bug#45038: 27.1; blank display

[Alan Third]

On Fri, Dec 04, 2020 at 09:45:02AM +0100, Stefan Kangas wrote:
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > > Please see screen shots at http://jovi.net/Emacs-Bug
> > > of a Heisenbug I never saw until maybe a year ago.
> > > Now I see it every day or so.  Hope this helps.
> >
> > I think this is a known problem already solved in the repository.  can
> > you try building the latest emacs-27 branch?
> 
> I could have sworn I saw this the other week on master.  If you
> believe it is fixed, then perhaps I was using an old version at the
> time.  Please ignore me for now, I'll report back if I see it again.

It should be fixed on master, but not in any version of Emacs 27. It's
a large change so was never back ported.

Stefan, if you're still seeing problems on master then there must be
some other problem that I'm unaware of.
-- 
Alan Third