In Minecraft 15w38b I have found a bug where when in a crafting table or furnace and holding shift then pressing right click to quickly put items in your inventory, if you have no space in your inventor the item you shift clicked will disapear.

What should of happened was the item should of stayed in the crafting table or furnace when i shift clicked because my inventory was full

When I held down shift and right clicked in a furnace or crafting table my items disapeared

Steps to Reproduce:
1. Make sure your inventory is full of space with no room
2.go to a furnace with items in it
3.Hold shift and right click to quickly put it into your inventory and it should disapear