Whenever I typed something in the server chat, my game would freeze for about 5 seconds and then would make Minecraft crash on my computer.

Put the summary of the bug you're having here

What I expected to happen was...:
What I expected to happen was for the words that I typed to go in the chat.

What actually happened was...:
What actually happened was that my game would freeze for 5 seconds and then would crash.

Steps to Reproduce:
1. Type in commands.
2. Attempt to say something in the server chat.
3. Sometimes when you buy/trade something.