java.lang.NullPointerException
        at org.netbeans.api.java.source.SourceUtils.getDependentRootsImpl(SourceUtils.java:728)
        at org.netbeans.api.java.source.SourceUtils.getDependentRoots(SourceUtils.java:717)
        at org.netbeans.modules.debugger.jpda.projects.MainProjectManager.isDependent(MainProjectManager.java:163)
        at org.netbeans.modules.debugger.jpda.projects.MainProjectManager.getMainProject(MainProjectManager.java:112)
        at org.netbeans.modules.debugger.jpda.projects.RunToCursorActionProvider.shouldBeEnabled(RunToCursorActionProvider.java:192)
        at org.netbeans.modules.debugger.jpda.projects.RunToCursorActionProvider.access$100(RunToCursorActionProvider.java:77)
        at org.netbeans.modules.debugger.jpda.projects.RunToCursorActionProvider$Listener.propertyChange(RunToCursorActionProvider.java:233)
        at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:188)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
        at org.netbeans.spi.debugger.ui.EditorContextDispatcher.firePropertyChange(EditorContextDispatcher.java:487)
        at org.netbeans.spi.debugger.ui.EditorContextDispatcher.access$2100(EditorContextDispatcher.java:104)
        at org.netbeans.spi.debugger.ui.EditorContextDispatcher$EventFirer.run(EditorContextDispatcher.java:725)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:640)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1122)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
        at org.openide.util.RequestProcessor.post(RequestProcessor.java:330)
        at org.netbeans.spi.debugger.ui.EditorContextDispatcher$EditorLookupListener.updateCurrentOpenedPane(EditorContextDispatcher.java:649)
        at org.netbeans.spi.debugger.ui.EditorContextDispatcher$EditorLookupListener.propertyChange(EditorContextDispatcher.java:586)
        at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:188)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
        at org.netbeans.core.windows.RegistryImpl.doFirePropertyChange(RegistryImpl.java:318)
        at org.netbeans.core.windows.RegistryImpl.access$100(RegistryImpl.java:66)
        at org.netbeans.core.windows.RegistryImpl$1.run(RegistryImpl.java:170)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:125)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)