bug#59426: 29.0.50; [tree-sitter] Some functions exceed maximum recursion limit

[Yuan Fu]

> On Nov 23, 2022, at 2:40 AM, Mattias Engdegård <mattiase@acm.org> wrote:
> 
> 23 nov. 2022 kl. 00.19 skrev Yuan Fu <casouri@gmail.com>:
> 
>> It’s a machine generated file with syntax that tree-sitter-c can’t handle 
>> very well. The file is from bug#45248.
> 
> If you mean 
> https://gitlab.com/wireshark/wireshark/-/raw/master/epan/dissectors/packet-rrc.c,
>  then the parse tree would certainly be wide but not at all tall as far as I 
> can tell. There is a fairly long array initialiser in there, but I've seen 
> worse -- and it shouldn't be treated recursively, should it?

It shouldn’t, but tree-sitter thinks some closing brackets are erroneous and 
skips them when parsing (it skips erroneous tokens in the hope to parse the 
rest of the file despite local errors). So a 10k wide tree becomes 10k tall.

We can submit a bug repot to tree-sitter-c (“maybe don’t skip closing brackets 
even there is error, or somthing”), but that’s another story.

Yuan