From 5ac412f2561c1d915e732763ec3602ff89f54c84 Mon Sep 17 00:00:00 2001
From: Zsomi <zsomidev@gmail.com>
Date: Tue, 19 May 2026 08:00:03 +0200
Subject: [PATCH] Fix NPE in BlockRewriter1_20_2 when block entity has null tag

---
 .../protocol/v1_20_2to1_20/rewriter/BlockRewriter1_20_2.java   | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/rewriter/BlockRewriter1_20_2.java b/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/rewriter/BlockRewriter1_20_2.java
index 5e299762..e840c2f7 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/rewriter/BlockRewriter1_20_2.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/rewriter/BlockRewriter1_20_2.java
@@ -41,6 +41,9 @@ public BlockRewriter1_20_2(final Protocol<ClientboundPackets1_20_2, ?, ?, ?> pro
     @Override
     public void handleBlockEntity(final UserConnection connection, final BlockEntity blockEntity) {
         final CompoundTag tag = blockEntity.tag();
+        if (tag == null) {
+            return;
+        }
         final Tag primaryEffect = tag.remove("primary_effect");
         if (primaryEffect instanceof StringTag) {
             final String effectKey = Key.stripMinecraftNamespace(((StringTag) primaryEffect).getValue());