bug#72863: 30.0.50; tree-sitter elixir-ts-mode hangs and memory leak on some elixir and heex code

[Yuan Fu <casouri@gmail.com>]

> On Sep 11, 2024, at 12:22 PM, mail@ssbb.me wrote:
> 
> Wow, thank you so much for diving into this issue! I'll keep track of it in tree-sitter repo from now on.

My pleasure ;-)

> It seems like other integrations somehow manage to avoid hanging or crashing the main process, so it doesn't affect them?
> I just checked in the Zed editor again to confirm. When I type a={, it fails to highlight the rest of the embedded HEEX (but only within the current function) though.

I know a couple editors uses async parsing, Zed probably also uses async parsing.

Yuan


>> On Sep 11, 2024, at 7:45 AM, Yuan Fu <casouri@gmail.com> wrote:
>> 
>> 
>> 
>>> On Sep 8, 2024, at 12:48 AM, Yuan Fu <casouri@gmail.com> wrote:
>>> 
>>> 
>>> 
>>>> On Sep 8, 2024, at 12:02 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>>>> 
>>>>> From: Yuan Fu <casouri@gmail.com>
>>>>> Date: Sat, 7 Sep 2024 22:57:29 -0700
>>>>> Cc: mail@ssbb.me,
>>>>> wkirschbaum@gmail.com,
>>>>> 72863@debbugs.gnu.org
>>>>> 
>>>>> 
>>>>> 
>>>>>> On Sep 7, 2024, at 10:54 PM, Eli Zaretskii <eliz@gnu.org> wrote:
>>>>>> 
>>>>>>> From: Yuan Fu <casouri@gmail.com>
>>>>>>> Date: Sat, 7 Sep 2024 22:44:53 -0700
>>>>>>> Cc: Wilhelm Kirschbaum <wkirschbaum@gmail.com>,
>>>>>>> Eli Zaretskii <eliz@gnu.org>,
>>>>>>> 72863@debbugs.gnu.org
>>>>>>> 
>>>>>>> Meanwhile, I want to push the fix for the other bug I discovered to emacs-30. Eli, I wrote a debugging function that prints parser states, naturally this function isn’t called anywhere so there’ll be a compiler warning, what should I do in this case?
>>>>>> 
>>>>>> Why would there be a compiler warning?  What kind of warning?
>>>>> 
>>>>> A function-not-used warning. Maybe it’s an lldb thing?
>>>> 
>>>> If the function is not static, there should be no such warning.
>>> 
>>> Ah, you’re right, I marked it static. Thanks!
>>> 
>>> Yuan
>> 
>> Good news: not an Emacs bug. Bad news: a tree-sitter bug. Turns out I made an error in my test program, which is the reason why Emacs hangs but the test program doesn’t. Once I fixed the error, the test program hangs too. I submitted a bug report to tree-sitter: https://github.com/tree-sitter/tree-sitter/issues/3620
>> 
>> I can finally sleep soundly at night now; and I guess tree-sitter dev will start having sleepless nights :-)
>> 
>> Yuan
>> 
>