When trying to load any world, the game occasionally stops working. There are no errors in the logs at all, it just freezes forever. I have not been able to find a pattern in these crashes.
Steps to reproduce:
1. Create a new world
2. Try to load it a few times
3. The game will freeze, requiring you to force-quit it
I am no longer experiencing this issue in 15w40b. I don't know whether it was fixed in this snapshot or in a previous one.