# Sphinx version: 1.3.4
# Python version: 2.7.11 (CPython)
# Docutils version: 0.12 release
# Jinja2 version: 2.8
# Last messages:
#   reading sources... [  4%] api/index
#   reading sources... [  4%] api/index_backend_api
#   reading sources... [  4%] api/legend_api
#   reading sources... [  4%] api/lines_api
#   reading sources... [  4%] api/markers_api
#   reading sources... [  4%] api/mathtext_api
#   reading sources... [  4%] api/matplotlib_configuration_api
#   reading sources... [  5%] api/mlab_api
#   reading sources... [  5%] api/offsetbox_api
#   reading sources... [  5%] api/patches_api
# Loaded extensions:
#   sphinx.ext.graphviz (1.3.4) from /usr/lib64/python2.7/site-packages/sphinx/ext/graphviz.pyc
#   sphinxext.github (unknown version) from /var/tmp/portage/dev-python/matplotlib-1.5.1/work/matplotlib-1.5.1-python2_7/doc/sphinxext/github.py
#   sphinx.ext.autodoc (1.3.4) from /usr/lib64/python2.7/site-packages/sphinx/ext/autodoc.pyc
#   sphinx.ext.doctest (1.3.4) from /usr/lib64/python2.7/site-packages/sphinx/ext/doctest.pyc
#   matplotlib.sphinxext.mathmpl (unknown version) from /var/tmp/portage/dev-python/matplotlib-1.5.1/work/matplotlib-1.5.1-python2_7/build/build/lib/matplotlib/sphinxext/mathmpl.py
#   matplotlib.sphinxext.plot_directive (unknown version) from /var/tmp/portage/dev-python/matplotlib-1.5.1/work/matplotlib-1.5.1-python2_7/build/build/lib/matplotlib/sphinxext/plot_directive.py
#   alabaster (0.7.7) from /usr/lib64/python2.7/site-packages/alabaster/__init__.pyc
#   sphinx.ext.inheritance_diagram (1.3.4) from /usr/lib64/python2.7/site-packages/sphinx/ext/inheritance_diagram.pyc
#   matplotlib.sphinxext.only_directives (unknown version) from /var/tmp/portage/dev-python/matplotlib-1.5.1/work/matplotlib-1.5.1-python2_7/build/build/lib/matplotlib/sphinxext/only_directives.py
#   numpydoc (unknown version) from /usr/lib64/python2.7/site-packages/numpydoc/__init__.pyc
#   sphinxext.gen_rst (unknown version) from /var/tmp/portage/dev-python/matplotlib-1.5.1/work/matplotlib-1.5.1-python2_7/doc/sphinxext/gen_rst.py
#   IPython.sphinxext.ipython_console_highlighting (unknown version) from /usr/lib64/python2.7/site-packages/IPython/sphinxext/ipython_console_highlighting.pyc
#   sphinxext.gen_gallery (unknown version) from /var/tmp/portage/dev-python/matplotlib-1.5.1/work/matplotlib-1.5.1-python2_7/doc/sphinxext/gen_gallery.py
#   sphinx.ext.autosummary (1.3.4) from /usr/lib64/python2.7/site-packages/sphinx/ext/autosummary/__init__.pyc
#   IPython.sphinxext.ipython_directive (unknown version) from /usr/lib64/python2.7/site-packages/IPython/sphinxext/ipython_directive.pyc
#   sphinxext.math_symbol_table (unknown version) from /var/tmp/portage/dev-python/matplotlib-1.5.1/work/matplotlib-1.5.1-python2_7/doc/sphinxext/math_symbol_table.py
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/sphinx/cmdline.py", line 244, in main
    app.build(opts.force_all, filenames)
  File "/usr/lib64/python2.7/site-packages/sphinx/application.py", line 266, in build
    self.builder.build_update()
  File "/usr/lib64/python2.7/site-packages/sphinx/builders/__init__.py", line 251, in build_update
    'out of date' % len(to_build))
  File "/usr/lib64/python2.7/site-packages/sphinx/builders/__init__.py", line 265, in build
    self.doctreedir, self.app))
  File "/usr/lib64/python2.7/site-packages/sphinx/environment.py", line 618, in update
    self._read_serial(docnames, app)
  File "/usr/lib64/python2.7/site-packages/sphinx/environment.py", line 638, in _read_serial
    self.read_doc(docname, app)
  File "/usr/lib64/python2.7/site-packages/sphinx/environment.py", line 791, in read_doc
    pub.publish()
  File "/usr/lib64/python2.7/site-packages/docutils/core.py", line 218, in publish
    self.apply_transforms()
  File "/usr/lib64/python2.7/site-packages/docutils/core.py", line 199, in apply_transforms
    self.document.transformer.apply_transforms()
  File "/usr/lib64/python2.7/site-packages/docutils/transforms/__init__.py", line 171, in apply_transforms
    transform.apply(**kwargs)
  File "/usr/lib64/python2.7/site-packages/sphinx/transforms.py", line 182, in apply
    apply_source_workaround(n)
  File "/usr/lib64/python2.7/site-packages/sphinx/util/nodes.py", line 53, in apply_source_workaround
    '\s*:\s*%s' % classifier.astext(), '', node.rawsource)
  File "/usr/lib64/python2.7/re.py", line 155, in sub
    return _compile(pattern, flags).sub(repl, string, count)
  File "/usr/lib64/python2.7/re.py", line 251, in _compile
    raise error, v # invalid expression
error: unbalanced parenthesis