Put the summary of the bug you're having here

What I expected to happen was...:
I expected to have the furnace cook raw beef and make steak. I have done this using wood planks as fuel without issue but when I tried using coal . . .

What actually happened was...:
Game crashed and gave me the (2) attached error reports. I tried twice with the same result before submitting this ticket.

Steps to Reproduce:
1. Walked up to furnace and opened the interface
2. Placed 5 raw beef into the furnace
3. Added 1 lump of coal from partial stack via right click
4. Crash