treesitter: attempt to call method 'range' (a nil value) on Neovim 0.12

[Liegia]

Environment

• Neovim: 0.12.0
• nvim-treesitter: cf12346 (master)

Error

Triggers on CursorMoved, WinEnter, and any window-opening action.

E5108: Lua: .../vim/treesitter.lua:196: attempt to call method 'range' (a nil value)
stack traceback:
vim/treesitter.lua:196: in function 'get_range'
vim/treesitter.lua:231: in function 'get_node_text'
nvim-treesitter/query_predicates.lua:120: in function 'handler'
...
vim-matchup/lua/treesitter-matchup/internal.lua:150: in function 'get_matches'
vim-matchup/lua/treesitter-matchup/internal.lua:378: in function 'get_delim'

Root cause

Neovim 0.12 changed vim.treesitter.get_parser() to return nil instead of
throwing an error when no parser is found. vim-matchup's treesitter engine
does not handle the nil return, crashing at internal.lua:150.

Workaround

Remove vim-matchup as dependency entirely. No workaround via config flags
(vim.g.matchup_treesitter_enabled = 0 and enable = false in nvim-treesitter
configs block both have no effect).

[dirkjonker]

I had this exact same backtrace/issue with Ruby files that contain a heredoc string.

After completely removing and reinstalling both matchup and nvim-treesitter, the issue seems to be fixed. I think nvim-treesitter may have had some old query files hanging around that should have been deleted

[TheLeoP]

This bug has nothing to do with vim-matchup, it works perfectly on Neovim 0.12. The bug is probably caused by you using the legacy master branch of nvim-treesitter (which is not compatible with Neovim 0.12). You can even see the stack trace going through nvim-treesitter code