Whenever i try to join a server minecraft crashes. this has happened 4 times

Put the summary of the bug you're having here

What I expected to happen was to join the server, have a nice time, and maybe leave.

What actually happened was minecraft crashed, i left the game, and i filed the crash report

Steps to Reproduce:
1.Enter Minecraft
2. Log On to a server
3. Play on the server for about a minute