PaperMC/patches/server/0966-Fix-creation-of-invalid-block-entity-during-world-ge.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Pierpaolo Coletta <p.coletta@glyart.com>
Date: Sat, 30 Mar 2024 21:06:10 +0100
Subject: [PATCH] Fix creation of invalid block entity during world generation


diff --git a/src/main/java/net/minecraft/server/level/WorldGenRegion.java b/src/main/java/net/minecraft/server/level/WorldGenRegion.java
index a59eece9c7a8c33cb8ce963906e993c3462684fb..333a02e08cccf5cb0efa2076582cbd69e95ff0c0 100644
--- a/src/main/java/net/minecraft/server/level/WorldGenRegion.java
+++ b/src/main/java/net/minecraft/server/level/WorldGenRegion.java
@@ -339,6 +339,7 @@ public class WorldGenRegion implements WorldGenLevel {
                         ichunkaccess.removeBlockEntity(pos);
                     }
                 } else {
+                    ichunkaccess.removeBlockEntity(pos); // Paper - Clear the block entity before setting up a DUMMY block entity
                     CompoundTag nbttagcompound = new CompoundTag();
 
                     nbttagcompound.putInt("x", pos.getX());
diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
index 744db9eec4f7bdeb32f83300960a7fce63b393d8..8de6ad8b131061b2dae440dff71e2e6e7af2de39 100644
--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
@@ -1071,9 +1071,14 @@ public class LevelChunk extends ChunkAccess {
                         if (this.blockEntity.getType().isValid(iblockdata)) {
                             this.ticker.tick(LevelChunk.this.level, this.blockEntity.getBlockPos(), iblockdata, this.blockEntity);
                             this.loggedInvalidBlockState = false;
-                        } else if (!this.loggedInvalidBlockState) {
-                            this.loggedInvalidBlockState = true;
-                            LevelChunk.LOGGER.warn("Block entity {} @ {} state {} invalid for ticking:", new Object[]{LogUtils.defer(this::getType), LogUtils.defer(this::getPos), iblockdata});
+                        // Paper start - Remove the Block Entity if it's invalid
+                        } else {
+                            LevelChunk.this.removeBlockEntity(this.getPos());
+                            if (!this.loggedInvalidBlockState) {
+                                this.loggedInvalidBlockState = true;
+                                LevelChunk.LOGGER.warn("Block entity {} @ {} state {} invalid for ticking:", new Object[]{LogUtils.defer(this::getType), LogUtils.defer(this::getPos), iblockdata});
+                            }
+                            // Paper end - Remove the Block Entity if it's invalid
                         }
 
                         gameprofilerfiller.pop();