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Paper-Old/Spigot-Server-Patches/0272-Prevent-Saving-Bad-entities-to-chunks.patch
2019-04-30 15:51:03 -07:00

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From de82f12fa592c1bfcfb3a948dfedf4f2dc54130e Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 26 Jul 2018 00:11:12 -0400
Subject: [PATCH] Prevent Saving Bad entities to chunks
See https://github.com/PaperMC/Paper/issues/1223
Minecraft is saving invalid entities to the chunk files.
Avoid saving bad data, and also make improvements to handle
loading these chunks. Any invalid entity will be instant killed,
so lets avoid adding it to the world...
This lets us be safer about the dupe UUID resolver too, as now
we can ignore instant killed entities and avoid risk of duplicating
an invalid entity.
This should reduce log occurrences of dupe uuid messages.
diff --git a/src/main/java/net/minecraft/server/ChunkRegionLoader.java b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
index 0fed039f3..2e9686b43 100644
--- a/src/main/java/net/minecraft/server/ChunkRegionLoader.java
+++ b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
@@ -304,6 +304,7 @@ public class ChunkRegionLoader {
NBTTagCompound nbttagcompound4;
Iterator iterator1;
+ java.util.List<Entity> toUpdate = new java.util.ArrayList<>(); // Paper
if (ichunkaccess.getChunkStatus().getType() == ChunkStatus.Type.LEVELCHUNK) {
Chunk chunk = (Chunk) ichunkaccess;
@@ -314,6 +315,16 @@ public class ChunkRegionLoader {
while (iterator2.hasNext()) {
Entity entity = (Entity) iterator2.next();
+ // Paper start
+ if ((int)Math.floor(entity.locX) >> 4 != chunk.getPos().x || (int)Math.floor(entity.locZ) >> 4 != chunk.getPos().z) {
+ LogManager.getLogger().warn(entity + " is not in this chunk, skipping save. This a bug fix to a vanilla bug. Do not report this to PaperMC please.");
+ toUpdate.add(entity);
+ continue;
+ }
+ if (entity.dead) {
+ continue;
+ }
+ // Paper end
nbttagcompound4 = new NBTTagCompound();
if (entity.d(nbttagcompound4)) {
@@ -322,6 +333,13 @@ public class ChunkRegionLoader {
}
}
}
+
+ // Paper start - move entities to the correct chunk
+ for (Entity entity : toUpdate) {
+ ((WorldServer)world).entityJoinedWorld(entity);
+ }
+ // Paper end
+
} else {
ProtoChunk protochunk = (ProtoChunk) ichunkaccess;
--
2.21.0