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From: Alexander Shukaev <emacs@Alexander.Shukaev.name>
Newsgroups: gnu.emacs.bug
Subject: bug#43177: Bug: Emacs 27.1 hangs forever in `FcCharSetSubtractCount' from '/usr/lib/libfontconfig.so.1'
Date: Thu, 3 Sep 2020 11:02:16 +0200
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Xref: csiph.com gnu.emacs.bug:134807

/usr/share/fonts/TTF/AdobeBlank-Regular.ttf is owned by 
ttf-google-fonts-git 20171026-1

I will try updating it now and see if it fixes the issue.  However, even 
if it does, I have a bunch of follow-up questions:

1.  How to protect Emacs from having that issue again regardless of 
broken/out-dated fonts?  Can I somehow, for example, exclude such fonts 
from consideration by Emacs?
2.  Why was this font queried at all in the first place?  I don't use 
this font.