papermc/CraftBukkit-Patches/0003-Prevent-null-hopper-owners-crashing-the-server.patch

From d3ac50de254102713cf758ecb7f0db8ae3d1f7cf Mon Sep 17 00:00:00 2001
From: Suddenly <suddenly@suddenly.coffee>
Date: Tue, 27 May 2014 14:00:41 +0100
Subject: [PATCH] Prevent null hopper owners crashing the server


diff --git a/src/main/java/net/minecraft/server/TileEntityHopper.java b/src/main/java/net/minecraft/server/TileEntityHopper.java
index c7b3495..f7a6140 100644
--- a/src/main/java/net/minecraft/server/TileEntityHopper.java
+++ b/src/main/java/net/minecraft/server/TileEntityHopper.java
@@ -243,13 +243,23 @@ public class TileEntityHopper extends TileEntity implements IHopper {
             if (!this.j() && BlockHopper.c(this.p())) {
                 boolean flag = false;
 
-                if (!this.k()) {
-                    flag = this.x();
+                try { // PaperSpigot Start (Try/catch to prevent null owner crash)
+                    if (!this.k()) {
+                        flag = this.x();
+                    }
+                } catch (NullPointerException e) {
+                    this.getWorld().setAir(this.x, this.y, this.z);
+                    org.bukkit.Bukkit.getLogger().log(java.util.logging.Level.WARNING, "Null owner found for hopper, removing hopper at {0} {1}, {2}, {3}", new Object[]{this.getWorld().getWorld().getName(), this.x, this.y, this.z});
                 }
 
-                if (!this.l()) {
-                    flag = suckInItems(this) || flag;
-                }
+                try {
+                    if (!this.l()) {
+                        flag = suckInItems(this) || flag;
+                    }
+                } catch (NullPointerException e) {
+                    this.getWorld().setAir(this.x, this.y, this.z);
+                    org.bukkit.Bukkit.getLogger().log(java.util.logging.Level.WARNING, "Null owner found for hopper, removing hopper at {0} {1}, {2}, {3}", new Object[]{this.getWorld().getWorld().getName(), this.x, this.y, this.z});
+                } // PaperSpigot End
 
                 if (flag) {
                     this.c(world.spigotConfig.hopperTransfer); // Spigot
-- 
1.9.1