From 0d147653f32caf064518ccd06a787d9f00000a37 Mon Sep 17 00:00:00 2001
From: Nassim Jahnke <nassim@njahnke.dev>
Date: Thu, 10 Aug 2023 17:13:08 +1000
Subject: [PATCH] Fix spawn tracker mapping data check

---
 .../viaversion/viabackwards/api/rewriters/EntityRewriter.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/common/src/main/java/com/viaversion/viabackwards/api/rewriters/EntityRewriter.java b/common/src/main/java/com/viaversion/viabackwards/api/rewriters/EntityRewriter.java
index ac7d96de..272e8964 100644
--- a/common/src/main/java/com/viaversion/viabackwards/api/rewriters/EntityRewriter.java
+++ b/common/src/main/java/com/viaversion/viabackwards/api/rewriters/EntityRewriter.java
@@ -90,6 +90,10 @@ public abstract class EntityRewriter<C extends ClientboundPacketType, T extends
 
     public PacketHandler getSpawnTrackerWithDataHandler1_19(EntityType fallingBlockType) {
         return wrapper -> {
+            if (protocol.getMappingData() == null) {
+                return;
+            }
+
             // Check against the UNMAPPED entity type
             EntityType entityType = trackAndMapEntity(wrapper);
             if (entityType == fallingBlockType) {