PaperMC/patches/server/0998-Fix-NPE-for-Jukebox-setRecord.patch
Spottedleaf 8c5b837e05 Rework async chunk api implementation
Firstly, the old methods all routed to the CompletableFuture method.
However, the CF method could not guarantee that if the caller
was off-main that the future would be "completed" on-main. Since
the callback methods used the CF one, this meant that the callback
methods did not guarantee that the callbacks were to be called on
the main thread.

Now, all methods route to getChunkAtAsync(x, z, gen, urgent, cb)
so that the methods with the callback are guaranteed to invoke
the callback on the main thread. The CF behavior remains unchanged;
it may still appear to complete on main if invoked off-main.

Secondly, remove the scheduleOnMain invocation in the async
chunk completion. This unnecessarily delays the callback
by 1 tick.

Thirdly, add getChunksAtAsync(minX, minZ, maxX, maxZ, ...) which
will load chunks within an area. This method is provided as a helper
as keeping all chunks loaded within an area can be complicated to
implement for plugins (due to the lacking ticket API), and is
already implemented internally anyways.

Fourthly, remove the ticket addition that occured with getChunkAt
and getChunkAtAsync. The ticket addition may delay the unloading
of the chunk unnecessarily. It also fixes a very rare timing bug
where the future/callback would be completed after the chunk
unloads.
2024-11-18 23:00:59 -08:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Mon, 17 Jun 2024 17:41:09 -0700
Subject: [PATCH] Fix NPE for Jukebox#setRecord
Fallback to the global registry if no level exists
diff --git a/src/main/java/net/minecraft/world/level/block/entity/JukeboxBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/JukeboxBlockEntity.java
index 69fb6f5cfc8654995d7c78e8f7e9470b601e8ec7..c3bbe5e9e0cc37f3f22fc1d839fa2652966f1266 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/JukeboxBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/JukeboxBlockEntity.java
@@ -199,7 +199,7 @@ public class JukeboxBlockEntity extends BlockEntity implements ContainerSingleIt
public void setSongItemWithoutPlaying(ItemStack itemstack, long ticksSinceSongStarted) { // CraftBukkit - add argument
this.item = itemstack;
this.jukeboxSongPlayer.song = null; // CraftBukkit - reset
- JukeboxSong.fromStack(this.level.registryAccess(), itemstack).ifPresent((holder) -> {
+ JukeboxSong.fromStack(this.level != null ? this.level.registryAccess() : org.bukkit.craftbukkit.CraftRegistry.getMinecraftRegistry(), itemstack).ifPresent((holder) -> { // Paper - fallback to other RegistyrAccess if no level
this.jukeboxSongPlayer.setSongWithoutPlaying(holder, ticksSinceSongStarted); // CraftBukkit - add argument
});
// CraftBukkit start - add null check for level