From f26e1b2e2925a53267f64d55226a0688e32229ac Mon Sep 17 00:00:00 2001
From: Josh Roy <10731363+JRoy@users.noreply.github.com>
Date: Sat, 22 Jul 2023 16:46:15 -0400
Subject: [PATCH] Fix invalid unlimited items preventing userdata to load

Invalid material names would previously return a null value
when deserializing. This raises an exception from within
Configurate because they use an EnumSet internally during
deserialization which doesn't support null elements.
---
 .../essentials/config/serializers/MaterialTypeSerializer.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Essentials/src/main/java/com/earth2me/essentials/config/serializers/MaterialTypeSerializer.java b/Essentials/src/main/java/com/earth2me/essentials/config/serializers/MaterialTypeSerializer.java
index 50e23157293..3fb5c1a5c12 100644
--- a/Essentials/src/main/java/com/earth2me/essentials/config/serializers/MaterialTypeSerializer.java
+++ b/Essentials/src/main/java/com/earth2me/essentials/config/serializers/MaterialTypeSerializer.java
@@ -17,7 +17,9 @@ public Material deserialize(Type type, Object obj) throws SerializationException
         if (obj instanceof String) {
             return Material.matchMaterial((String) obj);
         }
-        return null;
+
+        // Configurate will use an EnumSet to deserialize, which doesn't support null types. Default to air.
+        return Material.AIR;
     }
 
     @Override