TypeError: cannot concatenate 'str' and 'error' objects

[furlongm]

/etc/cron.daily/python-patchman:
patchman.localdomain : Traceback (most recent call last):
File "/usr/bin/patchman", line 593, in
main()
File "/usr/bin/patchman", line 588, in main
showhelp = process_args(args)
File "/usr/bin/patchman", line 578, in process_args
update_errata(args.force)
File "/usr/lib/python2.7/dist-packages/patchman/packages/utils.py", line 84, in update_errata
data = download_errata()
File "/usr/lib/python2.7/dist-packages/patchman/packages/utils.py", line 94, in download_errata
return gunzip(data)
File "/usr/lib/python2.7/dist-packages/patchman/util/init.py", line 149, in gunzip
error_message.send(sender=None, text='gunzip: ' + e)
TypeError: cannot concatenate 'str' and 'error' objects
run-parts: /etc/cron.daily/python-patchman exited with return code 1