From 6b67defb92e04c855fb01fe6a1bddd7ebe746cd4 Mon Sep 17 00:00:00 2001 From: md_5 Date: Mon, 10 Mar 2014 09:03:28 +1100 Subject: [PATCH] Guard Entity List diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java index e557b4f..091b04d 100644 --- a/src/main/java/net/minecraft/server/World.java +++ b/src/main/java/net/minecraft/server/World.java @@ -31,7 +31,32 @@ import org.bukkit.event.weather.ThunderChangeEvent; public abstract class World implements IBlockAccess { public boolean d; - public List entityList = new ArrayList(); + // Spigot start - guard entity list from removals + public List entityList = new ArrayList() + { + @Override + public Object remove(int index) + { + guard(); + return super.remove( index ); + } + + @Override + public boolean remove(Object o) + { + guard(); + return super.remove( o ); + } + + private void guard() + { + if ( guardEntityList ) + { + throw new java.util.ConcurrentModificationException(); + } + } + }; + // Spigot end protected List f = new ArrayList(); public Set tileEntityList = new HashSet(); // CraftBukkit - ArrayList -> HashSet private List a = new ArrayList(); @@ -81,6 +106,7 @@ public abstract class World implements IBlockAccess { int[] I; // Spigot start + private boolean guardEntityList; protected final gnu.trove.map.hash.TLongShortHashMap chunkTickList; protected float growthOdds = 100; protected float modifiedOdds = 100; @@ -1354,6 +1380,7 @@ public abstract class World implements IBlockAccess { org.spigotmc.ActivationRange.activateEntities(this); // Spigot timings.entityTick.startTiming(); // Spigot + guardEntityList = true; // Spigot // CraftBukkit start - Use field for loop variable for (this.tickPosition = 0; this.tickPosition < this.entityList.size(); ++this.tickPosition) { entity = (Entity) this.entityList.get(this.tickPosition); @@ -1402,12 +1429,15 @@ public abstract class World implements IBlockAccess { this.getChunkAt(j, k).b(entity); } + guardEntityList = false; // Spigot this.entityList.remove(this.tickPosition--); // CraftBukkit - Use field for loop variable + guardEntityList = true; // Spigot this.b(entity); } this.methodProfiler.b(); } + guardEntityList = false; // Spigot timings.entityTick.stopTiming(); // Spigot this.methodProfiler.c("blockEntities"); -- 1.9.1