when i type minecraft crashes

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
for me to chat
What actually happened was...:
Describe what happened here
when i hit enter for chat minecraft crashed
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...i presed t to type hi
3. ...then when i hit enter minecraft crashed