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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.
47 Zeilen
3.5 KiB
Diff
47 Zeilen
3.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Toon Schoenmakers <nighteyes1993@gmail.com>
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Date: Fri, 23 Oct 2020 15:01:44 +0200
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Subject: [PATCH] Avoid error bubbling up when item stack is empty in fishing
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loot
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This can realistically only happen if there's custom loot active on fishing
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which can return 0 items. This would disconnect the player who's fishing.
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diff --git a/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java b/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java
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index 0b4c67b9de6893601f032a8fae103e8a98f2c767..5b7734020b496ade3740d92908ad2d399bfd55e6 100644
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--- a/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java
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+++ b/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java
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@@ -506,9 +506,15 @@ public class FishingHook extends Projectile {
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while (iterator.hasNext()) {
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ItemStack itemstack1 = (ItemStack) iterator.next();
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- ItemEntity entityitem = new ItemEntity(this.level(), this.getX(), this.getY(), this.getZ(), itemstack1);
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+ // Paper start - new ItemEntity would throw if for whatever reason (mostly shitty datapacks) the itemstack1 turns out to be empty
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+ // if the item stack is empty we instead just have our entityitem as null
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+ ItemEntity entityitem = null;
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+ if (!itemstack1.isEmpty()) {
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+ entityitem = new ItemEntity(this.level(), this.getX(), this.getY(), this.getZ(), itemstack1);
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+ }
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+ // Paper end
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// CraftBukkit start
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- PlayerFishEvent playerFishEvent = new PlayerFishEvent((Player) entityhuman.getBukkitEntity(), entityitem.getBukkitEntity(), (FishHook) this.getBukkitEntity(), PlayerFishEvent.State.CAUGHT_FISH);
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+ PlayerFishEvent playerFishEvent = new PlayerFishEvent((Player) entityhuman.getBukkitEntity(), entityitem != null ? entityitem.getBukkitEntity() : null, (FishHook) this.getBukkitEntity(), PlayerFishEvent.State.CAUGHT_FISH); // Paper - entityitem may be null
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playerFishEvent.setExpToDrop(this.random.nextInt(6) + 1);
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this.level().getCraftServer().getPluginManager().callEvent(playerFishEvent);
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@@ -521,8 +527,12 @@ public class FishingHook extends Projectile {
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double d2 = entityhuman.getZ() - this.getZ();
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double d3 = 0.1D;
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- entityitem.setDeltaMovement(d0 * 0.1D, d1 * 0.1D + Math.sqrt(Math.sqrt(d0 * d0 + d1 * d1 + d2 * d2)) * 0.08D, d2 * 0.1D);
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- this.level().addFreshEntity(entityitem);
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+ // Paper start - entity item can be null, so we need to check against this
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+ if (entityitem != null) {
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+ entityitem.setDeltaMovement(d0 * 0.1D, d1 * 0.1D + Math.sqrt(Math.sqrt(d0 * d0 + d1 * d1 + d2 * d2)) * 0.08D, d2 * 0.1D);
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+ this.level().addFreshEntity(entityitem);
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+ }
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+ // Paper end
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// CraftBukkit start - this.random.nextInt(6) + 1 -> playerFishEvent.getExpToDrop()
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if (playerFishEvent.getExpToDrop() > 0) {
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entityhuman.level().addFreshEntity(new ExperienceOrb(entityhuman.level(), entityhuman.getX(), entityhuman.getY() + 0.5D, entityhuman.getZ() + 0.5D, playerFishEvent.getExpToDrop(), org.bukkit.entity.ExperienceOrb.SpawnReason.FISHING, this.getPlayerOwner(), this)); // Paper
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