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Paper/Spigot-Server-Patches/0430-Fix-items-vanishing-through-end-portal.patch

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From 1a7d91f6e4660e9769d17df8db4da4c6652318e0 Mon Sep 17 00:00:00 2001
From: AJMFactsheets <AJMFactsheets@gmail.com>
Date: Wed, 22 Jan 2020 19:52:28 -0600
Subject: [PATCH] Fix items vanishing through end portal
If the Paper configuration option "keep-spawn-loaded" is set to false,
items entering the overworld from the end will spawn at Y = 0.
This is due to logic in the getHighestBlockYAt method in World.java
only searching the heightmap if the chunk is loaded.
Quickly loading the exact world spawn chunk before searching the
heightmap resolves the issue without having to load all spawn chunks.
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index e10740a65c..c4e85b86d9 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -2600,6 +2600,11 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
if (blockposition == null) { // CraftBukkit
if (dimensionmanager1.getType() == DimensionManager.THE_END && dimensionmanager == DimensionManager.OVERWORLD) { // CraftBukkit
+ // Paper start - Ensure spawn chunk is always loaded before calculating Y coordinate
+ if (!worldserver1.isLoaded(worldserver1.getSpawn())) {
+ worldserver1.getChunkAtWorldCoords(worldserver1.getSpawn());
+ }
+ // Paper end
// CraftBukkit start
EntityPortalEvent event = CraftEventFactory.callEntityPortalEvent(this, worldserver1, worldserver1.getHighestBlockYAt(HeightMap.Type.MOTION_BLOCKING_NO_LEAVES, worldserver1.getSpawn()), 0);
if (event == null) {
--
2.25.1