java.lang.IllegalArgumentException: An explored context (/space/src/nb_all/openide/test/regr/src) must be within the root context (Filesystems).
	at org.openide.explorer.ExplorerManager.setExploredContextAndSelection(ExplorerManager.java:277)
	at org.openide.explorer.view.BeanTreeView.selectionChanged(BeanTreeView.java:89)
	at org.openide.explorer.view.TreeView.callSelectionChanged(TreeView.java:579)
	at org.openide.explorer.view.TreeView$TreePropertyListener.run(TreeView.java:776)
	at org.openide.util.Mutex.postRequest(Mutex.java:865)
	at org.openide.util.Mutex.postReadRequest(Mutex.java:351)
	at org.openide.explorer.view.TreeView$TreePropertyListener.valueChanged(TreeView.java:746)
	at javax.swing.tree.DefaultTreeSelectionModel.fireValueChanged(DefaultTreeSelectionModel.java:612)
	at javax.swing.tree.DefaultTreeSelectionModel.notifyPathChange(DefaultTreeSelectionModel.java:1006)
	at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPaths(DefaultTreeSelectionModel.java:288)
	at javax.swing.JTree.setSelectionInterval(JTree.java:1952)
	at javax.swing.plaf.basic.BasicTreeUI$TreeIncrementAction.actionPerformed(BasicTreeUI.java:3053)
	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1384)
	at javax.swing.JComponent.processKeyBinding(JComponent.java:2078)
	at javax.swing.JComponent.processKeyBindings(JComponent.java:2104)
	at javax.swing.JComponent.processKeyEvent(JComponent.java:2041)
	at java.awt.Component.processEvent(Component.java:3553)
	at java.awt.Container.processEvent(Container.java:1164)
	at java.awt.Component.dispatchEventImpl(Component.java:2593)
	at java.awt.Container.dispatchEventImpl(Container.java:1213)
	at java.awt.Component.dispatchEvent(Component.java:2497)
	at java.awt.LightweightDispatcher.processKeyEvent(Container.java:2155)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2135)
	at java.awt.Container.dispatchEventImpl(Container.java:1200)
	at java.awt.Window.dispatchEventImpl(Window.java:926)
	at java.awt.Component.dispatchEvent(Component.java:2497)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:339)
[catch] at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:131)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:98)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:85)