PaperMC/CraftBukkit-Patches/0092-Fix-ConcurrentModificationException-while-being-idle.patch

From f900a0cd106478ed5382d3934d9a34ef912669b9 Mon Sep 17 00:00:00 2001
From: Thinkofdeath <thethinkofdeath@gmail.com>
Date: Tue, 14 Jan 2014 20:11:25 +0000
Subject: [PATCH] Fix ConcurrentModificationException while being idle kicked
 in a vehicle


diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 04f5ed1..ac9b669 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -1038,16 +1038,19 @@ public abstract class World implements IBlockAccess {
             this.players.remove(entity);
             this.everyoneSleeping();
         }
+        // Spigot start
+        if (!guardEntityList) { // It will get removed after the tick if we are ticking
+            int i = entity.ai;
+            int j = entity.ak;
 
-        int i = entity.ai;
-        int j = entity.ak;
+            if (entity.ah && this.isChunkLoaded(i, j)) {
+                this.getChunkAt(i, j).b(entity);
+            }
 
-        if (entity.ah && this.isChunkLoaded(i, j)) {
-            this.getChunkAt(i, j).b(entity);
+            this.entityList.remove(entity);
+            this.b(entity);
         }
-
-        this.entityList.remove(entity);
-        this.b(entity);
+        // Spigot end
     }
 
     public void addIWorldAccess(IWorldAccess iworldaccess) {
-- 
1.8.3.2