PaperMC/Spigot-Server-Patches/0325-Fix-sign-edit-memory-leak.patch

From 0000000000000000000000000000000000000000 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/network/PlayerConnection.java b/src/main/java/net/minecraft/server/network/PlayerConnection.java
index 54399a2f2d1d86b650e27f6a31dce89035e7aeba..b7b431a649c6bc3066c267783007eee4384d27bd 100644
--- a/src/main/java/net/minecraft/server/network/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/network/PlayerConnection.java
@@ -2852,7 +2852,7 @@ 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())) {
                 PlayerConnection.LOGGER.warn("Player {} just tried to change non-editable sign", this.player.getDisplayName().getString());
                 this.sendPacket(tileentity.getUpdatePacket()); // CraftBukkit
                 return;
diff --git a/src/main/java/net/minecraft/world/level/block/entity/TileEntitySign.java b/src/main/java/net/minecraft/world/level/block/entity/TileEntitySign.java
index ec550aaa4e7943af4ecdd2275f1f32c21edf770a..6d0fe58d7e574ce5189e1f7a8485060d60b466d9 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/TileEntitySign.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/TileEntitySign.java
@@ -30,6 +30,7 @@ public class TileEntitySign extends TileEntity implements ICommandListener { //
     private EntityHuman c;
     private final FormattedString[] g;
     private EnumColor color;
+    public java.util.UUID signEditor; // Paper
 
     public TileEntitySign() {
         super(TileEntityTypes.SIGN);
@@ -131,7 +132,10 @@ 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() {