Re: emacs-31 29bbd02347d: Fix treesit_cursor_helper_1 for zero-width nodes (bug#81436)

> From: Michael Albinus <[email protected]>
> Cc: Yuan Fu <[email protected]>
> Date: Mon, 27 Jul 2026 18:19:03 +0200
> 
> Yuan Fu <[email protected]> writes:
> 
> Hi,
> 
> > branch: emacs-31
> > commit 29bbd02347da44599cc9778d9d626fc5c8ca4b2e
> > Author: Yuan Fu <[email protected]>
> > Commit: Yuan Fu <[email protected]>
> >
> >     Fix treesit_cursor_helper_1 for zero-width nodes (bug#81436)
> >     
> >     * lisp/treesit.el (treesit--some): Add edebug declare.
> >     * src/treesit.c (treesit_cursor_helper_1): Don't use
> >     ts_tree_cursor_goto_first_child_for_byte for zero-width nodes.
> 
> I'm not sure whether it was *this* commit. However, tree-sitter tests on
> emba fail now:

It's definitely that commit.  On my system, the test crashes due to
infinite recursion.

I tried to fix that now.  Yuan, please see if I got the logic right.