From e776f5ab14aa0c2cf5e54dee68753ae4d7f1cf13 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 28 Feb 2019 00:15:28 -0500
Subject: [PATCH] Fix sign edit memory leak

when a player edits a sign, a reference to their Entity is never cleand up.

diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
index 98d1138cb..b3f1fb9eb 100644
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
@@ -2565,7 +2565,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
 
             TileEntitySign tileentitysign = (TileEntitySign) tileentity;
 
-            if (!tileentitysign.d() || tileentitysign.f() != this.player) {
+            if (!tileentitysign.d() || tileentitysign.signEditor == null || !tileentitysign.signEditor.equals(this.player.getUniqueID())) {
                 this.minecraftServer.warning("Player " + this.player.getDisplayName().getString() + " just tried to change non-editable sign");
                 this.sendPacket(tileentity.getUpdatePacket()); // CraftBukkit
                 return;
diff --git a/src/main/java/net/minecraft/server/TileEntitySign.java b/src/main/java/net/minecraft/server/TileEntitySign.java
index 15b3add9e..caeaca4c7 100644
--- a/src/main/java/net/minecraft/server/TileEntitySign.java
+++ b/src/main/java/net/minecraft/server/TileEntitySign.java
@@ -17,6 +17,7 @@ public class TileEntitySign extends TileEntity implements ICommandListener { //
     // Paper start - Strip invalid unicode from signs on load
     private static final boolean keepInvalidUnicode = Boolean.getBoolean("Paper.keepInvalidUnicode"); // Allow people to keep their bad unicode if they really want it
     private boolean privateUnicodeRemoved = false;
+    public java.util.UUID signEditor;
     // Paper end
 
     public TileEntitySign() {
@@ -141,7 +142,10 @@ public class TileEntitySign extends TileEntity implements ICommandListener { //
     }
 
     public void a(EntityHuman entityhuman) {
-        this.j = entityhuman;
+        // Paper start
+        //this.g = entityhuman;
+        signEditor = entityhuman != null ? entityhuman.getUniqueID() : null;
+        // Paper end
     }
 
     public EntityHuman f() {
-- 
2.21.0