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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Date: Mon, 11 Jan 2021 12:43:51 -0800
Subject: [PATCH] Fix villager boat exploit


diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index ec080eb8e3930b6c5cc08c3061535b379a99a7d1..846132dad557b04a3d52184cfb1c0dd35673f8c6 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -595,6 +595,14 @@ public abstract class PlayerList {
                 PlayerList.LOGGER.debug("Removing player mount");
                 entityplayer.stopRiding();
                 entity.getPassengersAndSelf().forEach((entity1) -> {
+                    // Paper start - Fix villager boat exploit
+                    if (entity1 instanceof net.minecraft.world.entity.npc.AbstractVillager villager) {
+                        final net.minecraft.world.entity.player.Player human = villager.getTradingPlayer();
+                        if (human != null) {
+                            villager.setTradingPlayer(null);
+                        }
+                    }
+                    // Paper end - Fix villager boat exploit
                     entity1.setRemoved(Entity.RemovalReason.UNLOADED_WITH_PLAYER, EntityRemoveEvent.Cause.PLAYER_QUIT); // CraftBukkit - add Bukkit remove cause
                 });
             }