Failed 1 test out of 2459, 99.96% okay.
...
run/locale.t .. Failed 2/9 subtests
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Looking at the source, it's really just testing what the message said: complicated LC_ALL settings. AFAIK, this should only affect you if you're using locale in the first place (are you?) and you happen to trigger this specific bug with a complicated LC_ALL. If you think that's unlikely, I'd probably go ahead and ignore it and install Perl. You can of course also report this via perlbug.