From 80ad0034e5f2a575baacc12b988f8beb51a5d4ba Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Wed, 29 May 2019 04:01:22 +0100
Subject: [PATCH] ChunkMapDistance CME


diff --git a/src/main/java/net/minecraft/server/ChunkMapDistance.java b/src/main/java/net/minecraft/server/ChunkMapDistance.java
index ed4e8d69ca..cd18150488 100644
--- a/src/main/java/net/minecraft/server/ChunkMapDistance.java
+++ b/src/main/java/net/minecraft/server/ChunkMapDistance.java
@@ -36,7 +36,7 @@ public abstract class ChunkMapDistance {
     private final ChunkMapDistance.a e = new ChunkMapDistance.a();
     private final ChunkMapDistance.b f = new ChunkMapDistance.b(8);
     private final ChunkMapDistance.c g = new ChunkMapDistance.c(33);
-    private final Set<PlayerChunk> h = Sets.newHashSet();
+    private Set<PlayerChunk> h = Sets.newHashSet(); // Paper - -final
     private final PlayerChunk.c i;
     private final Mailbox<ChunkTaskQueueSorter.a<Runnable>> j;
     private final Mailbox<ChunkTaskQueueSorter.b> k;
@@ -98,8 +98,12 @@ public abstract class ChunkMapDistance {
             ;
         }
 
-        if (!this.h.isEmpty()) {
-            this.h.forEach((playerchunk) -> {
+        // Paper start
+        Set<PlayerChunk> currentPending = this.h;
+        this.h = Sets.newHashSet();
+        if (!currentPending.isEmpty()) {
+            currentPending.forEach((playerchunk) -> {
+                // Paper end
                 playerchunk.a(playerchunkmap);
             });
             this.h.clear();
-- 
2.22.0