Mac Direwolf20 Modpack Fatal Crash

[KingVanilla]

Hello everybody,

I was recently playing the Direwolf20 1.6.4 pack and when I placed down an energy cell next to some conduits from Thermal Expansion, my game crashed and my world is no longer showing up in the launcher, but is still on my computer. I was wondering if anybody would be kind enough to help me fix the problem, as I have put a lot of time and effort into this world. The Pastebin of my crash is included below.

http://pastebin.com/ic5bAN0i

Thanks!

KingVanilla

 

[Ashzification]

Please post in this format so that we have all of the information we initially need:


Operating System, bit type:
Java version/update, bit type:
Launcher version:
Completed the troubleshooting guide (y/n):
Console log, pastebin.com link:
Description of the problem: