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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.
20 lines
1.1 KiB
Diff
20 lines
1.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jake Potrebic <jake.m.potrebic@gmail.com>
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Date: Wed, 6 Jul 2022 14:59:38 -0700
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Subject: [PATCH] Fix Bee flower NPE
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diff --git a/src/main/java/net/minecraft/world/entity/animal/Bee.java b/src/main/java/net/minecraft/world/entity/animal/Bee.java
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index f933654b66f7474dc071da5f10cf1684fdac367a..1b3978f4ea7e8491e0c0cb6de23c141f44fab414 100644
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--- a/src/main/java/net/minecraft/world/entity/animal/Bee.java
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+++ b/src/main/java/net/minecraft/world/entity/animal/Bee.java
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@@ -805,7 +805,7 @@ public class Bee extends Animal implements NeutralMob, FlyingAnimal {
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++this.pollinatingTicks;
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if (this.pollinatingTicks > 600) {
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Bee.this.savedFlowerPos = null;
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- } else {
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+ } else if (Bee.this.savedFlowerPos != null) { // Paper - add null check since API can manipulate this
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Vec3 vec3d = Vec3.atBottomCenterOf(Bee.this.savedFlowerPos).add(0.0D, 0.6000000238418579D, 0.0D);
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if (vec3d.distanceTo(Bee.this.position()) > 1.0D) {
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