logged into a 1.7.9 server with 1.7.9's version enabled, and it crashed.

Put the summary of the bug you're having here

What I expected to happen was me logging into the server
Describe what you thought should happen here

What actually happened was I crashed
Describe what happened here

Steps to Reproduce:
1. Log into cegreen.mcph.co with 1.7.9 enabled
2. Crash