bug#64818: 30.0.50; c++-ts-mode highlight does not work

[Eli Zaretskii]

> From: Theodor Thornhill <theo@thornhill.no>
> Cc: 64818@debbugs.gnu.org
> Date: Mon, 24 Jul 2023 15:26:36 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> From: Wang Diancheng <dianchengwang@gmail.com>
> >> Date: Mon, 24 Jul 2023 12:49:06 +0800
> >> 
> >> I use the latest tree-sitter and tree-sitter modules.
> >> Only preprocessor instructions and comments are highlighted, please see 
> >> attached
> >> screenshot. BTW c-ts-mode highlight is OK.
> >> 
> >> Following are values of treesit-font-lock-feature-list and
> >> treesit-font-lock-level:
> >> 
> >> treesit-font-lock-feature-list is a variable defined in ‘treesit.el’.
> >> 
> >> Its value is
> >> ((comment definition) (keyword preprocessor string type)
> >>  (assignment constant escape-sequence label literal)
> >>  (bracket delimiter error function operator property variable))
> >> Local in buffer sql_select.cc; global value is nil
> >> 
> >> treesit-font-lock-level is a variable defined in ‘treesit.el’.
> >> 
> >> Its value is 3
> >
> > Thanks.
> >
> > Yuan, Theo: can you please look into this?  I can confirm the above
> > behavior, and I also see it in the very first pretest 29.0.90.  So
> > either some change broke c++-ts-mode before April, or maybe the latest
> > changes in the C++ grammar library did that.  treesit-explore-mode
> > seems to show that the code is parsed correctly, so why aren't
> > fontifications working?
> 
> With the version of the grammar on my system everything worked
> perfectly, but I updated the grammar, and now I can reproduce. So it
> seems something upstream broke it. I'll bisect tree-sitter-cpp and
> figure out whats breaking it.

Thanks.  The other report about this perhaps gives a hint:

> From: David Come <david.come@ageagle.com>
> Date: Mon, 24 Jul 2023 09:13:33 +0000
> msip_labels: 
> 
> When opening a C++ file with major mode c++-ts-mode, there is not 
> coloration 
> 
> In the Messsage buffer, I see 
> 
> Error during redisplay: (jit-lock-function 14) signaled (treesit-query-error 
> "Node type error at" 99 "(true)
> @font-lock-constant-face (false) @font-lock-constant-face (null) 
> @font-lock-constant-face (nullptr)
> @font-lock-constant-face" "Debug the query with `treesit-query-validate'") [2 
> times]