vim-pandoc-python-trace.txt

Traceback (most recent call last):
  File "/home/valeth/.xdg/share/vim/plugins/vim-pandoc/pythonx/vim_pandoc/async.py", line 39, in <module>
    Popen(command)
  File "/usr/lib/python3.4/subprocess.py", line 859, in __init__
    restore_signals, start_new_session)
  File "/usr/lib/python3.4/subprocess.py", line 1379, in _execute_child
    executable = os.fsencode(executable)
  File "/usr/lib/python3.4/os.py", line 770, in fsencode
    raise TypeError("expect bytes or str, not %s" % type(filename).__name__)
TypeError: expect bytes or str, not NoneType