Description

kaddkaka

opened on Feb 6, 2026

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When my cursor is position marked below, calling vim.lsp.buf.definition() in Neovim will result in an error reply.

from collections import namedtuple

Access = namedtuple("Access", ["address", "type"])

a = Access(100, "w")
a.address
#   ^------ With the cursor here

Results in this Neovim error:

Error executing vim.schedule lua callback: ...nt_nvimhJLLgB/usr/share/nvim/runtime/lua/vim/lsp/buf.lua:226: Cursor position outside buffer
stack traceback:
        [C]: in function 'nvim_win_set_cursor'
        ...nt_nvimhJLLgB/usr/share/nvim/runtime/lua/vim/lsp/buf.lua:226: in function 'on_response'
        ...nt_nvimhJLLgB/usr/share/nvim/runtime/lua/vim/lsp/buf.lua:245: in function 'handler'
        ...nvimhJLLgB/usr/share/nvim/runtime/lua/vim/lsp/client.lua:682: in function ''
        vim/_editor.lua: in function <vim/_editor.lua:0>
Press ENTER or type command to continue

And after pressing opening a new buffer called /None with no content. (None is the null value in python)

Is this an issue in solely in Neovim or some bad interaction between Neovim and pylsp?

Environment:

• python-lsp-server (pylsp) 1.14.0
• python 3.13.7
• nvim 0.11.5

I also posted similar comment with more Neovim details at neovim/neovim#30908

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1. kaddkaka commented on Feb 6, 2026

   

   kaddkaka

   on Feb 6, 2026

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   On a similar setup but with different python version I got this traceback from inside pylsp:

   """
   WARNING - pylsp.config.config - Failed to load hook pylsp_definitions: unsupported operand type(s) for -: 'NoneType' and 'int'
   Traceback (most recent call last):
     File \"/home/david/.local/share/pipx/venvs/python-lsp-server/lib/python3.12/site-packages/pylsp/config/config.py\", line 40, in _hookexec
       return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     File \"/nix/store/2zjymfkfbrxqz7cxj9pvrd3ci0s8rjgr-python3.10-pluggy-1.5.0/lib/python3.10/site-packages/pluggy/_manager.py\", line 480, in traced_hookexec
       return outcome.get_result()
              ^^^^^^^^^^^^^^^^^^^^
     File \"/nix/store/2zjymfkfbrxqz7cxj9pvrd3ci0s8rjgr-python3.10-pluggy-1.5.0/lib/python3.10/site-packages/pluggy/_result.py\", line 100, in get_result
       raise exc.with_traceback(exc.__traceback__)
     File \"/nix/store/2zjymfkfbrxqz7cxj9pvrd3ci0s8rjgr-python3.10-pluggy-1.5.0/lib/python3.10/site-packages/pluggy/_result.py\", line 62, in from_call
       result = func()
                ^^^^^^
     File \"/nix/store/2zjymfkfbrxqz7cxj9pvrd3ci0s8rjgr-python3.10-pluggy-1.5.0/lib/python3.10/site-packages/pluggy/_manager.py\", line 477, in <lambda>
       lambda: oldcall(hook_name, hook_impls, caller_kwargs, firstresult)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     File \"/nix/store/2zjymfkfbrxqz7cxj9pvrd3ci0s8rjgr-python3.10-pluggy-1.5.0/lib/python3.10/site-packages/pluggy/_callers.py\", line 139, in _multicall    raise exception.with_traceback(exception.__traceback__)
     File \"/nix/store/2zjymfkfbrxqz7cxj9pvrd3ci0s8rjgr-python3.10-pluggy-1.5.0/lib/python3.10/site-packages/pluggy/_callers.py\", line 103, in _multicall    res = hook_impl.function(*args)
             ^^^^^^^^^^^^^^^^^^^^^^^^^
     File \"/home/david/.local/share/pipx/venvs/python-lsp-server/lib/python3.12/site-packages/pylsp/plugins/definition.py\", line 69, in pylsp_definitions
       \"start\": {\"line\": d.line - 1, \"character\": d.column},
                         ~~~~~~~^~~
   TypeError: unsupported operand type(s) for -: 'NoneType' and 'int'
   """
   

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