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Paper/Spigot-Server-Patches/0335-Ensure-chunks-are-always-loaded-on-hard-position-set.patch
Aikar d37d04a52f
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2018-09-03 12:31:32 -04:00

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From 19265f90b53f78867e779c8cea4b237694e462d3 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 16 Aug 2018 17:36:41 -0400
Subject: [PATCH] Ensure chunks are always loaded on hard position sets
Player Movement, Entity Creation and Teleportation move
entities with a very "You are here, no debate" change, making
the server register them as there, regardless if that chunk was
loaded or not.
It appears possible that with hack clients and lag, a player
may be able to move fast enough to move into an unloaded
chunk and get into a buggy state.
To prevent this, we will ensure a chunk is always loaded,
guaranteeing that the entity will be properly registered
into its new home comfortably.
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index 2f87439c47..4252e8c02a 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -1364,6 +1364,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
this.lastYaw -= 360.0F;
}
+ world.getChunkAt((int) Math.floor(this.locX) >> 4, (int) Math.floor(this.locZ) >> 4); // Paper - ensure chunk is always loaded
this.setPosition(this.locX, this.locY, this.locZ);
this.setYawPitch(f, f1);
}
--
2.18.0