[1.10.2-2.0.1] Wither Boss explosion in the Nether crashes server

[RealGrep]

Spawned a wither boss in the nether. As he became vulnerable after the flashing thing he does, and as he did his initial explosion, the entire server crashed.

Crash log: http://pastebin.com/14MSWnyQ

This is with MC 1.10.2 and Forge CreeperHeal 2.0.1 (latest at this time), and Forge version 2093.

Let me know if you need any more information, want me to test something, etc. Thanks! :)

EDIT: Same thing happened with a Natura Nitro Creeper.

[RedRelay]

I'm on it, sorry I just seen your issue today.
I'll try to fix it as quick as possible
thanks for your report

[RedRelay]

You are not alone having a similar crash with this part of code. Usually, it's happens when you use other mods and other mod's block are not correctly registred. Do you use other mods ? If yes, which mods ?

[RealGrep]

Sorry for the massive time delay there. But yes, it's my mod pack: https://minecraft.curseforge.com/projects/quasar-core

That was with v0.6.1. Couldn't begin to speculate as to what mod might have an issue registering its blocks.

EDIT: Actually, since it happened in the nether only, that narrows it down a bit. Natura would be the first that occurs to me. Other than that, Tinkers' Construct does add ores, but my bet is, if that's the issue, that it's Natura.