# Sphinx version: 1.6.5
# Python version: 2.7.14 (CPython)
# Docutils version: 0.14 
# Jinja2 version: 2.10
# Last messages:
#   Using openstackdocstheme Sphinx theme from /home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/openstackdocstheme/theme
#   building [mo]: all of 0 po files
#   building [html]: all source files
#   updating environment:
#   7 added, 0 changed, 0 removed
#   reading sources... [ 14%] index
#   reading sources... [ 28%] liberty
#   no configuration file in: /home/eharney/src/cinder-review5/releasenotes/config.yaml, /home/eharney/src/cinder-review5/reno.yaml
#   [reno] scanning /home/eharney/src/cinder-review5/releasenotes/notes for origin/stable/liberty release notes
#   scanning /home/eharney/src/cinder-review5/releasenotes/notes (branch=origin/stable/liberty earliest_version=None collapse_pre_releases=True)
# Loaded extensions:
#   openstackdocstheme (unknown version) from /home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/openstackdocstheme/__init__.pyc
#   reno.sphinxext (unknown version) from /home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/reno/sphinxext.pyc
#   alabaster (0.7.10) from /home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/alabaster/__init__.pyc
Traceback (most recent call last):
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/sphinx/cmdline.py", line 306, in main
    app.build(opts.force_all, filenames)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/sphinx/application.py", line 333, in build
    self.builder.build_all()
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/sphinx/builders/__init__.py", line 288, in build_all
    self.build(None, summary='all source files', method='all')
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/sphinx/builders/__init__.py", line 344, in build
    updated_docnames = set(self.env.update(self.config, self.srcdir, self.doctreedir))
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/sphinx/environment/__init__.py", line 584, in update
    self._read_serial(docnames, self.app)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/sphinx/environment/__init__.py", line 603, in _read_serial
    self.read_doc(docname, app)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/sphinx/environment/__init__.py", line 726, in read_doc
    pub.publish()
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/core.py", line 217, in publish
    self.settings)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/sphinx/io.py", line 74, in read
    self.parse()
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/readers/__init__.py", line 78, in parse
    self.parser.parse(self.input, document)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/parsers/rst/__init__.py", line 191, in parse
    self.statemachine.run(inputlines, document, inliner=self.inliner)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/parsers/rst/states.py", line 171, in run
    input_source=document['source'])
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/statemachine.py", line 239, in run
    context, state, transitions)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/statemachine.py", line 460, in check_line
    return method(match, context, next_state)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/parsers/rst/states.py", line 2988, in text
    self.section(title.lstrip(), source, style, lineno + 1, messages)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/parsers/rst/states.py", line 327, in section
    self.new_subsection(title, lineno, messages)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/parsers/rst/states.py", line 395, in new_subsection
    node=section_node, match_titles=True)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/parsers/rst/states.py", line 282, in nested_parse
    node=node, match_titles=match_titles)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/parsers/rst/states.py", line 196, in run
    results = StateMachineWS.run(self, input_lines, input_offset)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/statemachine.py", line 239, in run
    context, state, transitions)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/statemachine.py", line 460, in check_line
    return method(match, context, next_state)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/parsers/rst/states.py", line 2326, in explicit_markup
    nodelist, blank_finish = self.explicit_construct(match)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/parsers/rst/states.py", line 2338, in explicit_construct
    return method(self, expmatch)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/parsers/rst/states.py", line 2081, in directive
    directive_class, match, type_name, option_presets)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/docutils/parsers/rst/states.py", line 2130, in run_directive
    result = directive_instance.run()
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/reno/sphinxext.py", line 91, in run
    ldr = loader.Loader(conf)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/reno/loader.py", line 60, in __init__
    self._load_data()
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/reno/loader.py", line 80, in _load_data
    self._scanner_output = self._scanner.get_notes_by_version()
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/reno/scanner.py", line 944, in get_notes_by_version
    current_version = self._get_current_version(branch)
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/reno/scanner.py", line 591, in _get_current_version
    commit = self._repo[self._get_ref(branch)]
  File "/home/eharney/src/cinder-review5/.tox/releasenotes/lib/python2.7/site-packages/reno/scanner.py", line 563, in _get_ref
    raise ValueError('Unknown reference {!r}'.format(name))
ValueError: Unknown reference 'origin/stable/liberty'