Paper/patches/server/0856-Fix-NPE-on-Boat-getStatus.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: LemonCaramel <admin@caramel.moe>
Date: Mon, 10 Apr 2023 20:48:26 +0900
Subject: [PATCH] Fix NPE on Boat getStatus
Boat status is null until the entity is added to the world and the tick() method is called.
== AT ==
public net.minecraft.world.entity.vehicle.AbstractBoat getStatus()Lnet/minecraft/world/entity/vehicle/AbstractBoat$Status;
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftBoat.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftBoat.java
index 5d51a49228eaee94f91cd04843e27c7918ca8796..ff82dc98478a8ac564bdbf4ec58da612e5f6c2ce 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftBoat.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftBoat.java
@@ -87,6 +87,17 @@ public abstract class CraftBoat extends CraftVehicle implements Boat {
@Override
public Status getStatus() {
+ // Paper start - Fix NPE on Boat getStatus
+ final net.minecraft.world.entity.vehicle.AbstractBoat handle = this.getHandle();
+ if (handle.status == null) {
+ if (handle.valid) {
+ // Don't actually set the status because it would skew the old status check in the next tick
+ return CraftBoat.boatStatusFromNms(handle.getStatus());
+ } else {
+ return Status.NOT_IN_WORLD;
+ }
+ }
+ // Paper end - Fix NPE on Boat getStatus
return CraftBoat.boatStatusFromNms(this.getHandle().status);
}