I have been trying to log on to servers (MineCraft) in 1.7 and it always crashes my entire game!

Put the summary of the bug you're having here

What I expected to happen was...:
That at one point it would work again

What actually happened was...:
It constently crashes my game

Steps to Reproduce: (I dont know how to trigger it but I can tell you what I do that makes it act up)
1. Log into MineCraft 1.7.10 or lower
2. Join a server
3. Wait for it to load up, and it would crash

Extra Note: Reason I join 1.7 is the fact my favorite server is 1.7 and hasn't yet updated