mugshort Python traceback

sys:1: PyGIWarning: Gst was imported without specifying a version first. Use gi.require_version('Gst', '1.0') before import to ensure that the right version gets loaded.
sys:1: PyGIWarning: Cheese was imported without specifying a version first. Use gi.require_version('Cheese', '3.0') before import to ensure that the right version gets loaded.
sys:1: PyGIWarning: GtkClutter was imported without specifying a version first. Use gi.require_version('GtkClutter', '1.0') before import to ensure that the right version gets loaded.
Traceback (most recent call last):
  File "/usr/bin/mugshot", line 36, in <module>
    mugshot.main()
  File "/usr/lib/python3.5/site-packages/mugshot/__init__.py", line 46, in main
    window = MugshotWindow.MugshotWindow()
  File "/usr/lib/python3.5/site-packages/mugshot_lib/Window.py", line 52, in __new__
    new_object.finish_initializing(builder)
  File "/usr/lib/python3.5/site-packages/mugshot/MugshotWindow.py", line 202, in finish_initializing
    self.set_name_editable(SudoDialog.check_dependencies(['chfn']))
  File "/usr/lib/python3.5/site-packages/mugshot_lib/SudoDialog.py", line 60, in check_dependencies
    child = env_spawn('sudo -v', 1)
  File "/usr/lib/python3.5/site-packages/mugshot_lib/SudoDialog.py", line 84, in env_spawn
    child = pexpect.spawn(command, env)
  File "/usr/lib/python3.5/site-packages/pexpect/pty_spawn.py", line 194, in __init__
    self._spawn(command, args, preexec_fn, dimensions)
  File "/usr/lib/python3.5/site-packages/pexpect/pty_spawn.py", line 253, in _spawn
    raise TypeError('The argument, args, must be a list.')
TypeError: The argument, args, must be a list.