What I expected to happen was...:
What I expected to happen was coal to be removed from furnace and into inventory. *Note: Tests were done, game crashes for most fuel sources, except for charcoal.

What actually happened was...:
Furnace was lit (does not matter what is being cooked/smelted) when coal was removed, the game crashes.

Steps to Reproduce:
1. Put something to cook or smelt into furnace.
2. Put more than one coal or other fuel source into furnace.
3. Furnace should light, then remove the extra coal.