java.lang.AssertionError at org.netbeans.modules.apisupport.project.ui.LibrariesSourceGroup.(LibrariesSourceGroup.java:79) at org.netbeans.modules.apisupport.project.ui.UnitTestLibrariesNode$LibrariesChildren.createNodes(UnitTestLibrariesNode.java:275) at org.netbeans.modules.apisupport.project.ui.UnitTestLibrariesNode$LibrariesChildren.createNodes(UnitTestLibrariesNode.java:206) at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1648) at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:149) at org.openide.nodes.EntrySupport$Default$Info.nodes(EntrySupport.java:943) at org.openide.nodes.EntrySupport$Default.updateAdd(EntrySupport.java:530) at org.openide.nodes.EntrySupport$Default.setEntries(EntrySupport.java:367) at org.openide.nodes.EntrySupport.setEntries(EntrySupport.java:102) at org.openide.nodes.Children$Keys$2.run(Children.java:1542) at org.openide.util.Mutex$1Exec.run(Mutex.java:1244) at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1907) at org.openide.util.Mutex.postRequest(Mutex.java:1250) at org.openide.util.Mutex.postRequest(Mutex.java:1213) at org.openide.util.Mutex.postWriteRequest(Mutex.java:585) at org.openide.nodes.Children$Keys.applyKeys(Children.java:1551) at org.openide.nodes.Children$Keys.setKeys(Children.java:1495) at org.netbeans.modules.apisupport.project.ui.UnitTestLibrariesNode$LibrariesChildren.access$400(UnitTestLibrariesNode.java:206) at org.netbeans.modules.apisupport.project.ui.UnitTestLibrariesNode$LibrariesChildren$1$1.run(UnitTestLibrariesNode.java:253) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968) Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError at org.openide.util.RequestProcessor.post(RequestProcessor.java:425) at org.netbeans.modules.apisupport.project.ui.UnitTestLibrariesNode$LibrariesChildren$1.run(UnitTestLibrariesNode.java:250) at org.openide.util.Mutex.readAccess(Mutex.java:330) at org.netbeans.modules.apisupport.project.ui.UnitTestLibrariesNode$LibrariesChildren.refreshKeys(UnitTestLibrariesNode.java:237) at org.netbeans.modules.apisupport.project.ui.UnitTestLibrariesNode$LibrariesChildren.addNotify(UnitTestLibrariesNode.java:226) at org.openide.nodes.Children.callAddNotify(Children.java:568) at org.openide.nodes.EntrySupport$Default.getArray(EntrySupport.java:770) at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:172) at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:228) at org.openide.nodes.Children.getNodes(Children.java:462) at org.openide.nodes.FilterNode$Children$DefaultSupport.updateKeys(FilterNode.java:1699) at org.openide.nodes.FilterNode$Children$DefaultSupport.update(FilterNode.java:1686) at org.openide.nodes.FilterNode$Children.addNotifyImpl(FilterNode.java:1477) at org.openide.nodes.FilterNode$Children.addNotify(FilterNode.java:1470) at org.openide.nodes.Children.callAddNotify(Children.java:568) at org.openide.nodes.EntrySupport$Default.getArray(EntrySupport.java:770) at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:172) at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:228) at org.openide.nodes.EntrySupport$Default.getNodesCount(EntrySupport.java:232) at org.openide.nodes.Children.getNodesCount(Children.java:502) at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:258) at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:248) at org.openide.explorer.view.VisualizerNode.getChildCount(VisualizerNode.java:325) at javax.swing.tree.DefaultTreeModel.getChildCount(DefaultTreeModel.java:168) at javax.swing.tree.FixedHeightLayoutCache$FHTreeStateNode.expand(FixedHeightLayoutCache.java:1135) at javax.swing.tree.FixedHeightLayoutCache.ensurePathIsExpanded(FixedHeightLayoutCache.java:645) at javax.swing.tree.FixedHeightLayoutCache.setExpandedState(FixedHeightLayoutCache.java:282) at javax.swing.plaf.basic.BasicTreeUI.updateExpandedDescendants(BasicTreeUI.java:1643) at javax.swing.plaf.basic.BasicTreeUI$Handler.treeExpanded(BasicTreeUI.java:3716) at javax.swing.JTree.fireTreeExpanded(JTree.java:2656) at javax.swing.JTree.setExpandedState(JTree.java:3427) at javax.swing.JTree.expandPath(JTree.java:2163) at javax.swing.plaf.basic.BasicTreeUI.toggleExpandState(BasicTreeUI.java:2204) at javax.swing.plaf.basic.BasicTreeUI.handleExpandControlClick(BasicTreeUI.java:2191) at javax.swing.plaf.basic.BasicTreeUI.checkForClickInExpandControl(BasicTreeUI.java:2149) at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:3511) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressedDND(BasicTreeUI.java:3497) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:3456) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.Component.processMouseEvent(Component.java:6264) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6032) 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.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4577) at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4235) at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2478) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:148) 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)