[bug] Renaming rhs: expected string|function

[hjkatz]

Everytime I run rename I get this error message:

Error executing vim.schedule lua callback: vim/keymap.lua:0: rhs: expected string|function, got nil
stack traceback:
        [C]: in function 'error'
        vim/shared.lua: in function 'validate'
        vim/keymap.lua: in function 'set'
        [string ":lua"]:53: in function ''
        vim/_editor.lua: in function <vim/_editor.lua:0>

FWIW ignoring the error and continuing seems to work just fine.

Here's my config that I think is relevant:

local lspconfig = require('lspconfig')
local lsp_defaults = lspconfig.util.default_config
local lsp_capabilities = vim.tbl_deep_extend('force', lsp_defaults.capabilities, require('cmp_nvim_lsp').default_capabilities())
local lsp_attach = function(client, bufnr)
  local opts = { buffer = bufnr }
  require("navigator.dochighlight").documentHighlight(bufnr)
  require("navigator.lspclient.highlight").add_highlight()
  require("navigator.lspclient.highlight").diagnositc_config_sign() -- [sic]
  require('navigator.lspclient.lspkind').init()
  vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')

  -- Setup navigator for lsp client
  require("navigator.lspclient.mapping").setup({
    client = client,
    bufnr = bufnr,
  })

  -- call to show code actions as floating text and gutter icon
  local prompt_code_action = function()
    require('navigator.codeAction').code_action_prompt(bufnr)
  end

  -- ray-x/navigator
  -- ref: https://github.com/ray-x/navigator.lua/tree/master#default-keymaps
  -- ref: https://github.com/ray-x/navigator.lua/blob/master/lua/navigator/lspclient/mapping.lua
  -- must override all default mappings for any of them to work
  local keymaps = {
    { mode = 'n', key = 'gr',         func = require('navigator.reference').async_ref }, -- show references and context (async)
    { mode = 'n', key = '<c-]>',      func = require('navigator.definition').definition }, -- goto definition
    { mode = 'n', key = 'gd',         func = require('navigator.definition').definition }, -- goto definition
    { mode = 'n', key = 'gD',         func = vim.lsp.buf.declaration }, -- goto declaration
    { mode = 'n', key = '<leader>/',  func = require('navigator.workspace').workspace_symbol_live }, -- workspace fzf
    { mode = 'n', key = '<C-S-F>',    func = require('navigator.workspace').workspace_symbol_live }, -- workspace fzf
    { mode = 'n', key = 'g0',         func = require('navigator.symbols').document_symbols }, -- document's symbols
    { mode = 'n', key = '<leader>d',  func = vim.lsp.buf.hover }, -- hover window
    { mode = 'n', key = 'K',          func = vim.lsp.buf.hover }, -- hover window
    { mode = 'n', key = 'gi',         func = vim.lsp.buf.implementation }, -- goto implementation (doesn't always work?)
    { mode = 'n', key = '<Leader>gi', func = vim.lsp.buf.incoming_calls }, -- incoming calls
    { mode = 'n', key = '<Leader>go', func = vim.lsp.buf.outgoing_calls }, -- outgoing calls
    { mode = 'n', key = 'gt',         func = vim.lsp.buf.type_definition }, -- goto type definition
    { mode = 'n', key = 'gp',         func = require('navigator.definition').definition_preview }, -- hover definition preview
    { mode = 'n', key = 'gP',         func = require('navigator.definition').type_definition_preview }, -- hover type definition preview
    -- messes up ctrl-hjkl for moving windows
    -- { mode = 'n', key = '<c-k>',      func = vim.lsp.buf.signature_help }, -- sig help
    -- { mode = 'n', key = '<C-S-K>',    func = toggle_lsp_signature }, -- sig help
    -- { mode = 'i', key = '<C-S-K>',    func = toggle_lsp_signature }, -- sig help
    { mode = 'n', key = '<leader>ca', func = vim.lsp.buf.code_action }, -- code action
    { mode = 'n', key = '<leader>cl', func = require('navigator.codelens').run_action }, -- codelens action
    { mode = 'n', key = '<leader>la', func = require('navigator.codelens').run_action }, -- codelens action
    { mode = 'n', key = '<leader>rn', func = require('navigator.rename').rename }, -- rename
    { mode = 'n', key = '<leader>gt', func = require('navigator.treesitter').buf_ts }, -- fzf treesitter symbols
    { mode = 'n', key = '<leader>ts', func = require('navigator.treesitter').buf_ts }, -- fzf treesitter symbols
    { mode = 'n', key = '<leader>ct', func = require('navigator.ctags').ctags }, -- fzf ctags
    { mode = 'n', key = '<leader>ca', func = require('navigator.codeAction').code_action }, -- code action
    { mode = 'v', key = '<leader>ca', func = require('navigator.codeAction').range_code_action }, -- code action
    { mode = 'n', key = '<C-S-C>',    func = prompt_code_action }, -- prompt for possible code actions
    { mode = 'v', key = '<C-S-C>',    func = prompt_code_action }, -- prompt for possible code actions
    { mode = 'n', key = 'gG',         func = require('navigator.diagnostics').show_buf_diagnostics }, -- diagnostics
    { mode = 'n', key = '<leader>G',  func = require('navigator.diagnostics').show_buf_diagnostics }, -- diagnostics
    { mode = 'n', key = 'gL',         func = require('navigator.diagnostics').show_diagnostics }, -- diagnostics
    { mode = 'n', key = '<leader>L',  func = require('navigator.diagnostics').show_diagnostics }, -- diagnostics
    -- doesn't work yet in 0.10 nightly, and I don't use these anyways
    -- { mode = 'n', key = '<leader>cf', func = vim.lsp.buf.format }, -- format code
    -- { mode = 'v', key = '<leader>cf', func = vim.lsp.buf.range_formatting }, -- format code (visual range)
    -- { mode = 'n', key = '<leader>fc', func = vim.lsp.buf.format }, -- format code
    -- { mode = 'v', key = '<leader>fc', func = vim.lsp.buf.range_formatting }, -- format code (visual range)
  }

