From d652ff68f27b2fae4428c9dca333c5566a886cf8 Mon Sep 17 00:00:00 2001
From: Noah van der Aa <ndvdaa@gmail.com>
Date: Fri, 1 Jul 2022 18:14:50 +0200
Subject: [PATCH] Don't allow world unloading while ticking worlds (fixes
 #8080) (#8081)

---
 ...row-exception-on-world-create-while-being-ticked.patch | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/patches/server/Throw-exception-on-world-create-while-being-ticked.patch b/patches/server/Throw-exception-on-world-create-while-being-ticked.patch
index 5eb47793a2..1a58a48530 100644
--- a/patches/server/Throw-exception-on-world-create-while-being-ticked.patch
+++ b/patches/server/Throw-exception-on-world-create-while-being-ticked.patch
@@ -46,3 +46,11 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          Validate.notNull(creator, "Creator may not be null");
  
          String name = creator.name();
+@@ -0,0 +0,0 @@ public final class CraftServer implements Server {
+ 
+     @Override
+     public boolean unloadWorld(World world, boolean save) {
++        Preconditions.checkState(!this.console.isIteratingOverLevels, "Cannot unload a world while worlds are being ticked"); // Paper
+         if (world == null) {
+             return false;
+         }