Game will not fully load.

The game will not fully load.

What I expected to happen was...:
The game to fully load.

What actually happened was...:
Did not fully load, got to almost the end.

Steps to Reproduce:
I do not know. The game was fine in the morning, but didn't close. Started saving and quitting, didnt finish process for hours. I force quitted the program. I uninstalled every bit of minecraft from my system, and reinstalled it, and the bug still occured.