Affects Version/s: Minecraft 15w45a
Fix Version/s: None
Environment:Windows 7 / Java 7 Update 67
Introduction: The bug is when you get a item and do the fast swap, the item lose the existence. You cant place it, you cant craft it, only if you press E again. (Only works on hotbar o think)
1. Get a random item.
2. Press E and put your mouse on it.
3. Press a number of other hotbar slot.
4. Close the inventory.
5. Now try to place this block, try to drop this block. You cant.
6. Now press E again.
7. Close the inventory.
8. Now you can place it, drop it and do the normal stuff.