From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Noah van der Aa <ndvdaa@gmail.com>
Date: Fri, 7 Jan 2022 11:58:26 +0100
Subject: [PATCH] Don't tick markers

Fixes https://github.com/PaperMC/Paper/issues/7276 by not adding markers to the entity
tick list at all and ignoring them in Spigot's activation range checks. The entity tick
list is only used in the tick and tickPassenger methods, so we can safely not add the
markers to it.

diff --git a/src/main/java/com/destroystokyo/paper/PaperCommand.java b/src/main/java/com/destroystokyo/paper/PaperCommand.java
index f7e223ddf21a90407f61351b89a98ac823932af7..3a8432f21e4520282f052d6d801a35b92bc82de0 100644
--- a/src/main/java/com/destroystokyo/paper/PaperCommand.java
+++ b/src/main/java/com/destroystokyo/paper/PaperCommand.java
@@ -629,7 +629,7 @@ public class PaperCommand extends Command {
                     ChunkPos chunk = e.chunkPosition();
                     info.left++;
                     info.right.put(chunk, info.right.getOrDefault(chunk, 0) + 1);
-                    if (!chunkProviderServer.isPositionTicking(e)) {
+                    if (!chunkProviderServer.isPositionTicking(e) || e instanceof net.minecraft.world.entity.Marker) { // Markers aren't ticked.
                         nonEntityTicking.merge(key, Integer.valueOf(1), Integer::sum);
                     }
                 });
diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index c4fb20953a6b21759c50bf8fdbc24dc71bc42e54..c8294d999cdce92b4747f1e6fbbed7fcb90ce8df 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -2492,6 +2492,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
         }
 
         public void onTickingStart(Entity entity) {
+            if (entity instanceof net.minecraft.world.entity.Marker) return; // Paper - Don't tick markers
             ServerLevel.this.entityTickList.add(entity);
             ServerLevel.this.entityManager.addNavigatorsIfPathingToRegion(entity); // Paper - optimise notify
         }
diff --git a/src/main/java/org/spigotmc/ActivationRange.java b/src/main/java/org/spigotmc/ActivationRange.java
index 5bffc9a0f6ef9d54abb359565d07509b177c2b82..1a1a1f4d0ac025daccc2d3f84faf6592819f4d5c 100644
--- a/src/main/java/org/spigotmc/ActivationRange.java
+++ b/src/main/java/org/spigotmc/ActivationRange.java
@@ -211,7 +211,7 @@ public class ActivationRange
             // Paper end
 
             // Paper start
-            java.util.List<Entity> entities = world.getEntities((Entity)null, maxBB, null);
+            java.util.List<Entity> entities = world.getEntities((Entity)null, maxBB, (e) -> !(e instanceof net.minecraft.world.entity.Marker)); // Don't tick markers
             for (int i = 0; i < entities.size(); i++) {
                 Entity entity = entities.get(i);
                 ActivationRange.activateEntity(entity);