cant_drop = 1 Does Not Prevent You From Moving an Item From One Hand to Another

Created by: Shadowmech88

I've tried to fix it by putting a check in put_in_hand_check() but for some reason, I can only get is_holding_item() to return a held_items index when the item in question is a child of /storage, like a box or a backpack.

Using this code:

if(W.cant_drop)
    var/I = is_holding_item(W)
    if(I)
        to_chat(src, "You can't pry \the [W] out of your [get_index_limb_name(I)]!")
        return 0

Somehow prevents me from switching a cant_drop = 1 storage item from one hand to the other just fine, yet every other type of item can be moved freely between hands.

I can't figure it out, maybe someone else can.

Also this is what's causing #8492 (closed).