Bug (Godot 4.3 beta 1): Can't move items in inventory, or from inventory to ItemSlot.

[kyle-wannacott]

Moving inventory items results in a crash.

Steps to reproduce: Drag and drop inventory item to a new position inside itself, or a ItemSlot/ other inventory.

Error:

I think you can check for false instead of null now; from patch notes (https://godotengine.org/article/dev-snapshot-godot-4-3-beta-1/):

Breaking changes:

• Freed objects are now different than null in comparison operators, and evaluate as falsy (GH-73896).

[peter-kish]

Yeah checking for false would fix the issue in 4.3 beta 1, but I'm afraid it would introduce potential issues in 4.2. So I just went with the is_instance_valid check, which should work in both versions.