bug#71681: 29.3.50; tree-sitter crash

[Juri Linkov]

>> Evaluating this expression causes a crash:
>>
>> (progn
>>  (find-file (expand-file-name "src/treesit.c" installation-directory))
>>  (c-ts-mode)
>>  (font-lock-ensure 63209 63387))
>>
>> in latest master, but not in latest emacs-29 (only in 5-months old emacs-29).
>>
>> If this is not reproducible, I could provide more details.
>>
>> libtree-sitter is at the latest version.
>
> Hmm, I can’t reproduce with latest master and libtree-sitter.
> Maybe you can send me the exact commits that you used?
>
> Here’s mine:
>
> Emacs: 72f2b01e318
> Tree-sitter: 6ec478c1

The commit are:

Emacs: 6f2036243f2 (2024-06-23, latest master)
Tree-sitter: 3da7deed (2024-06-08, version 0.22.6)

Also fails on old commits:
Emacs: ef01b634d21 (2024-01-18, emacs-29)
Tree-sitter: 870fb877 (2022-11-16, version 0.6.3)

But doesn't fail on:
Emacs: ce85d3811da (2024-06-18, recent emacs-29)
Tree-sitter: 3da7deed (2024-06-08, version 0.22.6)

Maybe it doesn't fail on recent emacs-29 because of the fix in 20af58d3a13?
But the same fix exists in latest master as well.