https://bugs.winehq.org/show_bug.cgi?id=50779
--- Comment #9 from Rafał Mużyło galtgendo@o2.pl --- So,...
I've just stumbled upon this problem in a game using the older version of this engine - RPGMaker XP (this is still basically embedded ruby interpreter + a couple static libs, just an older version of all those).
Definitely not amused.