Comment 1 for bug 685180

cvxopt:

Running Sphinx v1.0.1
loading pickled environment... not yet created
building [latex]: all documents
updating environment: 13 added, 0 changed, 0 removed
reading sources... [ 7%] blas
reading sources... [ 15%] c-api
reading sources... [ 23%] coneprog
reading sources... [ 30%] copyright
reading sources... [ 38%] fftw
reading sources... [ 46%] index
reading sources... [ 53%] intro
reading sources... [ 61%] lapack
reading sources... [ 69%] matrices
reading sources... [ 76%] modeling
reading sources... [ 84%] printing
reading sources... [ 92%] solvers
reading sources... [100%] spsolvers

/build/buildd/cvxopt-1.1.2/doc/source/c-api.rst:: WARNING: using old C markup; please migrate to new-style markup (e.g. c:function instead of cfunction), see http://sphinx.pocoo.org/domains.html
/build/buildd/cvxopt-1.1.2/doc/source/modeling.rst:622: WARNING: duplicate object description of tofile, other instance in /build/buildd/cvxopt-1.1.2/doc/source/matrices.rst, use :noindex: for one of them
/build/buildd/cvxopt-1.1.2/doc/source/modeling.rst:629: WARNING: duplicate object description of fromfile, other instance in /build/buildd/cvxopt-1.1.2/doc/source/matrices.rst, use :noindex: for one of them
looking for now-outdated files... none found
pickling environment... done
checking consistency... done
processing CVXOPT.tex... index copyright intro matrices blas lapack fftw spsolvers coneprog solvers modeling c-api printing
resolving references...

Exception occurred:
  File "/usr/lib/pymodules/python2.6/sphinx/domains/python.py", line 624, in <genexpr>
    ', '.join(match[0] for match in matches)),
TypeError: 'NoneType' object is unsubscriptable
The full traceback has been saved in /tmp/sphinx-err-RfwOip.log, if you want to report the issue to the developers.
Please also report this if it was a user error, so that a better error message can be provided next time.
Either send bugs to the mailing list at <http://groups.google.com/group/sphinx-dev/>,
or report them in the tracker at <http://bitbucket.org/birkenfeld/sphinx/issues/>. Thanks!
make[1]: *** [latex] Error 1
make[1]: Leaving directory `/build/buildd/cvxopt-1.1.2/doc'
make: *** [debian/stamp-docs] Error 2