java.lang.NullPointerException
   at org.netbeans.core.output2.ui.AbstractOutputPane.hasSelectionChanged(AbstractOutputPane.java:595)
   at org.netbeans.core.output2.ui.AbstractOutputPane.stateChanged(AbstractOutputPane.java:565)
   at javax.swing.text.DefaultCaret.fireStateChanged(DefaultCaret.java:802)
   at javax.swing.text.DefaultCaret.changeCaretPosition(DefaultCaret.java:1277)
   at javax.swing.text.DefaultCaret.handleSetDot(DefaultCaret.java:1173)
   at javax.swing.text.DefaultCaret.setDot(DefaultCaret.java:1154)
   at javax.swing.text.DefaultCaret.setDot(DefaultCaret.java:1051)
   at org.netbeans.core.output2.ui.AbstractOutputPane.insertUpdate(AbstractOutputPane.java:624)
   at org.netbeans.core.output2.OutputDocument.fireDocumentEvent(OutputDocument.java:523)
   at org.netbeans.core.output2.OutputDocument.stateChanged(OutputDocument.java:501)
   at org.netbeans.core.output2.AbstractLines.run(AbstractLines.java:280)
   at org.openide.util.Mutex.doEvent(Mutex.java:1356)
   at org.openide.util.Mutex.readAccess(Mutex.java:355)
   at org.netbeans.core.output2.AbstractLines.fire(AbstractLines.java:274)
   at org.netbeans.core.output2.AbstractLines.actionPerformed(AbstractLines.java:247)
   at javax.swing.Timer.fireActionPerformed(Timer.java:312)
   at javax.swing.Timer$DoPostEvent.run(Timer.java:244)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:694)
   at java.awt.EventQueue$3.run(EventQueue.java:692)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)