java.lang.NullPointerException
   at org.netbeans.modules.projectapi.LazyLookupProviders$1Prov$1.<init>(LazyLookupProviders.java:90)
   at org.netbeans.modules.projectapi.LazyLookupProviders$1Prov.createAdditionalLookup(LazyLookupProviders.java:89)
   at org.netbeans.spi.project.support.DelegatingLookupImpl.doDelegate(DelegatingLookupImpl.java:139)
   at org.netbeans.spi.project.support.DelegatingLookupImpl.<init>(DelegatingLookupImpl.java:91)
   at org.netbeans.spi.project.support.LookupProviderSupport.createCompositeLookup(LookupProviderSupport.java:107)
   at org.netbeans.modules.maven.NbMavenProjectImpl.<init>(NbMavenProjectImpl.java:248)
   at org.netbeans.modules.maven.NbMavenProjectFactory.loadProject(NbMavenProjectFactory.java:119)
   at org.netbeans.modules.projectapi.nb.NbProjectManager.createProject(NbProjectManager.java:401)
   at org.netbeans.modules.projectapi.nb.NbProjectManager.access$300(NbProjectManager.java:94)
   at org.netbeans.modules.projectapi.nb.NbProjectManager$2.run(NbProjectManager.java:314)
   at org.netbeans.modules.projectapi.nb.NbProjectManager$2.run(NbProjectManager.java:243)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation.readAccess(DefaultMutexImplementation.java:252)
   at org.openide.util.Mutex.readAccess(Mutex.java:250)
   at org.netbeans.modules.projectapi.nb.NbProjectManager.findProject(NbProjectManager.java:243)
   at org.netbeans.api.project.ProjectManager.findProject(ProjectManager.java:164)
   at org.netbeans.modules.projectapi.SimpleFileOwnerQueryImplementation.getOwner(SimpleFileOwnerQueryImplementation.java:144)
   at org.netbeans.api.project.FileOwnerQuery.getOwner(FileOwnerQuery.java:114)
   at org.netbeans.modules.java.project.ProjectClassPathProvider.findClassPath(ProjectClassPathProvider.java:68)
   at org.netbeans.api.java.classpath.ClassPath.getClassPath(ClassPath.java:663)
   at org.netbeans.modules.parsing.impl.indexing.errors.Utilities.getSourceClassPathFor(Utilities.java:84)
   at org.netbeans.modules.parsing.ui.indexing.errors.ErrorAnnotator$1.run(ErrorAnnotator.java:313)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1425)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:59)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:294)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2038)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1466)
   at org.netbeans.modules.parsing.ui.indexing.errors.ErrorAnnotator.enqueue(ErrorAnnotator.java:255)
   at org.netbeans.modules.parsing.ui.indexing.errors.ErrorAnnotator.isInError(ErrorAnnotator.java:278)
   at org.netbeans.modules.parsing.ui.indexing.errors.ErrorAnnotator.annotateIcon(ErrorAnnotator.java:135)
   at org.netbeans.modules.masterfs.ui.FileBasedFSWithUI$UiDecorator.annotateIcon(FileBasedFSWithUI.java:77)
   at org.openide.loaders.DataFolder$FolderNode.getIcon(DataFolder.java:1234)
   at org.openide.nodes.FilterNode.getIcon(FilterNode.java:564)
   at org.openide.nodes.FilterNode.getIcon(FilterNode.java:564)
   at org.openide.explorer.view.VisualizerNode.getIcon(VisualizerNode.java:559)
   at org.openide.explorer.view.NodeRenderer.configureFrom(NodeRenderer.java:235)
   at org.openide.explorer.view.NodeRenderer.getTreeCellRendererComponent(NodeRenderer.java:161)
   at javax.swing.plaf.basic.BasicTreeUI$NodeDimensionsHandler.getNodeDimensions(BasicTreeUI.java:2807)
   at javax.swing.tree.AbstractLayoutCache.getNodeDimensions(AbstractLayoutCache.java:492)
   at javax.swing.tree.FixedHeightLayoutCache.getBounds(FixedHeightLayoutCache.java:553)
   at javax.swing.tree.FixedHeightLayoutCache.getBounds(FixedHeightLayoutCache.java:199)
   at javax.swing.plaf.basic.BasicTreeUI.getPathBounds(BasicTreeUI.java:529)
   at javax.swing.plaf.basic.BasicTreeUI.getPathBounds(BasicTreeUI.java:522)
   at javax.swing.plaf.basic.BasicTreeUI$Handler.treeNodesChanged(BasicTreeUI.java:3845)
   at javax.swing.tree.DefaultTreeModel.fireTreeNodesChanged(DefaultTreeModel.java:486)
   at javax.swing.tree.DefaultTreeModel.nodesChanged(DefaultTreeModel.java:348)
   at javax.swing.tree.DefaultTreeModel.nodeChanged(DefaultTreeModel.java:279)
   at org.openide.explorer.view.NodeTreeModel$Listener.update(NodeTreeModel.java:286)
   at org.openide.explorer.view.VisualizerNode.run(VisualizerNode.java:461)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation.readAccess(DefaultMutexImplementation.java:236)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation$1R.run(DefaultMutexImplementation.java:1080)
   at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1921)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation.doWrapperAccess(DefaultMutexImplementation.java:1099)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation.readAccess(DefaultMutexImplementation.java:226)
   at org.openide.util.Mutex.readAccess(Mutex.java:260)
   at org.openide.explorer.view.VisualizerNode$QP.processQueue(VisualizerNode.java:686)
   at org.openide.explorer.view.VisualizerNode$QP.access$000(VisualizerNode.java:625)
   at org.openide.explorer.view.VisualizerNode$QP$ProcessQueue.run(VisualizerNode.java:707)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
   at java.awt.EventQueue.access$400(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:697)
   at java.awt.EventQueue$3.run(EventQueue.java:691)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
   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)