From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 2 Apr 2020 17:16:48 -0400
Subject: [PATCH] Don't tick dead players

Causes sync chunk loads and who knows what all else.
This is safe because Spectators are skipped in unloaded chunks too in vanilla.

diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index 5b5a0c0db79452ee07c40bf7693b6701dbe0b615..2822d493500dcd01c26ff5b205da83d8d356e119 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -637,7 +637,7 @@ public class ServerPlayer extends Player {
 
     public void doTick() {
         try {
-            if (!this.isSpectator() || !this.touchingUnloadedChunk()) {
+            if (valid && !this.isSpectator() || !this.touchingUnloadedChunk()) { // Paper - don't tick dead players that are not in the world currently (pending respawn)
                 super.tick();
             }