i was playing on a server and when i typed minecraft crashed

Put the summary of the bug you're having here

What I expected to happen was...:
it would let me type and post it so everybody could see it.

What actually happened was...:
i got on a server wanted to type something and when i pressed enter minecraft crashed.

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...