SEVERE: Exception handled at ThrowableHandlers
java.util.ConcurrentModificationException
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909)
	at java.util.ArrayList$Itr.next(ArrayList.java:859)
	at jetbrains.jetpad.base.SimpleAsync.failure(SimpleAsync.java:121)
	at jetbrains.jetpad.base.Asyncs$9.accept(Asyncs.java:184)
	at jetbrains.jetpad.base.Asyncs$9.accept(Asyncs.java:181)
	at jetbrains.jetpad.base.SimpleAsync.failure(SimpleAsync.java:123)
	at jetbrains.jetpad.base.Asyncs$7.accept(Asyncs.java:156)
	at jetbrains.jetpad.base.Asyncs$7.accept(Asyncs.java:153)
	at jetbrains.jetpad.base.SimpleAsync.failure(SimpleAsync.java:123)
	at jetbrains.jetpad.base.Asyncs$7.accept(Asyncs.java:156)
	at jetbrains.jetpad.base.Asyncs$7.accept(Asyncs.java:153)
	at jetbrains.jetpad.base.SimpleAsync.failure(SimpleAsync.java:123)
	at jetbrains.jetpad.otmodel.protocol.AsyncsListHandler$2.call(AsyncsListHandler.java:54)
	at jetbrains.jetpad.otmodel.protocol.AsyncsListHandler.call(AsyncsListHandler.java:73)
	at jetbrains.jetpad.otmodel.protocol.AsyncsListHandler.fail(AsyncsListHandler.java:51)
	at jetbrains.jetpad.otmodel.protocol.client.ClientRootImpl.failLoadAsyncs(ClientRootImpl.java:181)
	at jetbrains.jetpad.otmodel.protocol.client.ClientRootImpl.onLoadRejected(ClientRootImpl.java:294)
	at jetbrains.jetpad.otmodel.protocol.client.ClientRootImpl.access$400(ClientRootImpl.java:31)
	at jetbrains.jetpad.otmodel.protocol.client.ClientRootImpl$LoadHandler.onIncomingRejection(ClientRootImpl.java:636)
	at jetbrains.jetpad.otmodel.protocol.client.root.IncomingRejection.processWith(IncomingRejection.java:24)
	at jetbrains.jetpad.otmodel.protocol.client.Client$MyPort$1.loadRejected(Client.java:1033)
	at jetbrains.jetpad.otmodel.protocol.json.Ot2JsonChannelAdapter.messageReceived(Ot2JsonChannelAdapter.java:112)
	at jetbrains.jetpad.otmodel.protocol.service.OtServiceEndpoint$CommonJsonPort.processMessage(OtServiceEndpoint.java:230)
	at jetbrains.jetpad.otmodel.protocol.service.OtServiceEndpoint$CommonJsonPort$1.messageReceived(OtServiceEndpoint.java:218)
	at jetbrains.jetpad.otmodel.protocol.service.OtServiceEndpoint$CommonJsonPort$1.messageReceived(OtServiceEndpoint.java:215)
	at jetbrains.jetpad.otmodel.protocol.JsonPortExecutingDelegate$JsonChannelExecutingDelegate$1.run(JsonPortExecutingDelegate.java:58)
	at delightex.concurrent.EventQueue.executeAll(EventQueue.java:19)
	at delightex.cospaces.CoSpacesDev.gameStep(CoSpacesDev.java:137)
	at delightex.cospaces.CoSpacesDev.start(CoSpacesDev.java:118)
	at delightex.cospaces.CoSpacesDev.main(CoSpacesDev.java:43)