bug#24918: 25.1; Fonts can make Emacs grind to a halt

[Eli Zaretskii]

> From: Klaus-Dieter Bauer <bauer.klaus.dieter@gmail.com>
> Date: Sun, 27 Nov 2016 22:12:48 +0100
> Cc: 24918@debbugs.gnu.org
> 
> I tried compiling the emacs-25 branch , freshly cloned (25.1.50.1) and ran it 
> as "emacs -Q". I hope that is the
> version you meant. 
> 
> The issue persists unless setting (setq inhibit-compacting-font-caches t), as 
> before.
> 
> It can be reproduced by scrolling (with mouse or keyboard) in info node `(cl) 
> Structures'. If scrolling fast, such
> that the multiple input events queue up while Emacs is hanging, Emacs freezes 
> permanently and has to be
> killed. 

Is this because you use the Noto Mono font, or is this with the
default fonts?  If the latter, please show how you customized Emacs to
use Noto Mono.

Thanks.