java.lang.NullPointerException
   at org.netbeans.modules.viewmodel.DelegatingCellEditor.removeCellEditorListener(DelegatingCellEditor.java:203)
   at javax.swing.JTable.removeEditor(JTable.java:5806)
   at org.netbeans.swing.etable.ETable.removeEditor(ETable.java:2096)
   at javax.swing.JTable.editingCanceled(JTable.java:4737)
   at org.netbeans.modules.debugger.ui.models.ColumnModels$WatchesTableCellEditor.focusLost(ColumnModels.java:683)
   at java.awt.AWTEventMulticaster.focusLost(AWTEventMulticaster.java:213)
   at java.awt.AWTEventMulticaster.focusLost(AWTEventMulticaster.java:212)
   at java.awt.Component.processFocusEvent(Component.java:6155)
   at java.awt.Component.processEvent(Component.java:6019)
   at java.awt.Container.processEvent(Container.java:2041)
   at java.awt.Component.dispatchEventImpl(Component.java:4630)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1848)
   at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:889)
   at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:562)
   at java.awt.Component.dispatchEventImpl(Component.java:4502)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:137)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)