Repository sabayonlinux.org hasn't been downloaded yet.
Repository sabayonlinux.org is not available. Cannot validate
RepositoryError()
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 @@ Repositories synchronization ...
  # Sabayon Linux Official Repository
  # Repository URL: http://pkg.sabayon.org[/standard/sabayonlinux.org/database/amd64/5
  # Repository local path: /var/lib/entropy/client/database/amd64/sabayonlinux.org/standard/amd64/5
  # Repository API: 2
Exception in thread Thread-3:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/threading.py", line 530, in __bootstrap_inner
    self.run()
  File "/usr/lib/entropy/libraries/entropy/misc.py", line 353, in run
    self.__rc = self.__function(*self.__args, **self.__kwargs)
  File "/usr/lib/entropy/sulfur/sulfur/__init__.py", line 1594, in run_up
    rc = repoConn.sync()
  File "/usr/lib/entropy/libraries/entropy/client/interfaces/repository.py", line 296, in sync
    rc = self._run_sync()
  File "/usr/lib/entropy/libraries/entropy/client/interfaces/repository.py", line 120, in _run_sync
    repo, self.force, self._gpg_feature)
  File "/usr/lib/entropy/libraries/entropy/client/interfaces/db.py", line 2398, in update
    force, gpg).update()
  File "/usr/lib/entropy/libraries/entropy/client/interfaces/db.py", line 1756, in update
    locked = self.__handle_repository_lock()
  File "/usr/lib/entropy/libraries/entropy/client/interfaces/db.py", line 399, in __handle_repository_lock
    unlocked = self._is_repository_unlocked()
  File "/usr/lib/entropy/libraries/entropy/client/interfaces/db.py", line 882, in _is_repository_unlocked
    rc = self._download_item("lock", disallow_redirect = True)
  File "/usr/lib/entropy/libraries/entropy/client/interfaces/db.py", line 868, in _download_item
    rc = fetcher.download()
  File "/usr/lib/entropy/libraries/entropy/fetchers.py", line 317, in download
    status = downloader()
  File "/usr/lib/entropy/libraries/entropy/fetchers.py", line 517, in _urllib_download
    req = urlmod.Request(url, headers = headers)
  File "/usr/lib64/python2.7/urllib2.py", line 205, in __init__
    origin_req_host = request_host(self)
  File "/usr/lib64/python2.7/urllib2.py", line 179, in request_host
    host = urlparse.urlparse(url)[1]
  File "/usr/lib64/python2.7/urlparse.py", line 134, in urlparse
    tuple = urlsplit(url, scheme, allow_fragments)
  File "/usr/lib64/python2.7/urlparse.py", line 182, in urlsplit
    raise ValueError("Invalid IPv6 URL")
ValueError: Invalid IPv6 URL