  for _, km in pairs(keymaps) do
      vim.keymap.set(km.mode, km.key, km.func, opts)
  end
end

[ray-x]

Failed to reproduce with the following init.lua

Do other keymaps have similar issues? I feel might be related to lazyloading.

vim.cmd([[set runtimepath=$VIMRUNTIME]])
local uv = vim.uv or vim.loop
local os_name = uv.os_uname().sysname

local is_windows = os_name == 'Windows' or os_name == 'Windows_NT'

local package_root = '/tmp/nvim/lazy'
local sep = '/'
if is_windows then
  local tmp = os.getenv('TEMP')
  vim.cmd('set packpath=' .. tmp .. '\\nvim\\lazy')
  package_root = tmp .. '\\nvim\\lazy'
  sep = '\\'
else
  vim.cmd([[set packpath=/tmp/nvim/lazy]])
end

local plugin_folder = function()
  local host = os.getenv('HOST_NAME')
  if host and (host:find('Ray') or host:find('ray')) then
    return [[~/github/ray-x]] -- vim.fn.expand("$HOME") .. '/github/'
  else
    return ''
  end
end

local lazypath = package_root .. sep .. 'lazy.nvim'
if not uv.fs_stat(lazypath) then
  vim.fn.system({
    'git',
    'clone',
    '--filter=blob:none',
    'https://github.com/folke/lazy.nvim.git',
    '--branch=stable', -- latest stable release
    lazypath,
  })
end
vim.opt.rtp:prepend(lazypath)
local function load_plugins()
  return {
    {
      'nvim-treesitter/nvim-treesitter',
      config = function()
        require('nvim-treesitter.configs').setup({
          ensure_installed = { 'go' },
          highlight = { enable = true },
        })
      end,
      build = ':TSUpdate',
    },
    { 'neovim/nvim-lspconfig' },
    { 'ray-x/lsp_signature.nvim', dev = (plugin_folder() ~= '') },
    {
      'ray-x/navigator.lua',
      dev = (plugin_folder() ~= ''),
      -- '~/github/ray-x/navigator.lua',
      dependencies = { 'ray-x/guihua.lua', build = 'cd lua/fzy && make' },
      config = function()
        require('navigator').setup({
          keymaps = {
            {
              key = '<Leader>rn',
              func = require('navigator.rename').rename,
              desc = 'rename',
            },
          },
          lsp = {
            -- disable_lsp = { 'rust_analyzer', 'clangd' },
          },
        })
      end,
    },
    {
      'hrsh7th/nvim-cmp',
      dependencies = {
        'neovim/nvim-lspconfig',
        'hrsh7th/cmp-nvim-lsp',
      },
      config = function()
        -- Add additional capabilities supported by nvim-cmp
        local cmp = require('cmp')
        cmp.setup({
          snippet = {
            expand = function(args)
              luasnip.lsp_expand(args.body)
            end,
          },
          mapping = cmp.mapping.preset.insert({
            ['<C-u>'] = cmp.mapping.scroll_docs(-4), -- Up
            ['<C-d>'] = cmp.mapping.scroll_docs(4), -- Down
            -- C-b (back) C-f (forward) for snippet placeholder navigation.
            ['<C-Space>'] = cmp.mapping.complete(),
            ['<CR>'] = cmp.mapping.confirm({
              behavior = cmp.ConfirmBehavior.Replace,
              select = true,
            }),
          }),
          sources = {
            { name = 'nvim_lsp' },
          },
        })
      end,
    },
  }
end

local opts = {
  root = package_root, -- directory where plugins will be installed
  default = { lazy = true },
  dev = {
    -- directory where you store your local plugin projects
    path = plugin_folder(),
  },
}

require('lazy').setup(load_plugins(), opts)

vim.cmd('colorscheme murphy')

[hjkatz]

I'm not sure there are other keymaps with issues. I tried removing the lazy loading using on_attach a while back, but I didn't notice a change.

I've seen this for quite a while and have assumed that it's something in my config. I'm mainly reporting here because I'm looking for help/ideas debugging this.

Could you help point me to the code that looks up the keymaps?

[ray-x]

I think one of the function you trying to set keybinding is nil (maybe because of lazy loading etc)
You can simply modify your config and do this

  for _, km in pairs(keymaps) do
      print('loading ' .. km.key, km.func)
      vim.keymap.set(km.mode, km.key, km.func, opts)
  end

and check which key failed to load.