Bug#909841: fc-cache failure preventing dpkg configuration of libreoffice updates

[sixerjman]

Ran into this problem when the aptitude upgrade was interrupted yesterday.
Trying 'dpkg --configure -a' resulted in the following:

dpkg: dependency problems prevent configuration of libreoffice-core:
 libreoffice-core depends on fontconfig; however:
  Package fontconfig is not configured yet.

dpkg: error processing package libreoffice-core (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-calc:
 libreoffice-calc depends on libreoffice-core (= 1:6.1.2-1); however:
  Package libreoffice-core is not configured yet.

dpkg: error processing package libreoffice-calc (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-gtk2:
 libreoffice-gtk2 depends on libreoffice-core (= 1:6.1.2-1); however:
  Package libreoffice-core is not configured yet.

...etc. for all libreoffice products.  fc-cache produced
'/var/log/fontconfig.log' which is attached.
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