Re: "Final" version of tty child frames

[Eli Zaretskii]

> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Cc: rudalics@gmx.at,  jared@finder.org,  emacs-devel@gnu.org
> Date: Thu, 16 Jan 2025 16:46:39 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > In general, when w->cursor are all non-negative, the display engine
> > believes that the cursor position corresponds to point, so violating
> > that could cause problems elsewhere.  
> 
> And my question is where that is.

A $64K question.  In general, grep for "->cursor.vpos >= 0" as the
first approximation.

> > At the very least, this should be prominently documented, and perhaps
> > also some indication of that kept around, so that this abnormality
> > could be easily detected if needed.
> >
> > IOW, let's not add one more subtle factoid into the display code, it
> > has enough already.
> 
> Let's Martin decide if he wants to do more.

Of course.