Paper/patches/server/0885-Fix-NPE-in-SculkBloomEvent-world-access.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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Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Lulu13022002 <41980282+Lulu13022002@users.noreply.github.com>
Date: Fri, 20 Oct 2023 19:50:22 +0200
Subject: [PATCH] Fix NPE in SculkBloomEvent world access
diff --git a/src/main/java/net/minecraft/world/level/block/entity/SculkCatalystBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/SculkCatalystBlockEntity.java
index da81f76a2ee779ffedf9a02d91b5971004167725..4729befa12732a9fd65cce243b33b3b479026c41 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/SculkCatalystBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/SculkCatalystBlockEntity.java
@@ -35,9 +35,16 @@ public class SculkCatalystBlockEntity extends BlockEntity implements GameEventLi
public SculkCatalystBlockEntity(BlockPos pos, BlockState state) {
super(BlockEntityType.SCULK_CATALYST, pos, state);
this.catalystListener = new SculkCatalystBlockEntity.CatalystListener(state, new BlockPositionSource(pos));
- this.catalystListener.level = this.level; // CraftBukkit
}
+ // Paper start - Fix NPE in SculkBloomEvent world access
+ @Override
+ public void setLevel(Level level) {
+ super.setLevel(level);
+ this.catalystListener.sculkSpreader.level = level;
+ }
+ // Paper end - Fix NPE in SculkBloomEvent world access
+
public static void serverTick(Level world, BlockPos pos, BlockState state, SculkCatalystBlockEntity blockEntity) {
org.bukkit.craftbukkit.event.CraftEventFactory.sourceBlockOverride = blockEntity.getBlockPos(); // CraftBukkit - SPIGOT-7068: Add source block override, not the most elegant way but better than passing down a BlockPosition up to five methods deep.
blockEntity.catalystListener.getSculkSpreader().updateCursors(world, pos, world.getRandom(), true);
@@ -67,13 +74,12 @@ public class SculkCatalystBlockEntity extends BlockEntity implements GameEventLi
final SculkSpreader sculkSpreader;
private final BlockState blockState;
private final PositionSource positionSource;
- private Level level; // CraftBukkit
public CatalystListener(BlockState state, PositionSource positionSource) {
this.blockState = state;
this.positionSource = positionSource;
this.sculkSpreader = SculkSpreader.createLevelSpreader();
- this.sculkSpreader.level = this.level; // CraftBukkit
+ // this.sculkSpreader.level = this.level; // CraftBukkit // Paper - Fix NPE in SculkBloomEvent world access
}
@Override