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_lxpanel.py", line 23, in <module>
    session = os.environ['DESKTOP_SESSION']
  File "/usr/lib/python3.4/os.py", line 633, in __getitem__
    raise KeyError(key) from None
KeyError: 'DESKTOP_SESSION'