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ERROR: matplotlib.tests.test_backend_pgf.test_xelatex
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Traceback (most recent call last):
  File "/home/mdboom/python/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/home/mdboom/python/lib/python2.7/site-packages/matplotlib/testing/decorators.py", line 39, in failer
    result = f(*args, **kwargs)
  File "/home/mdboom/python/lib/python2.7/site-packages/matplotlib/tests/test_backend_pgf.py", line 30, in backend_switcher
    result = func(*args, **kwargs)
  File "/home/mdboom/python/lib/python2.7/site-packages/matplotlib/tests/test_backend_pgf.py", line 68, in test_xelatex
    compare_figure('pgf_xelatex.pdf')
  File "/home/mdboom/python/lib/python2.7/site-packages/matplotlib/tests/test_backend_pgf.py", line 40, in compare_figure
    plt.savefig(actual)
  File "/home/mdboom/python/lib/python2.7/site-packages/matplotlib/pyplot.py", line 475, in savefig
    return fig.savefig(*args, **kwargs)
  File "/home/mdboom/python/lib/python2.7/site-packages/matplotlib/figure.py", line 1228, in savefig
    self.canvas.print_figure(*args, **kwargs)
  File "/home/mdboom/python/lib/python2.7/site-packages/matplotlib/backend_bases.py", line 2089, in print_figure
    **kwargs)
  File "/home/mdboom/python/lib/python2.7/site-packages/matplotlib/backends/backend_pgf.py", line 717, in print_pdf
    raise RuntimeError("%s was not able to process your file.\n\nFull log:\n%s" % (texcommand, stdout))
UnboundLocalError: local variable 'stdout' referenced before assignment