When I type something in on multiplayer and send it, minecraft crashes

When I Type something in on a multiplayer server and send the message. My Minecraft crashes.

What I expected to happen was...:: I Expected to see the message.
Describe what you thought should happen here

What actually happened was...:: Minecraft Crashed
Describe what happened here: I Type Something in and sent it and my minecraft crashed

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