generate:
[eclipse.publish.featuresAndBundles] Generating metadata for ..
[eclipse.publish.featuresAndBundles] java.lang.NullPointerException
[eclipse.publish.featuresAndBundles] at org.eclipse.equinox.internal.p2.metadata.repository.io.MetadataWriter.hasOnlySimpleRequirements(MetadataWriter.java:113)
[eclipse.publish.featuresAndBundles] at org.eclipse.equinox.internal.p2.metadata.repository.io.MetadataWriter.writeInstallableUnit(MetadataWriter.java:58)
[eclipse.publish.featuresAndBundles] at org.eclipse.equinox.internal.p2.metadata.repository.io.MetadataWriter.writeInstallableUnits(MetadataWriter.java:46)
[eclipse.publish.featuresAndBundles] at org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryIO$Writer.write(MetadataRepositoryIO.java:148)
[eclipse.publish.featuresAndBundles] at org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryIO.write(MetadataRepositoryIO.java:93)
[eclipse.publish.featuresAndBundles] at org.eclipse.equinox.internal.p2.metadata.repository.LocalMetadataRepository.save(LocalMetadataRepository.java:306)
[eclipse.publish.featuresAndBundles] at org.eclipse.equinox.internal.p2.metadata.repository.LocalMetadataRepository.addInstallableUnits(LocalMetadataRepository.java:111)
[eclipse.publish.featuresAndBundles] at org.eclipse.equinox.p2.publisher.Publisher.savePublishedIUs(Publisher.java:258)