anolis error "argument to reversed() must be a sequence"

gistfile1.txt

anolis --dump-xrefs=data/xrefs/dom/url.json Overview.src.html /tmp/spec
Traceback (most recent call last):
  File "/usr/local/bin/anolis", line 279, in <module>
    main()
  File "/usr/local/bin/anolis", line 62, in main
    tree = generator.fromFile(input, **kwargs)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/anolis-1.1dev-py2.6.egg/anolislib/generator.py", line 87, in fromFile
    process(tree, processes, **kwargs)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/anolis-1.1dev-py2.6.egg/anolislib/generator.py", line 43, in process
    getattr(process_module, process)(tree, **kwargs)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/anolis-1.1dev-py2.6.egg/anolislib/processes/toc.py", line 41, in __init__
    self.buildToc(ElementTree, **kwargs)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/anolis-1.1dev-py2.6.egg/anolislib/processes/toc.py", line 51, in buildToc
    sections = [(section, 0) for section in reversed(outline)]
TypeError: argument to reversed() must be a sequence
make: *** [data/xrefs/dom/url.json] Error 1