testserver/Spigot-Server-Patches/0579-Fix-CME-on-adding-a-passenger-in-CreatureSpawnEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: jmp <jasonpenilla2@me.com>
Date: Sun, 4 Oct 2020 19:55:25 -0700
Subject: [PATCH] Fix CME on adding a passenger in CreatureSpawnEvent


diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index ec3c6b20c87d253d07f70e8a8b9b909df3683b36..3309a3ea9dc895bc910238e10d993ff5f66d4240 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -3079,7 +3079,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
     }
 
     public Stream<Entity> cp() {
-        return Stream.concat(Stream.of(this), this.passengers.stream().flatMap(Entity::cp));
+        return Stream.concat(Stream.of(this), com.google.common.collect.ImmutableList.copyOf(this.passengers).stream().flatMap(Entity::cp)); // Paper
     }
 
     public boolean hasSinglePlayerPassenger() {