BUG: failed to open document symbols with pylsp [attempt to index local ‘range’ (a nil value)]

[ideless]

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• [X] I have read all the docs.
• [X] I have searched the existing issues.
• [X] I have searched the existing discussions.

Neovim Version (nvim -v)

0.9.0

Operating System / Version

Ubuntu 20.04.6 LTS

Describe the Bug

Failed to open document_symbols when using pylsp. There is no problem with other lsp servers (at least lua_ls, tsserver) though. I’m not sure if it is a bug of neo-tree or pylsp.

Screenshots, Traceback

Error message:

Error executing vim.schedule lua callback: .../neo-tree/sources/document_symbols/lib/symbols_utils.lua:43: attempt to inde
x local 'range' (a nil value)
stack traceback:
        .../neo-tree/sources/document_symbols/lib/symbols_utils.lua:43: in function 'parse_range'
        .../neo-tree/sources/document_symbols/lib/symbols_utils.lua:111: in function 'parse_resp'
        .../neo-tree/sources/document_symbols/lib/symbols_utils.lua:149: in function 'on_lsp_resp'
        .../neo-tree/sources/document_symbols/lib/symbols_utils.lua:200: in function 'callback'
        ...vim/squashfs-root/usr/share/nvim/runtime/lua/vim/lsp.lua:2021: in function 'handler'
        ...vim/squashfs-root/usr/share/nvim/runtime/lua/vim/lsp.lua:1394: in function ''
        vim/_editor.lua: in function <vim/_editor.lua:0>

Steps to Reproduce

1. install pylsp by mason
2. open a python script
3. open document symbols and see the error

Expected Behavior

document symbols should be opened

Your Configuration

local root = vim.fn.fnamemodify("./.repro", ":p")

-- set stdpaths to use .repro
for _, name in ipairs { "config", "data", "state", "cache" } do
  vim.env[("XDG_%s_HOME"):format(name:upper())] = root .. "/" .. name
end

-- bootstrap lazy
local lazypath = root .. "/plugins/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
  vim.fn.system {
    "git",
    "clone",
    "--filter=blob:none",
    "--single-branch",
    "https://github.com/folke/lazy.nvim.git",
    lazypath,
  }
end
vim.opt.runtimepath:prepend(lazypath)

-- install plugins
local plugins = {
  "neovim/nvim-lspconfig",
  {
    "williamboman/mason.nvim",
    opts = {},
  },
  {
    "williamboman/mason-lspconfig",
    dependencies = {
      "williamboman/mason.nvim",
      "neovim/nvim-lspconfig",
    },
    opts = {
      ensure_installed = { "pylsp" },
    },
    config = function(_, opts)
      local mason_lsp = require("mason-lspconfig")

      mason_lsp.setup(opts)

      mason_lsp.setup_handlers {
        function(server_name) -- default handler
          require("lspconfig")[server_name].setup {}
        end,
      }
    end,
  },
  {
    "nvim-neo-tree/neo-tree.nvim",
    branch = "v3.x",
    dependencies = {
      "nvim-lua/plenary.nvim",
      "nvim-tree/nvim-web-devicons", -- not strictly required, but recommended
      "MunifTanjim/nui.nvim",
    },
    opts = {
      sources = {
        "filesystem",
        "buffers",
        "git_status",
        "document_symbols",
      },
    },
  },
}
require("lazy").setup(plugins, {
  root = root .. "/plugins",
})

[AadityaRavindran]

I see the same issue with pylsp but not with clangd

[miki725]

can confirm its happening for me for pylsp as well but not for gopls for example

[miki725]

also interesting that pyright it works ok. just pylsp is causing issues. does that mean its a bug in the LSP itself? or neo-tree is not handling some response correctly?

seeing this in :LspLog:

[ERROR][2023-10-12 16:36:29] .../vim/lsp/rpc.lua:734    "rpc"   "/root/.local/bin/pylsp"    "stderr"    "2023-10-12 16:36:29,563 EDT - WARNING - pylsp_jsonrpc.endpoint - Received cancel notification for unknown message id 8\n"
[ERROR][2023-10-12 16:36:33] .../vim/lsp/rpc.lua:734    "rpc"   "/root/.local/bin/pylsp"    "stderr"    "2023-10-12 16:36:33,376 EDT - WARNING - pylsp_jsonrpc.endpoint - Received cancel notification for unknown message id 10\n"
[ERROR][2023-10-12 16:36:35] .../vim/lsp/rpc.lua:734    "rpc"   "/root/.local/bin/pylsp"    "stderr"    "2023-10-12 16:36:35,679 EDT - WARNING - pylsp_jsonrpc.endpoint - Received cancel notification for unknown message id 11\n"
[ERROR][2023-10-12 16:36:37] .../vim/lsp/rpc.lua:734    "rpc"   "/root/.local/bin/pylsp"    "stderr"    "2023-10-12 16:36:37,233 EDT - WARNING - pylsp_jsonrpc.endpoint - Received cancel notification for unknown message id 14\n"

although not sure what that means

[bak1an]

I see the same issue with solargraph (ruby lsp) but not with gopls and not with rust-analyzer.