Hi!

kak-tree is panicking when trying to set the language (in this current case, to Rust, but it also happens for any other language I've tested) with the following message:

thread 'main' panicked at src/main.rs:88:35:
called `Result::unwrap()` on an `Err` value: LanguageError { version: 13 }

Steps to reproduce

You can reproduce it by building kak-tree using the instructions on README and only the Rust language as a feature (cargo install --path . --force --features rust), then running any plugin's command (e.g. tree-node-sexp).

Extra info

Rust version: 1.76 on Linux. But I'm sure it has happen for a while, since I tried it several times in the last year.

I've edited the code to print the debug information of the language variable, and it shows: Language(0x000055955bd6fa40). Not sure if it can be useful.