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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.
24 lines
1.3 KiB
Diff
24 lines
1.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Shane Freeder <theboyetronic@gmail.com>
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Date: Tue, 3 Mar 2020 05:26:40 +0000
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Subject: [PATCH] Prevent teleporting dead entities
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index 119b9b2c45e3321b4197f3e6a34037e3fa99622d..c6bcde25b476ef2362f469bd7cba82ce97cb300c 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -1552,6 +1552,13 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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}
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public void internalTeleport(double d0, double d1, double d2, float f, float f1, Set<RelativeMovement> set) { // Paper
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+ // Paper start - Prevent teleporting dead entities
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+ if (player.isRemoved()) {
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+ LOGGER.info("Attempt to teleport removed player {} restricted", player.getScoreboardName());
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+ if (server.isDebugging()) io.papermc.paper.util.TraceUtil.dumpTraceForThread("Attempt to teleport removed player");
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+ return;
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+ }
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+ // Paper end - Prevent teleporting dead entities
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// CraftBukkit start
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if (Float.isNaN(f)) {
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f = 0;
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