bug#30800: 26.0.91; unknown crash on macos

[Eli Zaretskii]

> Date: Sat, 24 Mar 2018 10:29:58 +0000
> From: Alan Third <alan@idiocy.org>
> Cc: Eli Zaretskii <eliz@gnu.org>, 30800@debbugs.gnu.org
> 
> > Maybe this is a weird idea, but what if we apply my patch, then revert
> > the code and my patch so that if the flicker returns and the revert is
> > reverted at least the crash would be fixed?
> 
> That would be up to Eli, but I think we should at least put your patch
> in Emacs 26.

What patch is that?  Can you show it to me?