When I try to go onto a server, it says that my game has crashed. It just started doing this after I downloaded a map.

Put the summary of the bug you're having here

What I expected to happen was...:
I would go on the server that I clicked

What actually happened was...:
It turned to a white screen and said that the game had crashed

Steps to Reproduce:
1. Open Minecraft
2. Click on the multiplayer tab
3. Click on a server of your choice
4. It says that the game crashed and you never get on the server