i logged on to a server an my minecraft crashed and it keeps on happening

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here to log on to the serv er and play on the server

What actually happened was...:
Describe what happened here i logged onto the server and my minecraft crashed

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here open mine craft
2. ...go onto a server
3. ...