GNU bug report logs - #60427
Emacs-29, c++-ts-mode: typing "char" into an empty buffer causes an exception in redisplay.

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Message #32 received at 60427 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Yuan Fu <casouri <at> gmail.com>
Cc: acm <at> muc.de, 60427 <at> debbugs.gnu.org
Subject: Re: bug#60427: Emacs-29, c++-ts-mode: typing "char" into an empty
 buffer causes an exception in redisplay.
Date: Sun, 01 Jan 2023 08:22:24 +0200

> From: Yuan Fu <casouri <at> gmail.com>
> Date: Sat, 31 Dec 2022 14:11:03 -0800
> Cc: Eli Zaretskii <eliz <at> gnu.org>,
>  60427 <at> debbugs.gnu.org
> 
> As Eli observed, this seems like a mismatch between the C++ language grammar you used and the queries used by c++-ts-mode. We need to pin down or declare the version of the language grammar a major mode is written on. Maybe in NEWS file?

I just asked what version of the grammar and library Alan uses.

If we know which version is required. can we devise a test for it?
Then we could run that test when the language grammar is first loaded,
and reject versions that are not suitable.

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