FIX: ioerror font cache, second try #10858
Merged
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PR Summary
As #10857 except against master... My bad
As per #9676 (review) #9676 didn't actually catch the font cache error (well, it caught it, but threw another error instead).
This should fix. @lmr, if you are able to test, that would be very helpful, because I can't actually trigger the error!
PR Checklist