When I tried to create a new map, the game crashed. The problem repeats whenever the world is loaded.
I was hovering over a void.
How to reproduce:
Grab an empty map from the creative menu
Click the right mouse button while holding the map in hand. Possibly you need to be over empty chunks.
I can confirm this. I was also over a void, making a map and when I made it, the game crashed. The strange part was that the void I was over wasn't completely empty, I had placed a block in it.