Comment 3 for bug 1363722

Here's a full stacktrace:

Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/usr/lib/python2.7/dist-packages/maascli/__main__.py", line 20, in <module>
    main()
  File "/usr/lib/python2.7/dist-packages/maascli/__init__.py", line 46, in main
    options.execute(options)
  File "/usr/lib/python2.7/dist-packages/maascli/api.py", line 171, in __call__
    self.op, self.method, uri, options.data)
  File "/usr/lib/python2.7/dist-packages/maascli/api.py", line 257, in prepare_payload
    headers, body = encode_multipart_message(message)
  File "/usr/lib/python2.7/dist-packages/apiclient/multipart.py", line 132, in encode_multipart_message
    generator.flatten(message)
  File "/usr/lib/python2.7/email/generator.py", line 83, in flatten
    self._write(msg)
  File "/usr/lib/python2.7/email/generator.py", line 108, in _write
    self._dispatch(msg)
  File "/usr/lib/python2.7/email/generator.py", line 134, in _dispatch
    meth(msg)
  File "/usr/lib/python2.7/email/generator.py", line 203, in _handle_multipart
    g.flatten(part, unixfrom=False)
  File "/usr/lib/python2.7/email/generator.py", line 83, in flatten
    self._write(msg)
  File "/usr/lib/python2.7/email/generator.py", line 108, in _write
    self._dispatch(msg)
  File "/usr/lib/python2.7/email/generator.py", line 134, in _dispatch
    meth(msg)
  File "/usr/lib/python2.7/email/generator.py", line 180, in _handle_text
    self._fp.write(payload)
OverflowError: length too large