java.lang.NullPointerException
	at org.netbeans.spi.viewmodel.Models.createCompoundModel(Models.java:215)
	at org.netbeans.modules.debugger.ui.views.ViewModelListener.refreshModel(ViewModelListener.java:225)
	at org.netbeans.modules.debugger.ui.views.ViewModelListener.updateModel(ViewModelListener.java:200)
	at org.netbeans.modules.debugger.ui.views.ViewModelListener.propertyChange(ViewModelListener.java:135)
	at org.netbeans.api.debugger.DebuggerManager.firePropertyChange(DebuggerManager.java:633)
	at org.netbeans.api.debugger.DebuggerManager.setCurrentSession(DebuggerManager.java:429)
	at org.netbeans.api.debugger.DebuggerManager.removeSession(DebuggerManager.java:1370)
	at org.netbeans.api.debugger.DebuggerManager.access$500(DebuggerManager.java:119)
	at org.netbeans.api.debugger.DebuggerManager$SessionListener.propertyChange(DebuggerManager.java:1432)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:333)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:270)
	at org.netbeans.api.debugger.Session.removeEngine(Session.java:359)
	at org.netbeans.api.debugger.DebuggerEngine$Destructor.killEngine(DebuggerEngine.java:199)
	at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.finish(JPDADebuggerImpl.java:1043)
	at org.netbeans.modules.debugger.jpda.actions.KillActionProvider.doAction(KillActionProvider.java:52)
	at org.netbeans.spi.debugger.ActionsProvider$1.run(ActionsProvider.java:83)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:539)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:964)