From f0ae31c519bfef05b81bac120398101448cbe471 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 4b3ddfd990..2c94ca6a8e 100644
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
@@ -2546,7 +2546,7 @@ 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 03f6ddf000..a934020190 100644
--- a/src/main/java/net/minecraft/server/TileEntitySign.java
+++ b/src/main/java/net/minecraft/server/TileEntitySign.java
@@ -10,6 +10,7 @@ public class TileEntitySign extends TileEntity implements ICommandListener { //
     private EntityHuman c;
     private final String[] g = new String[4];
     private EnumColor color;
+    public java.util.UUID signEditor; // Paper
 
     public TileEntitySign() {
         super(TileEntityTypes.SIGN);
@@ -108,7 +109,10 @@ public class TileEntitySign extends TileEntity implements ICommandListener { //
     }
 
     public void a(EntityHuman entityhuman) {
-        this.c = entityhuman;
+        // Paper start
+        //this.c = entityhuman;
+        signEditor = entityhuman != null ? entityhuman.getUniqueID() : null;
+        // Paper end
     }
 
     public EntityHuman f() {
-- 
2.26.2