Paper/Spigot-Server-Patches/0179-Don-t-load-Chunks-from-Hoppers-and-other-things.patch

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From ee5f4518088b9d58be983ccbcd6bf6e7309ff967 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 3 Nov 2016 20:28:12 -0400
Subject: [PATCH] Don't load Chunks from Hoppers and other things
Hoppers call this to I guess "get the primary side" of a double sided chest.
If the double sided chest crosses chunk lines, it causes the chunk to load.
This will end up causing sync chunk loads, which will unload with Chunk GC,
only to be reloaded again the next tick.
This of course is undesirable, so just return the loaded side as "primary"
and treat it as a single chest if the other sides are unloaded
diff --git a/src/main/java/net/minecraft/server/BlockChest.java b/src/main/java/net/minecraft/server/BlockChest.java
index a5f2fc0..71239cd 100644
--- a/src/main/java/net/minecraft/server/BlockChest.java
+++ b/src/main/java/net/minecraft/server/BlockChest.java
@@ -339,7 +339,13 @@ public class BlockChest extends BlockTileEntity {
while (iterator.hasNext()) {
EnumDirection enumdirection = (EnumDirection) iterator.next();
BlockPosition blockposition1 = blockposition.shift(enumdirection);
- Block block = world.getType(blockposition1).getBlock();
+ // Paper start - don't load chunks if the other side of the chest is in unloaded chunk
+ final IBlockData type = world.getTypeIfLoaded(blockposition1); // Paper
+ if (type == null) {
+ continue;
+ }
+ Block block = type.getBlock();
+ // Paper end
if (block == this) {
if (this.e(world, blockposition1)) {
--
2.10.2