From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 28 Jun 2020 19:36:55 -0400
Subject: [PATCH] Don't allow null UUID's for chat


diff --git a/src/main/java/net/minecraft/server/PacketPlayOutChat.java b/src/main/java/net/minecraft/server/PacketPlayOutChat.java
index 18528c792ae12bd8753e8529f4b73b76407e67dc..f7019e874ae4d654fad115de80c307287ad180f3 100644
--- a/src/main/java/net/minecraft/server/PacketPlayOutChat.java
+++ b/src/main/java/net/minecraft/server/PacketPlayOutChat.java
@@ -16,7 +16,7 @@ public class PacketPlayOutChat implements Packet<PacketListenerPlayOut> {
     public PacketPlayOutChat(IChatBaseComponent ichatbasecomponent, ChatMessageType chatmessagetype, UUID uuid) {
         this.a = ichatbasecomponent;
         this.b = chatmessagetype;
-        this.c = uuid;
+        this.c = uuid != null ? uuid : SystemUtils.getNullUUID(); // Paper
     }
 
     @Override