These are exhaustive test failures in ICU 63.
The problem relates to the handling NaNs using currency formatters in the sw, sv and ksh locales.
Looks like there is an open PR that hasn't been merged.
Fixed by a commit for ICU-20210.
TBH, it doesn't really matter – just curious is all.
The commit-checker tool wants tickets marked as "fixed" to have a commit with their ID as the primary ticket ID in the commit.