14:37:45 [SEVERE] Could not pass event AsyncPlayerChatEvent to PwnFilter v3.0.0-rc3
java.util.ConcurrentModificationException
        at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:819)
        at java.util.ArrayList$Itr.next(ArrayList.java:791)
        at com.pwn9.PwnFilter.rules.RuleSet.runFilter(RuleSet.java:173)
        at com.pwn9.PwnFilter.rules.RuleSet.apply(RuleSet.java:68)
        at com.pwn9.PwnFilter.PwnFilter.filterChat(PwnFilter.java:187)
        at com.pwn9.PwnFilter.listener.PwnFilterPlayerListener.onPlayerChat(PwnFilterPlayerListener.java:67)
        at com.pwn9.PwnFilter.listener.PwnFilterPlayerListener$1.execute(PwnFilterPlayerListener.java:27)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
        at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:28)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:479)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:461)
        at net.minecraft.server.v1_5_R3.PlayerConnection.chat(PlayerConnection.java:900)
        at net.minecraft.server.v1_5_R3.PlayerConnection.a(PlayerConnection.java:840)
        at net.minecraft.server.v1_5_R3.Packet3Chat.handle(Packet3Chat.java:44)
        at org.spigotmc.netty.NettyNetworkManager$2.run(NettyNetworkManager.java:116)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:722)