I am having an issue with trying to use the mouse scroll wheel in an Applied Energistics crafting terminal. Everytime I try to scroll while the mouse is in the middle of the screen the game crashes. Happens on server and single player. Happens on multiple computers.

This is from a player who plays my modpack after looking at the crash report i think its a compatibility issues with this mod and AE2.[edit after posting this on itemscroller Github i was told its a issue with this Mod

Minecraft 1.15.2
Forge 31.2.36
appliedenergistics2-7.0.1
itemscroller-forge-1.15.2-0.15.0-dev.20200412.215325
https://pastebin.com/KQT20GqL
for reference maruohon/itemscroller#41

Huh. This is a bug that was introduced in 2017 (1.12). Weird.

Technically this is a bug in Forge. There are absolutely no details about it having to be backed by an IItemHandler and that null is not valid. Or it is and they except to wrap everything into a specific call, which would evaluate to false, but also will not mention it anywhere. So this really needs some clarification from upstream.

As far as I can remember, we actually make use of this subclass of Slot quite heavily and having SlotME extend is is purely convenience as it would otherwise require a massive amount of instanceof checks.
Also we cannot really provide a fully IItemHandler compatible approach as the inventories are not clientside and would have to wrap around a blocking server request. Handling this at a Container/Screen level is fine, but slots are not aware of it.

We could maybe use a NullItemHandler, but that can introduce a bunch of bugs by no longer using null and some code paths could then pick the IItemHandler aproach instead of the methods we actually override.