…unning with erl +W w
Kostis Sagonas is a patient guy. Developers like me must exasperate him quite a bit: someone who should know better than to forget to use a tool as valuable as Dialyzer as frequently and as naturally as breathing. We in the Erlang community get there, eventually, I hope, one rap on the knuckles at a time.
Accomodate the return value from calendar:local_time_to_universal_time_dst/1 which can return 0, 1, or 2 times. Weird that the original OTP code doesn't have this problem....