call site 12 for path.local.__div__
test/testing/test_session.py - line 24
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   def check_conflict_option(opts):
       print "testing if options conflict:", " ".join(opts)
->     config = py.test.config._reparse(opts + [datadir/'filetest.py'])
       py.test.raises((ValueError, SystemExit), """
           config.initsession()
       """)