Horses Make Game Crash

I was watching alot of snapshot videos on youtube, so i wanted to check it out

i hopped on a horse in creative, and the game crashed, i tried again in survival, and it crashed again

Steps to Reproduce:
1. Open a world that has tamed horses
2. use survival or creative (didn't try it with adventure mode)
3. hop on a horse and minecraft closes, without doing anything, just closes itself