Wow, thank you so much for diving into this issue! I'll keep track of it in 
tree-sitter repo from now on.

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.


> On Sep 11, 2024, at 7:45 AM, Yuan Fu <caso...@gmail.com> wrote:
> 
> 
> 
>> On Sep 8, 2024, at 12:48 AM, Yuan Fu <caso...@gmail.com> wrote:
>> 
>> 
>> 
>>> On Sep 8, 2024, at 12:02 AM, Eli Zaretskii <e...@gnu.org> wrote:
>>> 
>>>> From: Yuan Fu <caso...@gmail.com>
>>>> Date: Sat, 7 Sep 2024 22:57:29 -0700
>>>> Cc: m...@ssbb.me,
>>>> wkirschb...@gmail.com,
>>>> 72...@debbugs.gnu.org
>>>> 
>>>> 
>>>> 
>>>>> On Sep 7, 2024, at 10:54 PM, Eli Zaretskii <e...@gnu.org> wrote:
>>>>> 
>>>>>> From: Yuan Fu <caso...@gmail.com>
>>>>>> Date: Sat, 7 Sep 2024 22:44:53 -0700
>>>>>> Cc: Wilhelm Kirschbaum <wkirschb...@gmail.com>,
>>>>>> Eli Zaretskii <e...@gnu.org>,
>>>>>> 72...@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
> 

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