bug#59902: 30.0.50; Image overlay is not updated until the cursor moves to the overlay

[Eli Zaretskii]

> From: Ihor Radchenko <yantar92@posteo.net>
> Cc: 59902@debbugs.gnu.org
> Date: Thu, 08 Dec 2022 11:52:49 +0000
> 
> > Finally, a stab in the dark: the fact that the problem disappears when
> > you move the cursor might mean that a call to 'redisplay' (or some
> > other trigger for redisplay to know stuff has changed) is missing
> > somewhere.
> 
> Nope. When I move the cursor away, the erroneous image is displayed again.

?? Really?

And the fact that you report this for Emacs 30, does it mean that
previous versions don't behave like that and this is a recent
regression?