Log/Handle serial.serialutil.SerialException(s)

[joedougherty]

My distractd process died recently, but this output was only available via console.

This should at least be logged. It really ought to throw some kind of non-silent error (perhaps as a notification itself)?

1.) Figure out how to reproduce error.
2.) Log.
3.) Find appropriate notification mechanism to let user know the process died.

Example traceback:

Traceback (most recent call last):
  File "/home/josepd/VENV/d2/lib/python3.6/site-packages/serial/serialposix.py", line 501, in read
    'device reports readiness to read but returned no data '
serial.serialutil.SerialException: device reports readiness to read but returned no data (device disconnected or multiple access on port?)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/josepd/VENV/d2/lib/python3.6/site-packages/distractinator/Distractinator.py", line 220, in run
    serialMsg = port.readline().strip()
  File "/home/josepd/VENV/d2/lib/python3.6/site-packages/serial/serialposix.py", line 509, in read
    raise SerialException('read failed: {}'.format(e))
serial.serialutil.SerialException: read failed: device reports readiness to read but returned no data (device disconnected or multiple access on port?)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/josepd/VENV/d2/lib/python3.6/site-packages/serial/serialposix.py", line 501, in read
    'device reports readiness to read but returned no data '
serial.serialutil.SerialException: device reports readiness to read but returned no data (device disconnected or multiple access on port?)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/josepd/VENV/d2/bin/distractd", line 11, in <module>
    sys.exit(main())
  File "/home/josepd/VENV/d2/lib/python3.6/site-packages/distractinator/__init__.py", line 5, in main
    d.run()
  File "/home/josepd/VENV/d2/lib/python3.6/site-packages/distractinator/Distractinator.py", line 228, in run
    serialMsg = port.readline().strip()
  File "/home/josepd/VENV/d2/lib/python3.6/site-packages/serial/serialposix.py", line 509, in read
    raise SerialException('read failed: {}'.format(e))
serial.serialutil.SerialException: read failed: device reports readiness to read but returned no data (device disconnected or multiple access on port?)