Steps to reproduce:
- Started reportbug-gtk
 - Entered package name
 - Clicked "Next"
 - Got message "Checking for newer versions at madison..."
 
What happened next
Crashed with:
Traceback (most recent call last):
  File "/usr/bin/reportbug", line 2285, in <module>
    main()
  File "/usr/bin/reportbug", line 1115, in main
    return iface.user_interface()
  File "/usr/bin/reportbug", line 1728, in user_interface
    latest_first=self.options.latest_first)
  File "/usr/lib/python3/dist-packages/reportbug/ui/gtk_ui.py", line 1763, in func
    args, kwargs = op.sync_pre_operation(*args, **kwargs)
TypeError: cannot unpack non-iterable NoneType objectWhat should happen instead
Next step in reportbug process.
Workaround:
- Edit /etc/reportbug.conf
 - Uncomment bts debian
 
See also https://bugs.debian.org/931467
Other notes:
$ reportbug --bts help Valid bug tracking systems: debian ubuntu guug pureos default
I'm not sure what should happen when the BTS is pureos. Should reports/lookups be performed against Debian or PureOS? What about Debian-specific projects like wnpp?