bug#67604: Motion problems with inline images

[Eli Zaretskii]

> From: JD Smith <jdtsmith@gmail.com>
> Date: Mon, 11 Dec 2023 14:06:38 -0500
> Cc: 67604@debbugs.gnu.org
> 
> 
> 
> > On Dec 5, 2023, at 10:31 PM, Eli Zaretskii <eliz@gnu.org> wrote:
> >> OK, so this was likely a false positive then.  I’m out of ideas.  Maybe 
> >> Windows is magically immune.
> > 
> > Unlikely.  More likely is that we need some specific metrics of the
> > displayed stuff to see the problem (which is therefore very rare).
> 
> I agree with this sentiment: it does seem to require special tuning to reveal 
> itself.  I wanted to check to see if you had received my news that I 
> reproduced the line-skip motion bug on a GNU/Linux system.  That would seem 
> to confirm it’s a general issue with the display/motion code dealing with 
> inline images.  Let me know if I can produce anything else to help with this 
> one.  Thanks.

I've eventually succeeded in reproducing it.  I will get to it when I
have time; however, with the current tempest on emacs-devel and other
urgent issues, I don't know when will that be.