From 4ab8912b680e90a54119d04b8020ca0e32d75ba8 Mon Sep 17 00:00:00 2001
From: u9g <winworkswow@gmail.com>
Date: Mon, 3 Jan 2022 23:32:42 -0500
Subject: [PATCH] Add missing IAE check for PersistentDataContainer#has

---
 .../craftbukkit/persistence/CraftPersistentDataContainer.java    | 1 +
 1 file changed, 1 insertion(+)

diff --git a/paper-server/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java b/paper-server/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java
index 3001bb0e3d..984e988a47 100644
--- a/paper-server/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java
+++ b/paper-server/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java
@@ -57,6 +57,7 @@ public class CraftPersistentDataContainer implements PersistentDataContainer {
 
     @Override
     public boolean has(NamespacedKey key) {
+        Preconditions.checkArgument(key != null, "The provided key for the custom value was null"); // Paper
         return this.customDataTags.get(key.toString()) != null;
     }