spacewalk-clone-by-date loops into infinite loop when cloning channels

Issue

• spacewalk-clone-by-date loops into infinite loop

spacewalk-clone-by-date -l rhel-s390x-server-6  RHEL6-S390-2015-04-28 -l rhel-s390x-server-optional-6 RHEL6-OPTIONAL-S390-2015-04-28 -d 2015-04-28 -y -u xchannel -p xxx
Reading repository information.
Using issue_date.

By continuing the following channels will be created: 
RHEL6-OPTIONAL-S390-2015-04-28, RHEL6-S390-2015-04-28
Cloning rhel-s390x-server-6 to RHEL6-S390-2015-04-28 with original package set.
Cloning rhel-s390x-server-optional-6 to RHEL6-OPTIONAL-S390-2015-04-28 with original package set.
Copying repodata, please wait.
Solving Dependencies (5233): 
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Processing Dependencies:
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Dependencies added, looking for new dependencies
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Dependencies added, looking for new dependencies
Solving Dependencies (15): 
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Dependencies added, looking for new dependencies
Solving Dependencies (13): 
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Dependencies added, looking for new dependencies
Solving Dependencies (12): 
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Dependencies added, looking for new dependencies
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Dependencies added, looking for new dependencies
Solving Dependencies (11):
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Processing Dependencies:
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########################################Traceback (most recent call last):
  File "/usr/bin/spacewalk-clone-by-date", line 412, in <module>
    sys.exit(abs(main() or 0))
  File "/usr/bin/spacewalk-clone-by-date", line 402, in main
    return cloneByDate.main(args)
  File "/usr/share/rhn/utils/cloneByDate.py", line 245, in main
    cloner.create_channels(options.skip_depsolve)
  File "/usr/share/rhn/utils/cloneByDate.py", line 391, in create_channels
    + [self.src_parent]))
  File "/usr/share/rhn/utils/cloneByDate.py", line 494, in dep_solve
    self.__dep_solve(nvrea_list)
  File "/usr/share/rhn/utils/cloneByDate.py", line 506, in __dep_solve
    self.process_deps(dep_results)
  File "/usr/share/rhn/utils/cloneByDate.py", line 547, in process_deps
    self.__dep_solve(added_nevras)
  File "/usr/share/rhn/utils/cloneByDate.py", line 506, in __dep_solve
    self.process_deps(dep_results)
  File "/usr/share/rhn/utils/cloneByDate.py", line 547, in process_deps
    self.__dep_solve(added_nevras)
  File "/usr/share/rhn/utils/cloneByDate.py", line 506, in __dep_solve
    self.process_deps(dep_results)
...
  File "/usr/share/rhn/utils/cloneByDate.py", line 547, in process_deps
    self.__dep_solve(added_nevras)
  File "/usr/share/rhn/utils/cloneByDate.py", line 506, in __dep_solve
    self.process_deps(dep_results)
  File "/usr/share/rhn/utils/cloneByDate.py", line 547, in process_deps
    self.__dep_solve(added_nevras)
  File "/usr/share/rhn/utils/cloneByDate.py", line 506, in __dep_solve
    self.process_deps(dep_results)
  File "/usr/share/rhn/utils/cloneByDate.py", line 547, in process_deps
    self.__dep_solve(added_nevras)
  File "/usr/share/rhn/utils/cloneByDate.py", line 506, in __dep_solve
    self.process_deps(dep_results)
  File "/usr/share/rhn/utils/cloneByDate.py", line 540, in process_deps
    added_nevras = added_nevras + cloner.process_deps(needed)
  File "/usr/share/rhn/utils/cloneByDate.py", line 675, in process_deps
    self.reset_new_pkgs()
  File "/usr/share/rhn/utils/cloneByDate.py", line 598, in reset_new_pkgs
    for pkg in self.remote_api.list_packages(self.to_label))
  File "/usr/share/rhn/utils/cloneByDate.py", line 853, in list_packages
    self.auth_token, label)
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1199, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1489, in __request
    verbose=self.__verbose
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1228, in request
    h = self.make_connection(host)
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1414, in make_connection
    return HTTPS(host, None, **(x509 or {}))
  File "/usr/lib64/python2.6/httplib.py", line 1138, in __init__
    cert_file, strict))
  File "/usr/lib64/python2.6/httplib.py", line 1105, in __init__
    HTTPConnection.__init__(self, host, port, strict, timeout)
  File "/usr/lib64/python2.6/httplib.py", line 661, in __init__
    self._set_hostport(host, port)
  File "/usr/lib64/python2.6/httplib.py", line 690, in _set_hostport
    if host and host[0] == '[' and host[-1] == ']':
RuntimeError: maximum recursion depth exceeded in cmp