java.lang.AssertionError: File: /home/kumasrin/scrhome/JDK/hg-dev9-pack200/jdk9/jdk/src/java.base/share/classes@cdffa1ac:6f7b3b02
Path Type: classpath/execute
Owner: Module - java.base - jdk9
ClassPathProviders: 
  org.netbeans.modules.maven.queries.RepositoryMavenCPProvider@6c1b2ed2
  org.netbeans.modules.java.hints.declarative.ClassPathProviderImpl@658f9b5f
  org.netbeans.modules.java.project.ProjectClassPathProvider@3fa2efe
  org.netbeans.modules.csl.core.ProjectClassPathProvider@61a08c5e
  org.netbeans.modules.java.platform.classpath.PlatformClassPathProvider@54784306
  org.netbeans.modules.java.j2seplatform.libraries.J2SELibraryClassPathProvider@4d347fb5
  org.netbeans.modules.jdk.jtreg.ClassPathProviderImpl@1feb2533
  org.netbeans.modules.java.j2seplatform.queries.DefaultClassPathProvider@7acc98ec
  org.netbeans.modules.java.hints.declarative.test.TestPerformer$TestClassPathProvider@6c3a94c0
Project SourceGroups:
  /home/kumasrin/scrhome/JDK/hg-dev9-pack200/jdk9/jdk/src/java.base/share/classes
Project S
   at org.netbeans.modules.java.api.common.project.BaseActionProvider.getProjectMainClass(BaseActionProvider.java:1170)
   at org.netbeans.modules.java.api.common.project.BaseActionProvider.getTargetNames(BaseActionProvider.java:876)
   at org.netbeans.modules.java.j2seproject.J2SEActionProvider.getTargetNames(J2SEActionProvider.java:241)
   at org.netbeans.modules.java.api.common.project.BaseActionProvider$1Action.doRun(BaseActionProvider.java:481)
   at org.netbeans.modules.java.api.common.project.BaseActionProvider$1Action.run(BaseActionProvider.java:458)
   at org.netbeans.api.java.source.ui.ScanDialog.runWhenScanFinished(ScanDialog.java:153)
   at org.netbeans.modules.java.api.common.project.BaseActionProvider.invokeAction(BaseActionProvider.java:660)
   at org.netbeans.spi.project.support.LookupProviderSupport$MergedActionProvider.invokeAction(LookupProviderSupport.java:287)
   at org.netbeans.modules.project.ui.actions.ProjectAction$2.run(ProjectAction.java:187)
   at org.netbeans.modules.openide.util.NbMutexEventProvider$Event.doEvent(NbMutexEventProvider.java:118)
   at org.netbeans.modules.openide.util.NbMutexEventProvider$Event.writeAccess(NbMutexEventProvider.java:83)
   at org.netbeans.modules.openide.util.LazyMutexImplementation.writeAccess(LazyMutexImplementation.java:79)
   at org.openide.util.Mutex.writeAccess(Mutex.java:310)
   at org.netbeans.modules.project.ui.actions.ProjectAction.runSequentially(ProjectAction.java:184)
   at org.netbeans.modules.project.ui.actions.MainProjectAction$1$1.run(MainProjectAction.java:140)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   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)