Comment 1 for bug 1640318

The Traceback:

Traceback (most recent call last):
  File "/usr/lib/update-notifier/package-data-downloader", line 240, in process_download_requests
    print("%s: downloading %s" % (relfile, files[i]))
OSError: [Errno 5] Input/output error

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/update-notifier/package-data-downloader", line 305, in <module>
    process_download_requests()
  File "/usr/lib/update-notifier/package-data-downloader", line 263, in process_download_requests
    traceback.print_exc(file=sys.stderr)
  File "/usr/lib/python3.5/traceback.py", line 159, in print_exc
    print_exception(*sys.exc_info(), limit=limit, file=file, chain=chain)
  File "/usr/lib/python3.5/traceback.py", line 101, in print_exception
    print(line, file=file, end="")
OSError: [Errno 5] Input/output error

There is also a similar one with the print("%s: processing...") line.