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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.
33 lines
1.5 KiB
Diff
33 lines
1.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: LemonCaramel <admin@caramel.moe>
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Date: Mon, 10 Apr 2023 20:48:26 +0900
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Subject: [PATCH] Fix NPE on Boat getStatus
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Boat status is null until the entity is added to the world and the tick() method is called.
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== AT ==
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public net.minecraft.world.entity.vehicle.Boat getStatus()Lnet/minecraft/world/entity/vehicle/Boat$Status;
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diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftBoat.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftBoat.java
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index d161cbf9c83cd78593864850b98f688da2c85aa5..e33b1b6fd50a4eea57500cc00dba20d6edcab75d 100644
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--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftBoat.java
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+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftBoat.java
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@@ -88,6 +88,17 @@ public class CraftBoat extends CraftVehicle implements Boat {
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@Override
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public Status getStatus() {
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+ // Paper start - Fix NPE on Boat getStatus
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+ final net.minecraft.world.entity.vehicle.Boat handle = this.getHandle();
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+ if (handle.status == null) {
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+ if (handle.valid) {
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+ // Don't actually set the status because it would skew the old status check in the next tick
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+ return CraftBoat.boatStatusFromNms(handle.getStatus());
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+ } else {
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+ return Status.NOT_IN_WORLD;
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+ }
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+ }
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+ // Paper end - Fix NPE on Boat getStatus
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return CraftBoat.boatStatusFromNms(this.getHandle().status);
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}
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