java.lang.StringIndexOutOfBoundsException: String index out of range: -1
   at java.lang.String.charAt(String.java:658)
   at org.netbeans.modules.parsing.impl.indexing.TimeStamps.getEnclosedFiles(TimeStamps.java:115)
   at org.netbeans.modules.parsing.impl.indexing.VisibilitySupport$SlidingTask.run(VisibilitySupport.java:252)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1495)
   at org.netbeans.modules.parsing.impl.indexing.VisibilitySupport.stateChanged(VisibilitySupport.java:163)
   at org.netbeans.api.queries.VisibilityQuery.fireChange(VisibilityQuery.java:167)
   at org.netbeans.api.queries.VisibilityQuery.access$500(VisibilityQuery.java:73)
   at org.netbeans.api.queries.VisibilityQuery$VqiChangedListener.stateChanged(VisibilityQuery.java:214)
   at org.netbeans.modules.versioning.core.VcsVisibilityQueryImplementation.fireVisibilityChanged(VcsVisibilityQueryImplementation.java:205)
   at org.netbeans.modules.versioning.core.VcsVisibilityQueryImplementation.fireVisibilityChanged(VcsVisibilityQueryImplementation.java:195)
   at org.netbeans.modules.versioning.core.VcsVisibilityQueryImplementation.access$100(VcsVisibilityQueryImplementation.java:75)
   at org.netbeans.modules.versioning.core.VcsVisibilityQueryImplementation$VisibilityChangedTask.run(VcsVisibilityQueryImplementation.java:243)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2043)