

It seems this commit didn't quite fix #22.
I tried to debug it for a while but couldn't figure out the reason. Here's what I have so far:

nvim --version

NVIM v0.6.0
Build type: Release
LuaJIT 2.0.5
Compiled by builduser

Features: +acl +iconv +tui
See ":help feature-compile"

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/usr/share/nvim"

Run :checkhealth for more info

(not I have the same issue with 6.1)

vimrc used:

call plug#begin('~/.config/nvim/plugged')
Plug 'neovim/nvim-lspconfig'

Plug 'junegunn/fzf'
Plug 'junegunn/fzf.vim'
Plug 'gfanto/fzf-lsp.nvim'

call plug#end()


lua << EOF

vim.lsp.set_log_level("debug")

local nvim_lsp = require('lspconfig')

-- Use an on_attach function to only map the following keys
-- after the language server attaches to the current buffer
local on_attach = function(client, 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

  -- Enable completion triggered by <c-x><c-o>
  buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')

  -- Mappings.
  local opts = { noremap=true, silent=true }

  -- See `:help vim.lsp.*` for documentation on any of the below functions
  -- buf_set_keymap('n', '<space>ca', '<cmd>lua vim.lsp.buf.code_action()<CR>', opts)
  buf_set_keymap('n', '<space>ca', '<cmd>CodeActions<CR>', opts)
end

-- Use a loop to conveniently call 'setup' on multiple servers and
-- map buffer local keybindings when the language server attaches
local servers = { 'jedi_language_server', 'rust_analyzer', 'clojure_lsp', 'dhall_lsp_server' }
for _, lsp in ipairs(servers) do

  nvim_lsp[lsp].setup(setup_opts)

end

EOF

When choosing the action to execute, nothing happens and I get the following in :messages:

/usr/share/nvim/runtime/lua/vim/lsp/rpc.lua:346: Cannot serialise function: type not supported
stack traceback:
^I[C]: in function 'encode'
^I/usr/share/nvim/runtime/lua/vim/lsp/rpc.lua:346: in function 'encode_and_send'
^I/usr/share/nvim/runtime/lua/vim/lsp/rpc.lua:394: in function 'request'
^I/usr/share/nvim/runtime/lua/vim/lsp.lua:956: in function 'request'
^I...e/HOME/.config/nvim/plugged/fzf-lsp.nvim/lua/fzf_lsp.lua:395: in function <...e/HOME/.config/nvim/plu
gged/fzf-lsp.nvim/lua/fzf_lsp.lua:384>

It seems the action table passed to the client holds some un-serializable attribute, but when I tried to inspect it further I got nothing, and no metatable. I'm not sure what's going on.

[gfanto]

Thank you for been so accurate on the desciption. Can i also ask you:

1. what language server are you using?
2. is this happening when you use the :CodeAction comand or even using the async handlers? (from the vimrc config snippet seams the CodeAction command because i don't se the setup call for the fzf_lsp, but i wanna make sure to chase the right problem)

[geekingfrog]

1. I'm using rust-analyzer, with the following setup:

cargo new testproject
cd testproject
cat > src/main.rs <<EOF
fn main() {
    let m = BTreeMap::new();
    println!("Hello, world!");
}
EOF

Then open src/main.rs, put the cursor on the BTreeMap and attempt to automatically add the import (use std::collections::BTreeMap)

2. This is happening when calling CodeAction command, which ultimately is going to use an async handler inside fzf_code_actions

[gfanto]

Ok no problem i've found it, the last commit should have fix that (hopefully forever 😅) let me know if it works

[gfanto]

To try just call :PlugUpdate

[geekingfrog]

It woooooorks 🥳 thanks for the quick update.