bug#30874: 27.0.50; Emacs crashes

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Cc: Robert Pluim <rpluim@gmail.com>,  30874@debbugs.gnu.org,  
> jsynacek@redhat.com
> Date: Fri, 30 Mar 2018 01:10:27 -0400
> 
> Eli Zaretskii wrote:
> 
> > Does harfbuzz require Cairo?  If it does, that's unfortunate, because
> > the Cairo rendering option currently has a few known and annoying
> > redisplay bugs, which no one seems to be willing/capable of fixing.
> 
> Jan mentioned this in the initial addition of cairo:
> 
> http://lists.gnu.org/archive/html/emacs-devel/2015-02/msg00795.html
> 
>    [...] it is just a step to keep up with the times, i.e. server side
>    (as in X11 server) rendering is going away as it seems. So Emacs must
>    at some point develop client side (cairo) rendering.

Yes, we hoped Cairo will gradually take over the current defaults, but
its problems must be fixed before we can do that.