Invalid 'end_col': out of range error whenever running Neogen file

[yann-qu]

Whenever I run the command Neogen file to generate comment for the entire file, I get the following error message if the file's first line is blank:

E5108: Error executing lua ...e/yann/.local/share/nvim/lazy/neogen/lua/neogen/mark.lua:72: Invalid 'end_col': out of range
stack traceback:
        [C]: in function 'nvim_buf_set_extmark'
        ...e/yann/.local/share/nvim/lazy/neogen/lua/neogen/mark.lua:72: in function 'add_range_mark'
        ...n/.local/share/nvim/lazy/neogen/lua/neogen/generator.lua:358: in function 'generate'
        [string ":lua"]:1: in main chunk
Press ENTER or type command to continue

If I press the key ENTER, the comment will still be generated successfully, but the error message is really annoying.

Code example which generates error message when I run the command Neogen file:

Code example which works fine when I run the command Neogen file:

Neogen version:

branch main
commit 70127ba

Neovim version:

NVIM v0.9.5
Build type: Release
LuaJIT 2.1.1692716794

OS: Ubuntu 20.04 in wsl2

I know it's a really small and insignificant problem, but I'll be really grateful if you could help me.

[KnBrckr]

I'm seeing the same issue with neogen:

tag     2.15.2
branch  main
commit  cb1f384

Neovim version:

NVIM v0.9.4
Build type: Release
LuaJIT 2.1.1703358377

[ssiyad]

neogen/lua/neogen/generator.lua

Line 358 in cb1f384

mark:add_range_mark({ row, 0, row + #template_content, 1 })

I tried to replace 1 with 0 and it works fine. I don't actually know what the issue is but it might be related to nvim_buf_set_extmark.

Also, lsp throws some warnings in this code block

@danymat