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c5a10665b8
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.
28 lines
1.8 KiB
Diff
28 lines
1.8 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: Tue, 15 Mar 2022 01:38:15 -0700
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Subject: [PATCH] Make some itemstacks nonnull
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diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryPlayer.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryPlayer.java
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index 972fe4237461f07f78b60845b2ebfefb06698ded..9d74577af071954e1e37201a96368c1360076209 100644
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--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryPlayer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryPlayer.java
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@@ -155,13 +155,13 @@ public class CraftInventoryPlayer extends CraftInventory implements org.bukkit.i
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case OFF_HAND:
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return this.getItemInOffHand();
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case FEET:
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- return this.getBoots();
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+ return java.util.Objects.requireNonNullElseGet(this.getBoots(), () -> new ItemStack(org.bukkit.Material.AIR)); // Paper - make nonnull
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case LEGS:
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- return this.getLeggings();
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+ return java.util.Objects.requireNonNullElseGet(this.getLeggings(), () -> new ItemStack(org.bukkit.Material.AIR)); // Paper - make nonnull
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case CHEST:
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- return this.getChestplate();
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+ return java.util.Objects.requireNonNullElseGet(this.getChestplate(), () -> new ItemStack(org.bukkit.Material.AIR)); // Paper - make nonnull
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case HEAD:
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- return this.getHelmet();
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+ return java.util.Objects.requireNonNullElseGet(this.getHelmet(), () -> new ItemStack(org.bukkit.Material.AIR)); // Paper - make nonnull
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default:
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throw new IllegalArgumentException("Not implemented. This is a bug");
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}
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