bug#59693: 29.0.50; treesitter in base buffer doesn't respond to modifications in indirect buffer correctly

[Eli Zaretskii]

On December 5, 2022 5:49:14 AM GMT+02:00, Stefan Monnier 
<monnier@iro.umontreal.ca> wrote:
> 
> Don't bother, please.
> Instead, I recommend you disallow the use of tree sitter in indirect
> buffers.  And we should probably try and change `insdel.c` so it always
> runs the `after/before-change-functions` in the base buffer (this should
> fix the worst part of the problems).


Will this "hold water" vis-a-vis the expectations of various features that 
would like to use tree sitter related capabilities?  Regardless of your opinion 
on indirect buffers, many 3rd party packages and features use indirect buffers 
as the backbone of their implementation.  We don't currently have any 
alternatives to that, AFAIK.  So I'd expect a lot of disappointment if we 
declare that indirect buffers will not be supported by tree sitter as a matter 
of design decision.

Changing insdel.c to run stuff in base buffer could be a solution, but I don't 
feel we can make such changes on the release branch.  But maybe we can do that 
now only for treesit.c functions.  Yuan, would tgat solve this particular 
problem?