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.
Duplicate of MCPE-4879