AFFECTS 1.7 VERSIONS. I am trying to log into my favorite server Hydra HCF (HyraPvP.com). I load up minecraft fine with a 1.7.10 or 1.7.9 client but when I log into the server the game crashes. Crash error: // Why did you do that?

Put the summary of the bug you're having here

*What I expected to happen was to log into the server and have fun playing it with my friends.
Describe what you thought should happen here

*What actually happened was the game "unexpectedly" crashed.
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. Load minecraft up.
3.Choose a 1.7 version. (NOT MODDED)
4) Start minecraft up.
5) Enter multiplayer.
6) Click Hydra HCF.
7) The game crashes. Crash: // Why did you do that?