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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Alfie Cleveland <alfeh@me.com>
Date: Tue, 27 Dec 2016 01:57:57 +0000
Subject: [PATCH] Properly fix item duplication bug

Credit to prplz for figuring out the real issue

diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index 532282ba4432f55596337f7a0898ecc3d5dc2148..82498ec7f0de4c1b82c7882824587ed3ba7fd5d6 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -2549,7 +2549,7 @@ public class ServerPlayer extends Player {
 
     @Override
     public boolean isImmobile() {
-        return super.isImmobile() || !this.getBukkitEntity().isOnline();
+        return super.isImmobile() || (this.connection != null && this.connection.isDisconnected()); // Paper - Fix duplication bugs
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
index 5f5d8ae29ff702eacc72341fae074a05d977e7cd..fc2fd0842e25fbe5c46ae07200c4b1a5950ae29a 100644
--- a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
@@ -178,7 +178,7 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
     }
 
     public final boolean isDisconnected() {
-        return !this.player.joining && !this.connection.isConnected();
+        return (!this.player.joining && !this.connection.isConnected()) || this.processedDisconnect; // Paper - Fix duplication bugs
     }
     // CraftBukkit end