[neovim] Treesitter error when opening panel on Homebrew installation of nvim

[brotherkaif]

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Bug

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When using the officially supported github/copilot.vim plugin on both MacOS and Linux (PopOS), an error message is always displayed when attempting to run either the :Copilot or :Copilot panel command. The plugin itself works fine. The error message can be dismissed by pressing enter and the panel loads up as intended.

However, it is a bit tedious having to dismiss the error message each time I wish to use the panel. The error message can be found below:

Error detected while processing function copilot#Command[33]..function copilot#Command[25]..10[2]..copilot#panel#Open[20]..<SNR>37_Initialize[1]..FileType Autocommands for "*"..function <S
NR>1_LoadFTPlugin[20]..script /home/linuxbrew/.linuxbrew/Cellar/neovim/0.10.1/share/nvim/runtime/ftplugin/lua.lua:                                                                          
E5113: Error while calling lua chunk: ....10.1/share/nvim/runtime/lua/vim/treesitter/language.lua:101: 'copilot.lua' is not a valid language name                                           
stack traceback:                                                                                                                                                                            
        [C]: in function 'error'                                                                                                                                                            
        ....10.1/share/nvim/runtime/lua/vim/treesitter/language.lua:101: in function 'add'                                                                                                  
        ...1/share/nvim/runtime/lua/vim/treesitter/languagetree.lua:111: in function 'new'                                                                                                  
        .../neovim/0.10.1/share/nvim/runtime/lua/vim/treesitter.lua:41: in function '_create_parser'                                                                                        
        .../neovim/0.10.1/share/nvim/runtime/lua/vim/treesitter.lua:108: in function 'get_parser'                                                                                           
        .../neovim/0.10.1/share/nvim/runtime/lua/vim/treesitter.lua:416: in function 'start'                                                                                                
        ...Cellar/neovim/0.10.1/share/nvim/runtime/ftplugin/lua.lua:2: in main chunk
Press ENTER or type command to continue

A few bits of additional context:

• Tested on both MacOS and PopOS
• In both cases, neovim was given a clean reinstall of nvim 0.10.1 (via homebrew)
• All prior configurations and plugins were cleared from $HOME/.local/share/nvim, $HOME/.local/state/nvim and $HOME/.cache/nvim
• Other 3rd party copilot plugins have not been installed (e.g. copilot.lua or CopilotChat.nvim), only the official copilot.vim plugin

As mentioned, the plugin does work, it's just this error that always pops up prior to opening the panel that needs to be dismissed each time. Is this a limitation of the Homebrew version of Neovim?

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[tpope]

I have reported this as a Neovim bug at neovim/neovim#30711.

[GitMurf]

I have confirmed the same error and see that you have reported it upstream which makes sense 👍 But after pressing Enter to dismiss the error, the Panel does open and the 10 suggestions do populate, but pressing <CR> on a suggestion does nothing. Have you heard this reported before from Neovim users? Is there a command I can run directly with Lua to try and replicate what <CR> is supposed to do for accepting a suggestion? Thanks!

[tpope]

Looks like that Neovim error short circuits the rest of the initialization code, so that map never gets created. I'll add a workaround to the next release.

[GitMurf]

Thanks @tpope! Your legend precedes you! ;)