I was playing in a world with some friends. Then, when I opened a chest and my game crashed. It did this several times before I exported my world and reinstalled the game. After this, the game was running really slow. It took more than 5 minutes to load into a world compared to the neer 15 seconds. Now that I am in the world I go to sleep and my game crashes. So, I restart Minecraft and join again and the game says I am sleeping in the loading screen then crashes. I have not found any bug reports with this bug in it. I hope you can fix this soon.