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

[Eli Zaretskii]

> From: Yuan Fu <casouri@gmail.com>
> Date: Sat, 31 Dec 2022 14:06:20 -0800
> Cc: Alan Mackenzie <acm@muc.de>,
>  60427@debbugs.gnu.org
> 
> > On Dec 31, 2022, at 3:05 AM, Eli Zaretskii <eliz@gnu.org> wrote:
> > 
> >> Date: Sat, 31 Dec 2022 10:29:21 +0000
> >> Cc: Eli Zaretskii <eliz@gnu.org>, 60427@debbugs.gnu.org, acm@muc.de
> >> From: Alan Mackenzie <acm@muc.de>
> >> 
> >> As you mentioned, the backtrace now looks a bit different, namely:
> >> 
> >> Error: treesit-query-error ("Node type error at" 195 "[\"break\" \"case\" 
> >> \"co
> > 
> > Yuan, what is "195" in this error message?  According to the source
> > code, its is "error_offset+1", but what is that?  If it's a buffer
> > position, then how come we see 195 when the buffer has only "char" in
> > it?
> 
> It is the position of the error in the query string. Any suggestion to make 
> that clearer in the message? Maybe “Node type error in the query string at”?

And the "query string" is that long string enclosed in [] brackets?

"Node type error at query string position" is the best I can come up
with, but the problem is that figuring out where is that is not easy,
given all the backslashes.  Not sure what we can do about that,
though.