From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 3 Apr 2016 17:48:50 -0400
Subject: [PATCH] Fix Cancelling BlockPlaceEvent triggering physics


diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index f05dcb3c9f17a0aa991fcbd3b3f58f507059a8cd..c028b74f4a6c5e52be48b042f44fe4b98466382b 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -542,6 +542,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
     public void setBlocksDirty(BlockPos pos, BlockState old, BlockState updated) {}
 
     public void updateNeighborsAt(BlockPos pos, Block block) {
+        if (captureBlockStates) { return; } // Paper - Cancel all physics during placement
         this.neighborChanged(pos.west(), block, pos);
         this.neighborChanged(pos.east(), block, pos);
         this.neighborChanged(pos.below(), block, pos);