I Was about to start playing minecraft On multiplayer And what happened was The game crashed after the logging in screen. So i dont really understand why it did that, please fix it thanks!

Put the summary of the bug you're having here

What I expected to happen was...: I would be able to play your awesome game minecraft!
Describe what you thought should happen here

What actually happened was...: I logged in to the server. but after seeing the "Logging in" Screen the game crashed and the crash screen came up!
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...Log into minecraft
3. ...Go on a multiplayer server let it load to logging in.
4. ... And it should log you off and send u to a crash screen...