Error (freezes nvim) when opening markdown with code block name in different case (e.g. "Python", "JSON", "R"): `no such language: R` about nvim-treesitter HOT 13 CLOSED

actually the following patch works for me:

But I don't know if this is too simple where a lot of cases are not taken into account. But for Python vs python, JSON vs json, R vs r, it just works.

diff --git a/lua/nvim-treesitter/query_predicates.lua b/lua/nvim-treesitter/query_predicates.lua
index d4726107..e48f3279 100644
--- a/lua/nvim-treesitter/query_predicates.lua
+++ b/lua/nvim-treesitter/query_predicates.lua
@@ -17,7 +17,7 @@ local non_filetype_match_injection_language_aliases = {

 local function get_parser_from_markdown_info_string(injection_alias)
   local match = vim.filetype.match { filename = "a." .. injection_alias }
-  return match or non_filetype_match_injection_language_aliases[injection_alias] or injection_alias
+  return match or non_filetype_match_injection_language_aliases[injection_alias] or injection_alias:lower()
 end

 local function error(str)

from nvim-treesitter.

Hmm, no, because we can't do optional queries. So let's go with your patch. Do you want to make a PR for it?

Ok. I can submit a PR for it.

from nvim-treesitter.

This is intended. See neovim/neovim#28546

from nvim-treesitter.

This is intended. See neovim/neovim#28546

But you can never ensure language name in markdown code block is lower case. Others who do not use neovim write markdown code block in other cases, and then you open that file and your neovim session just freezes...

from nvim-treesitter.

I have encountered the same issue and it is annoying which make me unable to view the file with infinite error message pops. I used command lua vim.treesitter.stop() to stop the error in order to correct the error...

from nvim-treesitter.

I cannot reproduce this on macOS. And it's important here to distinguish the codeblock annotation (which is case-insensitive) and the language/parser name in your config/on your hard-drive (which must be lower-case).

from nvim-treesitter.

Please let me know if this is clear enough. The minimal config file and the sample markdown file has been already provided in the issue.

It is worth to note that The r parser is automatically installed by nvim-treesitter, and it is r.so, but the code block name in the markdown is R, not r.

from nvim-treesitter.

I use the release from github, not from homebrew. I delete all the files from ~/.cache/nvim. And the issue is still there. Are there any other potential problems occurred?

from nvim-treesitter.

I'll have to investigate. It's a race condition (it doesn't happen if you :e the file after starting) that only appears with nvim-treesitter -- and only on master. If this is not an easy fix (which it looks like it isn't), then I'm afraid this will be "wontfix" and you are recommended to use the main branch on Nvim 0.10+.

from nvim-treesitter.

Thank you, I forgot that master still uses that kludge (it's obsolete with 0.10). Your fix is correct, but I'll see how to best deal with that in the deprecation PR.

from nvim-treesitter.

Hmm, no, because we can't do optional queries. So let's go with your patch. Do you want to make a PR for it? (Best to just lower the input argument, though, so the lookup also works.)

from nvim-treesitter.

you are recommended to use the main branch on Nvim 0.10+.

Thanks. Good to know that there is a main branch. Will definitely play around with the new main branch.

from nvim-treesitter.

Fixed by #6648

from nvim-treesitter.