fix: OnContextMenuOpening crash with empty bag and bank slots

Intersect.Client.Core/Interface/Game/Bag/BagItem.cs

@@ -56,18 +56,30 @@ public BagItem(BagWindow bagWindow, Base parent, int index, ContextMenu contextM
 
     protected override void OnContextMenuOpening(ContextMenu contextMenu)
     {
+        contextMenu.ClearChildren();
+
         if (Globals.BagSlots is not { Length: > 0 } bagSlots)
         {
             return;
         }
 
-        if (!ItemDescriptor.TryGet(bagSlots[SlotIndex].ItemId, out var item))
+        var slotIndex = SlotIndex;
+
+        if (slotIndex >= bagSlots.Length)
+        {
+            return;
+        }
+
+        if (bagSlots[slotIndex] is not { } bagSlot)
+        {
+            return;
+        }
+
+        if (!ItemDescriptor.TryGet(bagSlot.ItemId, out var item))
         {
             return;
         }
 
-        // Clear the context menu and add the withdraw item with updated item name
-        contextMenu.ClearChildren();
         _withdrawContextItem.SetText(Strings.BagContextMenu.Withdraw.ToString(item.Name));
         contextMenu.AddChild(_withdrawContextItem);
         base.OnContextMenuOpening(contextMenu);

Intersect.Client.Core/Interface/Game/Bank/BankItem.cs

@@ -59,21 +59,33 @@ public BankItem(BankWindow bankWindow, Base parent, int index, ContextMenu conte
 
     protected override void OnContextMenuOpening(ContextMenu contextMenu)
     {
+        contextMenu.ClearChildren(); // Clear context menu
+
         if (Globals.BankSlots is not { Length: > 0 } bankSlots)
         {
             return;
         }
 
-        if (!ItemDescriptor.TryGet(bankSlots[SlotIndex].ItemId, out var item))
+        var slotIndex = SlotIndex;
+
+        if (slotIndex >= bankSlots.Length)
         {
             return;
         }
 
-        // Clear the context menu and add the withdraw item with updated item name
-        contextMenu.ClearChildren();
-        contextMenu.AddChild(_withdrawContextItem);
-        _withdrawContextItem.SetText(Strings.BankContextMenu.Withdraw.ToString(item.Name));
+        if (bankSlots[slotIndex] is not { } bankSlot)
+        {
+            return;
+        }
 
+        if (!ItemDescriptor.TryGet(bankSlot.ItemId, out var item))
+        {
+            return;
+        }
+
+        // Update context menu
+        _withdrawContextItem.SetText(Strings.BankContextMenu.Withdraw.ToString(item.Name));
+        contextMenu.AddChild(_withdrawContextItem);
         base.OnContextMenuOpening(contextMenu);
     }