portmgr@ plans to make python3.6 default version of python in the next weeks.
emulators/playonbsd fails to build with DEFAULT_VERSIONS=python=3.x
Possible fix: switch to USE_WX=3.0
should I mark the port BROKEN ?
A commit references this bug:
Date: Tue Feb 26 10:38:43 UTC 2019
New revision: 493961
Fix build with DEFAULT_VERSIONS=python=3.x