From cca7c50e9fc328fc35543b8ea1d8f670ddca6829 Mon Sep 17 00:00:00 2001
From: Tamion <70228790+notTamion@users.noreply.github.com>
Date: Mon, 27 May 2024 00:03:48 +0200
Subject: [PATCH] Fix Cancelling BlockPlaceEvent calling onRemove (#10773)

---
 ...ing-BlockPlaceEvent-calling-onRemove.patch | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 patches/server/Fix-cancelling-BlockPlaceEvent-calling-onRemove.patch

diff --git a/patches/server/Fix-cancelling-BlockPlaceEvent-calling-onRemove.patch b/patches/server/Fix-cancelling-BlockPlaceEvent-calling-onRemove.patch
new file mode 100644
index 0000000000..adb8d4da1f
--- /dev/null
+++ b/patches/server/Fix-cancelling-BlockPlaceEvent-calling-onRemove.patch
@@ -0,0 +1,47 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Tamion <70228790+notTamion@users.noreply.github.com>
+Date: Thu, 23 May 2024 11:02:20 +0200
+Subject: [PATCH] Fix cancelling BlockPlaceEvent calling onRemove
+
+
+diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/item/ItemStack.java
++++ b/src/main/java/net/minecraft/world/item/ItemStack.java
+@@ -0,0 +0,0 @@ public final class ItemStack implements DataComponentHolder {
+                     world.capturedTileEntities.clear(); // Paper - Allow chests to be placed with NBT data; clear out block entities as chests and such will pop loot
+                     // revert back all captured blocks
+                     world.preventPoiUpdated = true; // CraftBukkit - SPIGOT-5710
++                    world.isBlockPlaceCancelled = true; // Paper - prevent calling cleanup logic when undoing a block place upon a cancelled BlockPlaceEvent
+                     for (BlockState blockstate : blocks) {
+                         blockstate.update(true, false);
+                     }
++                    world.isBlockPlaceCancelled = false; // Paper - prevent calling cleanup logic when undoing a block place upon a cancelled BlockPlaceEvent
+                     world.preventPoiUpdated = false;
+ 
+                     // Brute force all possible updates
+diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/Level.java
++++ b/src/main/java/net/minecraft/world/level/Level.java
+@@ -0,0 +0,0 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
+     public boolean preventPoiUpdated = false; // CraftBukkit - SPIGOT-5710
+     public boolean captureBlockStates = false;
+     public boolean captureTreeGeneration = false;
++    public boolean isBlockPlaceCancelled = false; // Paper - prevent calling cleanup logic when undoing a block place upon a cancelled BlockPlaceEvent
+     public Map<BlockPos, org.bukkit.craftbukkit.block.CraftBlockState> capturedBlockStates = new java.util.LinkedHashMap<>(); // Paper
+     public Map<BlockPos, BlockEntity> capturedTileEntities = new java.util.LinkedHashMap<>(); // Paper - Retain block place order when capturing blockstates
+     public List<ItemEntity> captureDrops;
+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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
++++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
+@@ -0,0 +0,0 @@ public class LevelChunk extends ChunkAccess {
+ 
+                 boolean flag3 = iblockdata1.hasBlockEntity();
+ 
+-                if (!this.level.isClientSide) {
++                if (!this.level.isClientSide && !this.level.isBlockPlaceCancelled) { // Paper - prevent calling cleanup logic when undoing a block place upon a cancelled BlockPlaceEvent
+                     iblockdata1.onRemove(this.level, blockposition, iblockdata, flag);
+                 } else if (!iblockdata1.is(block) && flag3) {
+                     this.removeBlockEntity(blockposition);