It is defined as class method, but used as static one.
PR #1292
I just hit this by trying the view the build list for a tag in the web ui. A more direct way to hit it is via an api call:
lkoji call countAndFilterResults '"listPackages"' --kwargs '{"filterOpts": {"order": "package_name"}}'
This affects both py2 and py3
Commit cb6e42b4 fixes this issue
Commit ed155569 fixes this issue
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/koji/issues/1291
Please continue any further discussion there.