1.7.9 crash report

1.7.9 Crash Report

What I expected to happen was...:
I was to going on my server. The server have the Version 1.7.9 for Bukkit.
But then crash it up

What actually happened was...:

Steps to Reproduce:
1. Start Minecraft Luncher
2. Go in Multyplayer
3. In loggin, in my server( Version 1.7.9 Bukkit)
4. Than crash
5. Then i was on the Luncher