Upgrading Erlang to 20.1 makes Wings crash when creating a cube

[micheus]

Dan warned me about to use the latest Erlang compiler due a issue related to WxWidgets - not sure it's causing what you are reporting.
Anyway, the current Wings3D version was built using the previous Erlang version - Erlang/OTP 20 - maybe the 19.3, but the 20.0 I have it installed and working - at least on Windows. (download all OSs and versions)