From e729c9455cc36e96c1570bb5fbc0e709ec96a044 Mon Sep 17 00:00:00 2001
From: Fernando Pettinelli <fernandopettinelli@l3tplay.com>
Date: Sat, 16 Oct 2021 21:25:16 -0300
Subject: [PATCH] Check if material is AIR.

---
 src/main/java/com/songoda/ultimatestacker/UltimateStacker.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main/java/com/songoda/ultimatestacker/UltimateStacker.java b/src/main/java/com/songoda/ultimatestacker/UltimateStacker.java
index 5756dd8..29933c2 100644
--- a/src/main/java/com/songoda/ultimatestacker/UltimateStacker.java
+++ b/src/main/java/com/songoda/ultimatestacker/UltimateStacker.java
@@ -411,6 +411,9 @@ public class UltimateStacker extends SongodaPlugin {
 
     public static void updateItemMeta(Item item, ItemStack itemStack, int newAmount) {
         Material material = itemStack.getType();
+        if (material == Material.AIR)
+            return;
+
         String name = TextUtils.convertToInvisibleString("IS") + Methods.compileItemName(itemStack, newAmount);
 
         boolean blacklisted = isMaterialBlacklisted(itemStack);