java.lang.NullPointerException: Failed to retrieve atom name.
        at sun.awt.X11.XlibWrapper.XGetAtomName(XlibWrapper.java:0)
        at sun.awt.X11.XAtom.getName(XAtom.java:169)
        at sun.awt.X11.XDataTransferer.getTargetNameForAtom(XDataTransferer.java:123)
        at sun.awt.X11.XDataTransferer.getNativeForFormat(XDataTransferer.java:112)
        at sun.awt.datatransfer.DataTransferer.getFlavorsForFormats(DataTransferer.java:769)
        at sun.awt.datatransfer.ClipboardTransferable.<init>(ClipboardTransferable.java:72)
        at sun.awt.X11.XClipboard.getContents(XClipboard.java:84)
        at org.openide.explorer.ExplorerActionsImpl.updatePasteAction(ExplorerActionsImpl.java:328)
        at org.openide.explorer.ExplorerActionsImpl.updateActions(ExplorerActionsImpl.java:273)
        at org.openide.explorer.ExplorerActionsImpl.attach(ExplorerActionsImpl.java:169)
        at org.openide.explorer.ExplorerManager.findExplorerActionsImpl(ExplorerManager.java:825)
        at org.openide.explorer.ExplorerUtils.actionCopy(ExplorerUtils.java:148)
        at org.netbeans.modules.project.ui.ProjectTab.<init>(ProjectTab.java:130)
        at org.netbeans.modules.project.ui.ProjectTab.<init>(ProjectTab.java:119)
        at org.netbeans.modules.project.ui.ProjectTab.getDefault(ProjectTab.java:239)
        at org.netbeans.modules.project.ui.ProjectTab.findDefault(ProjectTab.java:225)
        at org.netbeans.modules.project.ui.ProjectTabAction.actionPerformed(ProjectTabAction.java:76)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
        at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1220)
        at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1261)
        at java.awt.Component.processMouseEvent(Component.java:6094)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
        at java.awt.Component.processEvent(Component.java:5859)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4466)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4296)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4322)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:3986)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:3916)
        at java.awt.Container.dispatchEventImpl(Container.java:2102)
        at java.awt.Window.dispatchEventImpl(Window.java:2443)
        at java.awt.Component.dispatchEvent(Component.java:4296)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:284)
        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)