From 6d504c2d4c4eb5b7340fc9156303b791fee37735 Mon Sep 17 00:00:00 2001
From: md_5 <git@md-5.net>
Date: Wed, 24 Apr 2019 10:10:41 +1000
Subject: [PATCH] SPIGOT-4725: Virtual Merchant GUI crashes server

---
 .../bukkit/craftbukkit/inventory/CraftMerchantCustom.java   | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantCustom.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantCustom.java
index bc9359001f..0c10b001a5 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantCustom.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantCustom.java
@@ -31,6 +31,7 @@ public class CraftMerchantCustom extends CraftMerchant {
         private final IChatBaseComponent title;
         private final MerchantRecipeList trades = new MerchantRecipeList();
         private EntityHuman tradingPlayer;
+        private World tradingWorld;
 
         public MinecraftMerchant(String title) {
             Validate.notNull(title, "Title cannot be null");
@@ -40,6 +41,9 @@ public class CraftMerchantCustom extends CraftMerchant {
         @Override
         public void setTradingPlayer(EntityHuman entityhuman) {
             this.tradingPlayer = entityhuman;
+            if (entityhuman != null) {
+                this.tradingWorld = entityhuman.world;
+            }
         }
 
         @Override
@@ -68,7 +72,7 @@ public class CraftMerchantCustom extends CraftMerchant {
 
         @Override
         public World getWorld() {
-            return null;
+            return this.tradingWorld;
         }
 
         @Override