Win7 x64
Dell Precision T3500
Xeon W3550
FirePro V5900
12GB RAM

MC and Forge versions in crash report

https://gist.github.com/janagyjr/916e2bd4393845a623c293a89ef7f6d2

I cannot log in, and I do not want to do a rollback if I can help it. This is on a VIP server. All I did was accidentally place water via a bucket next to a quarry.

Can you try either disabling any multi core rendering settings in optifine, or if that doesn't work removing it temporarily?

I can temp disable it, sure.

Reporting issue to optifine, first time I've ever had an issue with it.

Everything is going fine now (I also had an issue with the quarry stopping work for no reason, happened twice)