Can't learn martial arts style, crash

i’m using an experimental build from sometime last week, v7.1-1037-g76b776f

i know fixing NPCs isn’t really a priority right now, but i’m having a bug where when i try to learn a different martial arts style from an NPC other than the one i started with my game crashes. now the reason that this bug is so annoying for me right now is that i accidentally started with aikido instead of my old favourite, Taekwando, and i’m too far along in the game to simply start over.

It’s a long known issue.