If you run a battle between MyFirstTeam and Walls, you will see this exception in the console:
java.lang.ArrayIndexOutOfBoundsException: 5
at net.sf.robocode.ui.dialog.RobotButton$BattleObserver.onTurnEnded(RobotButton.java:198)
at net.sf.robocode.battle.events.BattleEventDispatcher.onTurnEnded(BattleEventDispatcher.java:128)
at net.sf.robocode.ui.battle.AwtBattleAdaptor.awtOnTurnEnded(AwtBattleAdaptor.java:124)
at net.sf.robocode.ui.battle.AwtBattleAdaptor.access$200(AwtBattleAdaptor.java:31)
at net.sf.robocode.ui.battle.AwtBattleAdaptor$BattleObserver$8.run(AwtBattleAdaptor.java:298)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.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)
It isn't a problem, but it is slightly annoying.
This was on Robocode 1.9.2.6 on Java 8u144 on Windows 10.
Fixed. The index provided was a "contestant index", but should have been a "team index". :-)
It looks fixed on my side as well.