It happened that assign_uid_to_installed_package() did not explicitly
invalidate the Portage vdb cache and, while this is used inside
add_installed_package(), which did invalidate the vdb cache on its own
already, it is also called directly by entropy.client.interfaces.package
code.
Moreover, root= value wasn't properly handled throughout the execution
of add_installed_package(), which may have caused cache invalidation
issues described above.
e17de72db8