I was messing around with the new snapshot with command blocks. at one point I was standing on an armor stand, and I started to type '/setblock ...', but when I typed the space after the /setblock the game just crashed. After it I tried it more one time (on an armor stand) and the same thing happend again. after it to check if this is just on armor stand on also other entities I tried it with a cow, and again, the game crashed. I didnt check on other command and entites, but I think its just /setblock on any entity.
(btw this is my second bug report and my first one was a duplicate, I checked and I didnt found any report on it)