I've confirmed that this bug isn't present in upstream tzcode, at least not in release 2019c With upstream tzcode on OpenBSD, the results are: tzname[0]: CAT tzname[1]: (three spaces for the latter value)
Discussion had there: http://mm.icann.org/pipermail/tz/2019-November/028596.html http://mm.icann.org/pipermail/tz/2019-November/thread.html The FreeBSD bug report I also made after sending the OpenBSD bug report: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241978
