The bug
When combining items in the inventory with shift-double click there need to be free slot(s) in the hotbar according to the number of the resulting stacks.
Visually the items are in fact "parked" for a short time in the hotbar.
How to reproduce
Scenario A
Fill your hotbar with any item(s)
Have some item spread over the survival inventory, but less than one stack in sum
Pick up one of those item
Shift double click on another item of the same kind
→ Clicked item will not combine to complete stack
Scenario B
Fill your hotbar except one slot with any item(s)
Have some item spread over the survival inventory, but more than one stack in sum
Pick up one of those item
Shift double click on another item of the same kind
→ Clicked item will not combine to complete stack
Linked issues
discovered while testing 1
relates to 2
Attachments
Comments 20
Cannot reproduce in 1.7.2, 1.7.9 or the latest snapshot (14w19a), so it appears to have been fixed at some point.
Hmmm... It works for pulling items out of an inventory, such as a crafting table. And it works for putting items in an inventory, such as a chest. It just doesn't work when there's nowhere to put the items, i.e., only opening the player inventory, or trying to rearrange items in the player's inventory at a crafting table. However, double-clicking (without holding shift) still gathers items from all open inventories onto the cursor.
I guess I wasn't aware of this particular use of the feature. With just the player inventory open, I'd have expected shift-double-click on an item in the inventory to collect items in an open hotbar slot, rather compacting them in the inventory. Which I supposed was the expected behavior in MC-19232. I think it's more likely that the items moving back into the inventory, rather than staying in the hotbar, is a bug.
To me, it sounds like shift-double clicking is not meant to gather items, it's meant to move all items of a certain kind as if they were each shift-clicked individually. See MC-19232, which i will now reopen.
Confirmed.