java.lang.StringIndexOutOfBoundsException: String index out of range: 0
   at java.lang.String.charAt(String.java:646)
   at org.netbeans.modules.maven.indexer.ClassDependencyIndexCreator.dependencies(ClassDependencyIndexCreator.java:348)
   at org.netbeans.modules.maven.indexer.ClassDependencyIndexCreator.addDependenciesToMap(ClassDependencyIndexCreator.java:244)
   at org.netbeans.modules.maven.indexer.ClassDependencyIndexCreator.populateArtifactInfo(ClassDependencyIndexCreator.java:130)
   at org.apache.maven.index.ArtifactContext.createDocument(ArtifactContext.java:184)
   at org.apache.maven.index.DefaultIndexerEngine.update(DefaultIndexerEngine.java:73)
   at org.apache.maven.index.DefaultIndexer.addArtifactsToIndex(DefaultIndexer.java:110)
   at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$4.run(NexusRepositoryIndexerImpl.java:745)
   at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$4.run(NexusRepositoryIndexerImpl.java:685)
   at org.openide.util.Mutex.writeAccess(Mutex.java:443)
   at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.updateIndexWithArtifacts(NexusRepositoryIndexerImpl.java:685)
   at org.netbeans.modules.maven.indexer.api.RepositoryIndexer.updateIndexWithArtifacts(RepositoryIndexer.java:66)
   at org.netbeans.modules.maven.api.execute.RunUtils$3$1.run(RunUtils.java:156)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)