bug#30800: 26.0.91; unknown crash on macos

[Alan Third]

On Sat, Mar 24, 2018 at 11:49:43AM +0100, Charles A. Roelli wrote:
> > Date: Fri, 23 Mar 2018 19:52:10 +0000
> > From: Alan Third <alan@idiocy.org>
> >
> > I would like to revert it if only simplify the code, but I don’t feel
> > that strongly. It may have been fixed in later releases of 10.10. It
> > would be nice if someone using 10.10 could check, but I don’t know who
> > could do that.
> 
> What would you like to check?  I have a partition with 10.10.

Hi Charles, thanks for offering to check this.

I’ve attached a patch for the emacs-26 branch that reverts
d9d383147219f8e6a90d4c177e1b454e19acfac9. It doesn’t revert cleanly,
hence the patch. You could try reverting it on master if you want, but
I suspect it will be harder to do.

Once that’s applied try the reproduction steps in

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=18757#41

Basically the code in question has at least one reproducible bug and
looks as though it should have several more that we haven’t seen yet,
and although we have a work‐around we’re wondering if we can just get
rid of it completely as it appears to have been a work‐around for a
bug introduced in macOS 10.10 and fixed some time later, hopefully
before 10.10 stopped getting fixes.
-- 
Alan Third

0001-Revert-More-flicker-fixes-for-OSX-related-to-bug-187.patch
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