Paper/Spigot-Server-Patches/0421-Fix-unregistering-entities-from-unloading-chunks.patch
jmp 1718f61bf8 Updated Upstream (CraftBukkit/Spigot)
Doesn't compile yet.

CraftBukkit Changes:
90d6905b Repackage NMS
69cf961d Repackage patches

Spigot Changes:
79d53c28 Repackage NMS
2021-03-18 18:03:22 +01:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Tue, 31 Mar 2020 03:01:45 -0400
Subject: [PATCH] Fix unregistering entities from unloading chunks
CraftBukkit caused a regression here by making unloading chunks not
have a ticket added and returning unloaded future.
This caused entities who were killed in same tick their chunk is unloading
to not be able to be removed from the chunk.
This then results in dead entities lingering in the Chunk.
Combine that with a buggy detail of the previous implementation of
the Dupe UUID patch, then this was the likely source of the "Ghost entities"
diff --git a/src/main/java/net/minecraft/server/level/WorldServer.java b/src/main/java/net/minecraft/server/level/WorldServer.java
index f493dcbe178149084afb5ae8002250c7de111c37..6f39f1a389b2e310780456bd7685fd9c4da31aae 100644
--- a/src/main/java/net/minecraft/server/level/WorldServer.java
+++ b/src/main/java/net/minecraft/server/level/WorldServer.java
@@ -1560,9 +1560,9 @@ public class WorldServer extends World implements GeneratorAccessSeed {
}
private void removeEntityFromChunk(Entity entity) {
- IChunkAccess ichunkaccess = chunkProvider.getChunkUnchecked(entity.chunkX, entity.chunkZ); // CraftBukkit - SPIGOT-5228: getChunkAt won't find the entity's chunk if it has already been unloaded (i.e. if it switched to state INACCESSIBLE).
+ Chunk ichunkaccess = entity.getCurrentChunk(); // Paper - getChunkAt(x,z,full,false) is broken by CraftBukkit as it won't return an unloading chunk. Use our current chunk reference as this points to what chunk they need to be removed from anyways
- if (ichunkaccess instanceof Chunk) {
+ if (ichunkaccess != null) { // Paper
((Chunk) ichunkaccess).b(entity);
}