Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport/report.py", line 195, in _run_hook
    exec(compile(fd.read(), hook, 'exec'), symb)
  File "/usr/share/apport/package-hooks/source_libfm.py", line 23, in <module>
    session = os.environ['DESKTOP_SESSION']
  File "/usr/lib/python3.3/os.py", line 672, in __getitem__
    value = self._data[self.encodekey(key)]
KeyError: b'DESKTOP_SESSION'