java.lang.AssertionError
   at org.netbeans.modules.versioning.ui.diff.DiffSidebar.shutdown(DiffSidebar.java:610)
   at org.netbeans.modules.versioning.ui.diff.DiffSidebar.removeNotify(DiffSidebar.java:586)
   at java.awt.Container.removeNotify(Container.java:2804)
   at javax.swing.JComponent.removeNotify(JComponent.java:4767)
   at java.awt.Container.removeNotify(Container.java:2804)
   at javax.swing.JComponent.removeNotify(JComponent.java:4767)
   at java.awt.Container.removeNotify(Container.java:2804)
   at javax.swing.JComponent.removeNotify(JComponent.java:4767)
   at java.awt.Container.removeNotify(Container.java:2804)
   at javax.swing.JComponent.removeNotify(JComponent.java:4767)
   at java.awt.Container.removeNotify(Container.java:2804)
   at javax.swing.JComponent.removeNotify(JComponent.java:4767)
   at java.awt.Container.remove(Container.java:1204)
   at javax.swing.JLayeredPane.remove(JLayeredPane.java:246)
   at java.awt.Container.remove(Container.java:1262)
   at org.netbeans.editor.PopupManager.removeFromRootPane(PopupManager.java:273)
   at org.netbeans.editor.PopupManager.uninstall(PopupManager.java:158)
   at org.netbeans.editor.PopupManager.install(PopupManager.java:187)
   at org.netbeans.editor.ext.ToolTipSupport.ensureVisibility(ToolTipSupport.java:809)
   at org.netbeans.editor.ext.ToolTipSupport.setToolTip(ToolTipSupport.java:375)
   at org.netbeans.editor.ext.ToolTipSupport.setToolTip(ToolTipSupport.java:331)
   at org.netbeans.editor.ext.ToolTipSupport.setToolTip(ToolTipSupport.java:290)
   at org.netbeans.editor.ext.ToolTipSupport.setToolTip(ToolTipSupport.java:280)
   at org.netbeans.editor.ext.ToolTipSupport.setToolTip(ToolTipSupport.java:276)
   at org.netbeans.spi.debugger.ui.ToolTipUI.show(ToolTipUI.java:98)
   at org.netbeans.modules.cnd.debugger.gdb2.GdbDebuggerImpl$ModelChangeListenerTooltipImpl.modelChanged(GdbDebuggerImpl.java:2817)
   at org.netbeans.modules.cnd.debugger.common2.debugger.ModelChangeDelegator.treeNodeChanged(ModelChangeDelegator.java:158)
   at org.netbeans.modules.cnd.debugger.gdb2.GdbDebuggerImpl.updateValue(GdbDebuggerImpl.java:3191)
   at org.netbeans.modules.cnd.debugger.gdb2.GdbDebuggerImpl.updateValue(GdbDebuggerImpl.java:3161)
   at org.netbeans.modules.cnd.debugger.gdb2.GdbDebuggerImpl.access$4900(GdbDebuggerImpl.java:150)
   at org.netbeans.modules.cnd.debugger.gdb2.GdbDebuggerImpl$36.onDone(GdbDebuggerImpl.java:3672)
   at org.netbeans.modules.cnd.debugger.gdb2.mi.MICommandManager.dispatch(MICommandManager.java:194)
   at org.netbeans.modules.cnd.debugger.gdb2.mi.MIProxy.dispatch(MIProxy.java:188)
   at org.netbeans.modules.cnd.debugger.gdb2.Gdb$MyMIProxy.dispatch(Gdb.java:697)
   at org.netbeans.modules.cnd.debugger.gdb2.mi.MIProxy.result(MIProxy.java:193)
   at org.netbeans.modules.cnd.debugger.gdb2.mi.MIProxy.processLine(MIProxy.java:157)
   at org.netbeans.modules.cnd.debugger.gdb2.Tap$4.run(Tap.java:353)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:420)
   at org.netbeans.modules.cnd.debugger.gdb2.Tap.dispatchInterceptedLines(Tap.java:349)
   at org.netbeans.modules.cnd.debugger.gdb2.Tap.putChars(Tap.java:115)
   at org.netbeans.lib.terminalemulator.Term.putChars(Term.java:3376)
   at org.netbeans.lib.terminalemulator.StreamTerm$OutputMonitor$Trampoline.run(StreamTerm.java:204)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:301)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:709)
   at java.awt.EventQueue$3.run(EventQueue.java:703)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)