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-rw-r--r--patches/server/0912-Throw-exception-on-world-create-while-being-ticked.patch48
1 files changed, 48 insertions, 0 deletions
diff --git a/patches/server/0912-Throw-exception-on-world-create-while-being-ticked.patch b/patches/server/0912-Throw-exception-on-world-create-while-being-ticked.patch
new file mode 100644
index 0000000000..51ec2101cb
--- /dev/null
+++ b/patches/server/0912-Throw-exception-on-world-create-while-being-ticked.patch
@@ -0,0 +1,48 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <[email protected]>
+Date: Tue, 22 Mar 2022 12:44:30 -0700
+Subject: [PATCH] Throw exception on world create while being ticked
+
+There are no plans to support creating worlds while worlds are
+being ticked themselvess.
+
+diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
+index c8d56947305c981a3268ce4ae3e975db350ceff2..da15a224b8b974e78b9d8d5f514229b3b2a5a63e 100644
+--- a/src/main/java/net/minecraft/server/MinecraftServer.java
++++ b/src/main/java/net/minecraft/server/MinecraftServer.java
+@@ -308,6 +308,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
+
+ public volatile Thread shutdownThread; // Paper
+ public volatile boolean abnormalExit = false; // Paper
++ public boolean isIteratingOverLevels = false; // Paper
+
+ public static <S extends MinecraftServer> S spin(Function<Thread, S> serverFactory) {
+ AtomicReference<S> atomicreference = new AtomicReference();
+@@ -1567,6 +1568,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
+ // Paper end
+ MinecraftTimings.timeUpdateTimer.stopTiming(); // Spigot // Paper
+
++ this.isIteratingOverLevels = true; // Paper
+ while (iterator.hasNext()) {
+ ServerLevel worldserver = (ServerLevel) iterator.next();
+ worldserver.hasPhysicsEvent = org.bukkit.event.block.BlockPhysicsEvent.getHandlerList().getRegisteredListeners().length > 0; // Paper
+@@ -1614,6 +1616,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
+ this.profiler.pop();
+ worldserver.explosionDensityCache.clear(); // Paper - Optimize explosions
+ }
++ this.isIteratingOverLevels = false; // Paper
+
+ this.profiler.popPush("connection");
+ MinecraftTimings.connectionTimer.startTiming(); // Spigot
+diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+index c3f15ee7505e82418d9659ba3cee4f807546e0db..8a248e34fce1e04de4460f98b7627df495c66af1 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
++++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+@@ -1135,6 +1135,7 @@ public final class CraftServer implements Server {
+ @Override
+ public World createWorld(WorldCreator creator) {
+ Preconditions.checkState(!console.levels.isEmpty(), "Cannot create additional worlds on STARTUP");
++ Preconditions.checkState(!this.console.isIteratingOverLevels, "Cannot create a world while worlds are being ticked"); // Paper
+ Validate.notNull(creator, "Creator may not be null");
+
+ String name = creator.name();