PaperMC/patches/server/0336-Don-t-tick-dead-players.patch

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 d63c940012a04fcf7a45804ce2b77293d5d194ce..dfc7f6c15951dc3dfdfadba67b949cd265abc4ca 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -767,7 +767,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.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();
             }