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geforkt von Mirrors/Paper
Paper/patches/server/0866-Fix-NPE-on-Boat-getStatus.patch
Bjarne Koll c5a10665b8
Remove wall-time / unused skip tick protection (#11412)
Spigot still maintains some partial implementation of "tick skipping", a
practice in which the MinecraftServer.currentTick field is updated not
by an increment of one per actual tick, but instead set to
System.currentTimeMillis() / 50. This behaviour means that the tracked
tick may "skip" a tick value in case a previous tick took more than the
expected 50ms.

To compensate for this in important paths, spigot/craftbukkit
implements "wall-time". Instead of incrementing/decrementing ticks on
block entities/entities by one for each call to their tick() method,
they instead increment/decrement important values, like
an ItemEntity's age or pickupDelay, by the difference of
`currentTick - lastTick`, where `lastTick` is the value of
`currentTick` during the last tick() call.

These "fixes" however do not play nicely with minecraft's simulation
distance as entities/block entities implementing the above behaviour
would "catch up" their values when moving from a non-ticking chunk to a
ticking one as their `lastTick` value remains stuck on the last tick in
a ticking chunk and hence lead to a large "catch up" once ticked again.

Paper completely removes the "tick skipping" behaviour (See patch
"Further-improve-server-tick-loop"), making the above precautions
completely unnecessary, which also rids paper of the previous described
incompatibility with non-ticking chunks.
2024-09-19 16:36:07 +02:00

33 Zeilen
1.5 KiB
Diff

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.Boat getStatus()Lnet/minecraft/world/entity/vehicle/Boat$Status;
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftBoat.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftBoat.java
index d161cbf9c83cd78593864850b98f688da2c85aa5..e33b1b6fd50a4eea57500cc00dba20d6edcab75d 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftBoat.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftBoat.java
@@ -88,6 +88,17 @@ public class CraftBoat extends CraftVehicle implements Boat {
@Override
public Status getStatus() {
+ // Paper start - Fix NPE on Boat getStatus
+ final net.minecraft.world.entity.vehicle.Boat 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);
}