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

[Alan Mackenzie]

Hello, Yuan.

On Fri, Dec 30, 2022 at 22:55:41 -0800, Yuan Fu wrote:


> > On Dec 30, 2022, at 10:42 PM, Eli Zaretskii <eliz@gnu.org> wrote:

> >> Cc: 60427@debbugs.gnu.org
> >> From: Yuan Fu <casouri@gmail.com>
> >> Date: Fri, 30 Dec 2022 17:02:36 -0800

> >> Thank you! I couldn’t reproduce it on the latest trunk

> > AFAIU, the report was about the emacs-29 branch, not about the master
> > branch.  So what did you mean by "latest trunk" above?

> Sorry, imprecise wording, I mean latest emacs-29 :-)

I've just downloaded the latest commits in the emacs-29 branch,
bootstrapped, and I still see the problem, both in X GUI and on a Linux
console.  Just as a matter of interest, I get the error after typing the
h in "char", so the problem would appear not to be related to the
specific character string "char".

As you mentioned, the backtrace now looks a bit different, namely:

Error: treesit-query-error ("Node type error at" 195 "[\"break\" \"case\" 
\"const\" \"continue\" \"default\" \"do\" \"else\" \"enum\" \"extern\" \"for\" 
\"goto\" \"if\" \"inline\" \"register\" \"return\" \"sizeof\" \"static\" 
\"struct\" \"\switch\" \"typedef\" \"union\" \"volatile\" \"while\" \"and\" 
\"and_eq\" \"bitand\" \"bitor\" \"catch\" \"class\" \"co_await\" \"co_return\" 
\"co_yield\" \"compl\" \"concept\" \"consteval\" \"constexpr\" \"constinit\" 
\"decltype\" \"delete\\" \"explicit\" \"final\" \"friend\" \"mutable\" 
\"namespace\" \"new\" \"noexcept\" \"not\" \"not_eq\" \"operator\" \"or\" 
\"or_eq\" \"override\" \"private\" \"protected\" \"public\" \"requires\" 
\"template\" \"throw\" \"try\" \"typename\"\ \"using\" \"virtual\" \"xor\" 
\"xor_eq\"] @font-lock-keyword-face (auto) @font-lock-keyword-face (this) 
@font-lock-keyword-face" "Debug the query with `treesit-query-validate'")
  debug-early-backtrace()
  debug-early(error (treesit-query-error "Node type error at" 195 "[\"break\" 
\"case\" \"const\" \"continue\" \"default\" \"do\" \"else\" \"enum\" \"extern\" 
\"for\" \"goto\" \"if\" \"inline\" \"register\" \"return\" \"sizeof\" 
\"static\" \\"struct\" \"switch\" \"typedef\" \"union\" \"volatile\" \"while\" 
\"and\" \"and_eq\" \"bitand\" \"bitor\" \"catch\" \"class\" \"co_await\" 
\"co_return\" \"co_yield\" \"compl\" \"concept\" \"consteval\" \"constexpr\" 
\"constinit\" \"declty\pe\" \"delete\" \"explicit\" \"final\" \"friend\" 
\"mutable\" \"namespace\" \"new\" \"noexcept\" \"not\" \"not_eq\" \"operator\" 
\"or\" \"or_eq\" \"override\" \"private\" \"protected\" \"public\" \"requires\" 
\"template\" \"throw\" \"try\"\ \"typename\" \"using\" \"virtual\" \"xor\" 
\"xor_eq\"] @font-lock-keyword-face (auto) @font-lock-keyword-face (this) 
@font-lock-keyword-face" "Debug the query with `treesit-query-validate'"))
  treesit-font-lock-fontify-region(1 5 nil)
  font-lock-default-fontify-region(1 5 nil)
  font-lock-fontify-region(1 5)
  #f(compiled-function (fun) #<bytecode 
-0x156e29a3e4e81ac3>)(font-lock-fontify-region)
  jit-lock--run-functions(1 5)
  jit-lock-fontify-now(1 5)
  jit-lock-function(1)
  redisplay_internal\ \(C\ function\)()


I forgot to give my configuration arguments, maybe that has something to
do with it.  They're:

  ./configure --with-gif=no --with-tiff=no --with-gpm --with-native-compilation

..

> Yuan

-- 
Alan Mackenzie (Nuremberg, Germany).