Subject: Re: bug#65057: 29.1.50; cc-guess does not work with tree-sitter modes

From: Eli Zaretskii <[email-masked]>
Date: Fri, 04 Aug 2023 21:04:17 +0300

tags 65057 notabug
thanks

> From: Kai Ma <[email-masked]>
> Date: Sat, 05 Aug 2023 01:31:16 +0800
> 
> 
> c-guess-buffer called in a buffer whose major mode is c-ts-mode will
> raise the following error:
> 
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>   looking-at(nil)

cc-guess is incompatible with c-ts-mode, and should not be invoked in
a buffer under c-ts-mode.  IOW, "don't do that".

This is not a bug, this is a cockpit error.