java.lang.AssertionError: memory://fs3//
   at org.openide.filesystems.FileObject.toURI(FileObject.java:1165)
   at org.netbeans.modules.projectapi.SimpleFileOwnerQueryImplementation.getOwner(SimpleFileOwnerQueryImplementation.java:145)
   at org.netbeans.api.project.FileOwnerQuery.getOwner(FileOwnerQuery.java:104)
   at org.netbeans.modules.projectapi.ProjectFileEncodingQueryImplementation.getEncoding(ProjectFileEncodingQueryImplementation.java:66)
   at org.netbeans.api.queries.FileEncodingQuery.getEncoding(FileEncodingQuery.java:94)
   at org.netbeans.modules.parsing.api.Source.createSnapshot(Source.java:316)
   at org.netbeans.modules.parsing.impl.SourceCache.createSnapshot(SourceCache.java:156)
   at org.netbeans.modules.parsing.impl.SourceCache.getSnapshot(SourceCache.java:131)
   at org.netbeans.modules.parsing.impl.SourceCache.getParser(SourceCache.java:176)
   at org.netbeans.modules.parsing.impl.event.EventSupport.init(EventSupport.java:133)
   at org.netbeans.modules.parsing.api.Source.assignListeners(Source.java:498)
   at org.netbeans.modules.parsing.api.Source.access$500(Source.java:111)
   at org.netbeans.modules.parsing.api.Source$MySourceAccessor.assignListeners(Source.java:601)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:181)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:432)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:403)
   at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:676)
   at org.netbeans.modules.java.classfile.CodeGenerator.generateCode(CodeGenerator.java:150)
   at org.netbeans.modules.java.classfile.BinaryElementOpenImpl.open(BinaryElementOpenImpl.java:55)
   at org.netbeans.api.java.source.ui.ElementOpen.open(ElementOpen.java:95)
   at org.netbeans.modules.editor.java.GoToSupport$4.open(GoToSupport.java:942)
   at org.netbeans.modules.editor.java.GoToSupport.performGoToImpl(GoToSupport.java:255)
   at org.netbeans.modules.editor.java.GoToSupport.access$100(GoToSupport.java:123)
   at org.netbeans.modules.editor.java.GoToSupport$2.run(GoToSupport.java:174)
   at org.netbeans.modules.progress.ui.RunOffEDTImpl$1.run(RunOffEDTImpl.java:151)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1404)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1984)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError: memory://fs3//
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:421)
   at org.netbeans.modules.progress.ui.RunOffEDTImpl.runOffEventDispatchThreadImpl(RunOffEDTImpl.java:144)
   at org.netbeans.modules.progress.ui.RunOffEDTImpl.runOffEventDispatchThread(RunOffEDTImpl.java:106)
   at org.netbeans.api.progress.ProgressUtils.runOffEventDispatchThread(ProgressUtils.java:89)
   at org.netbeans.modules.editor.java.GoToSupport.performGoTo(GoToSupport.java:172)
   at org.netbeans.modules.editor.java.GoToSupport.goTo(GoToSupport.java:268)
   at org.netbeans.modules.editor.java.JavaKit$JavaGoToDeclarationAction.gotoDeclaration(JavaKit.java:877)
   at org.netbeans.editor.ext.ExtKit$GotoDeclarationAction.actionPerformed(ExtKit.java:607)
   at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:339)
   at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1661)
   at javax.swing.JComponent.processKeyBinding(JComponent.java:2879)
   at javax.swing.JComponent.processKeyBindings(JComponent.java:2926)
   at javax.swing.JComponent.processKeyEvent(JComponent.java:2842)
   at java.awt.Component.processEvent(Component.java:6282)
   at java.awt.Container.processEvent(Container.java:2229)
   at java.awt.Component.dispatchEventImpl(Component.java:4861)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1908)
   at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:752)
   at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1017)
   at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:889)
   at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:717)
   at java.awt.Component.dispatchEventImpl(Component.java:4731)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Window.dispatchEventImpl(Window.java:2713)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
   at java.awt.EventQueue.access$000(EventQueue.java:101)
   at java.awt.EventQueue$3.run(EventQueue.java:666)
   at java.awt.EventQueue$3.run(EventQueue.java:664)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
   at java.awt.EventQueue$4.run(EventQueue.java:680)
   at java.awt.EventQueue$4.run(EventQueue.java:678)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:162)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)