fc-cache on empty directory prints an error
Started with f5dd8512 and affects Arch Linux users upgrading to fontconfig 2.13.1.
It appears to be a cosmetic issues only, since it only happens with directories that contain no fonts.
$ mkdir empty-test-dir
$ fc-cache empty-test-dir
/../../empty-test-dir: failed to write cache
To upload designs, you'll need to enable LFS and have an admin enable hashed storage.
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