Can't locate object method "year_length" via package "DateTime" at /home/cpansand/.cpan/build/2020081520/DateTime-Format-ISO8601-0.13-0/blib/lib/DateTime/Format/ISO8601.pm line 1051, <DATA> line 1.
# Tests were run but no plan was declared and done_testing() was not seen.
# Looks like your test exited with 255 after test #15.
# Seeded srand with seed '20200815' from local date.
t/base-datetime.t ......
Dubious, test returned 255 (wstat 65280, 0xff00)
All 15 subtests passed
... (etc) ...
The test suite fails on some of my smokers:
Probably this happens if DateTime is too old: