bug#30193: crash in libotf

[Eli Zaretskii]

> From: handa <handa@gnu.org>
> Cc: rgm@gnu.org, 30193@debbugs.gnu.org
> Date: Fri, 26 Jan 2018 21:15:38 +0900
> 
> In article <83h8r9na0c.fsf@gnu.org>, Eli Zaretskii <eliz@gnu.org> writes:
> 
> > > 1. Check the version number of libotf in configure script.
> > > 2. Expose that version number to config.h.
> > > 3. In xfaces.c, if the version number is less than 0.9.16, initialize
> > >    Vface_ignored_fonts to ("Noto Serif Kannada").
> 
> > Why not just add that font to face-ignored-fonts by default?
> 
> For those who build Emacs from source, isn't it better that they do not
> have to change Emacs when they build Emacs with the new version of
> libotf?

Why would they need ti change Emacs?  Is Noto Serif Kannada so
important that we cannot reasonably handle the Kannada script without
it?