Your bug report

#43177: Bug: Emacs 27.1 hangs forever in `FcCharSetSubtractCount' from '/usr/lib/libfontconfig.so.1'

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 43177@debbugs.gnu.org.

-- 
43177: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=43177
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems