From 1486672b8a0b2145f075de4bb2cf6a059d012c14 Mon Sep 17 00:00:00 2001
From: CraftBukkit/Spigot <noreply+git-craftbukkit@papermc.io>
Date: Thu, 7 Apr 2011 13:06:55 -0400
Subject: [PATCH] Fixed firstEmpty() by making it search for the first null
 instead of Material.AIR.

By: EvilSeph <evilseph@unaligned.org>
---
 .../org/bukkit/craftbukkit/inventory/CraftInventory.java  | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/paper-server/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventory.java b/paper-server/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventory.java
index 36ecb11a1f..1f5f9a0968 100644
--- a/paper-server/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventory.java
+++ b/paper-server/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventory.java
@@ -173,7 +173,13 @@ public class CraftInventory implements org.bukkit.inventory.Inventory {
     }
 
     public int firstEmpty() {
-        return first(Material.AIR);
+        ItemStack[] inventory = getContents();
+        for (int i = 0; i < inventory.length; i++) {
+            if (inventory[i] == null) {
+                return i;
+            }
+        }
+        return -1;
     }
 
     public int firstPartial(int materialId) {