From 0e5163d49b0f3e4f8f0db6d6c65afd55256e7487 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 12 May 2016 01:55:17 -0400
Subject: [PATCH] Fix chunk unload leak issues due to neighbor updates


diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
index 8ee8e80..694f3d5 100644
--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -78,6 +78,12 @@ public class ChunkProviderServer implements IChunkProvider {
         }
 
     }
+    // Paper start
+    @Nullable
+    public Chunk getLoadedChunkAtWithoutMarkingActive(int i, int j) {
+        return this.chunks.get(ChunkCoordIntPair.a(i, j));
+    }
+    // Paper end
 
     @Nullable
     public Chunk getLoadedChunkAt(int i, int j) {
@@ -197,7 +203,7 @@ public class ChunkProviderServer implements IChunkProvider {
                         continue;
                     }
 
-                    Chunk neighbor = this.getLoadedChunkAt(chunk.locX + x, chunk.locZ + z);
+                    Chunk neighbor = this.getLoadedChunkAtWithoutMarkingActive(chunk.locX + x, chunk.locZ + z); // Paper
                     if (neighbor != null) {
                         neighbor.setNeighborLoaded(-x, -z);
                         chunk.setNeighborLoaded(x, z);
@@ -318,7 +324,7 @@ public class ChunkProviderServer implements IChunkProvider {
                                     continue;
                                 }
 
-                                Chunk neighbor = this.chunks.get(ChunkCoordIntPair.a(chunk.locX + x, chunk.locZ + z));
+                                Chunk neighbor = this.getLoadedChunkAtWithoutMarkingActive(chunk.locX + x, chunk.locZ + z); // Paper
                                 if (neighbor != null) {
                                     neighbor.setNeighborUnloaded(-x, -z);
                                     chunk.setNeighborUnloaded(x, z);
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 1adfc03..8246964 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -241,7 +241,7 @@ public class CraftWorld implements World {
                     continue;
                 }
 
-                net.minecraft.server.Chunk neighbor = world.getChunkProviderServer().getLoadedChunkAt(chunk.locX + x, chunk.locZ + z);
+                net.minecraft.server.Chunk neighbor = world.getChunkProviderServer().getLoadedChunkAtWithoutMarkingActive(chunk.locX + x, chunk.locZ + z); // Paper
                 if (neighbor != null) {
                     neighbor.setNeighborUnloaded(-xx, -zz);
                     chunk.setNeighborUnloaded(xx, zz);
@@ -328,7 +328,7 @@ public class CraftWorld implements World {
                         continue;
                     }
 
-                    net.minecraft.server.Chunk neighbor = world.getChunkProviderServer().getLoadedChunkAt(chunk.locX + x, chunk.locZ + z);
+                    net.minecraft.server.Chunk neighbor = world.getChunkProviderServer().getLoadedChunkAtWithoutMarkingActive(chunk.locX + x, chunk.locZ + z); // Paper
                     if (neighbor != null) {
                         neighbor.setNeighborLoaded(-x, -z);
                         chunk.setNeighborLoaded(x, z);
diff --git a/src/main/java/org/bukkit/craftbukkit/chunkio/ChunkIOProvider.java b/src/main/java/org/bukkit/craftbukkit/chunkio/ChunkIOProvider.java
index 7b61b14..a1668e2 100644
--- a/src/main/java/org/bukkit/craftbukkit/chunkio/ChunkIOProvider.java
+++ b/src/main/java/org/bukkit/craftbukkit/chunkio/ChunkIOProvider.java
@@ -62,7 +62,7 @@ class ChunkIOProvider implements AsynchronousExecutor.CallBackProvider<QueuedChu
                     continue;
                 }
 
-                Chunk neighbor = queuedChunk.provider.getLoadedChunkAt(chunk.locX + x, chunk.locZ + z);
+                Chunk neighbor = queuedChunk.provider.getLoadedChunkAtWithoutMarkingActive(chunk.locX + x, chunk.locZ + z); // Paper
                 if (neighbor != null) {
                     neighbor.setNeighborLoaded(-x, -z);
                     chunk.setNeighborLoaded(x, z);
-- 
2.8.2