Collectible Card Game Headquarters

Here's what Forge looked like when the error occurred. (As I'm a spammy new user the image url has been maimed.)

i (dot) imgur (dot) com/ESU46Mb.png

ConcurrentModificationException | Open

Code: Select all

Forge Version:    1.5.21-r26540
Operating System: Windows 8 6.2 amd64
Java Version:     1.7.0_51 Oracle Corporation

java.util.ConcurrentModificationException
   at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
   at java.util.ArrayList$Itr.next(Unknown Source)
   at forge.game.card.Card.getHiddenExtrinsicKeyword(Card.java:4665)
   at forge.game.card.Card.getKeyword(Card.java:4372)
   at forge.game.card.Card.getAmountOfKeyword(Card.java:5235)
   at forge.game.card.Card.getNetAttack(Card.java:4068)
   at forge.view.arcane.PlayArea.collectAllTokens(PlayArea.java:160)
   at forge.view.arcane.PlayArea.doLayout(PlayArea.java:256)
   at forge.view.arcane.PlayArea.recalculateCardPanels(PlayArea.java:620)
   at forge.view.arcane.PlayArea.setupPlayZone(PlayArea.java:578)
   at forge.screens.match.CMatchUI.updateZones(CMatchUI.java:348)
   at forge.GuiDesktop.updateZones(GuiDesktop.java:379)
   at forge.control.FControlGameEventHandler$8.run(FControlGameEventHandler.java:173)
   at java.awt.event.InvocationEvent.dispatch(Unknown Source)
   at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
   at java.awt.EventQueue.access$200(Unknown Source)
   at java.awt.EventQueue$3.run(Unknown Source)
   at java.awt.EventQueue$3.run(Unknown Source)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
   at java.awt.EventQueue.dispatchEvent(Unknown Source)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.run(Unknown Source)