DrussGT Thread Death

I was fighting DrussGT against Husky and this appeared. Possible things that could cause the error: I killed DrussGT from the console.(I do it every match) The match was 150 rounds.

at java.lang.Thread.stop(Thread.java:850) at net.sf.robocode.host.security.RobotThreadManager.stop(RobotThreadManager.java:190) at net.sf.robocode.host.security.RobotThreadManager.stopSteps(RobotThreadManager.java:172) at net.sf.robocode.host.security.RobotThreadManager.forceStop(RobotThreadManager.java:143) at net.sf.robocode.host.proxies.HostingRobotProxy.forceStopThread(HostingRobotProxy.java:144) at net.sf.robocode.host.proxies.BasicRobotProxy.forceStopThread(BasicRobotProxy.java:44) at net.sf.robocode.battle.peer.RobotPeer.checkSkippedTurn(RobotPeer.java:649) at net.sf.robocode.battle.peer.RobotPeer.executeImpl(RobotPeer.java:492) at net.sf.robocode.host.proxies.BasicRobotProxy.executeImpl(BasicRobotProxy.java:384) at net.sf.robocode.host.proxies.BasicRobotProxy.execute(BasicRobotProxy.java:122) at robocode.AdvancedRobot.execute(AdvancedRobot.java:552) at jk.mega.DrussGT.run(DrussGT.java:73) at net.sf.robocode.host.proxies.HostingRobotProxy.callUserCode(HostingRobotProxy.java:274) at net.sf.robocode.host.proxies.HostingRobotProxy.run(HostingRobotProxy.java:221) at net.sf.robocode.host.proxies.BasicRobotProxy.run(BasicRobotProxy.java:44) at java.lang.Thread.run(Thread.java:745)