I ran through the test case and with the version of the dist-upgrader from -proposed (release-upgrader version '20.04.23' started) I did not receive a traceback. Additionally, the upgrade failed to calculate which is expected as that's where the SystemError was raised.
I ran through the test case and with the version of the dist-upgrader from -proposed (release-upgrader version '20.04.23' started) I did not receive a traceback. Additionally, the upgrade failed to calculate which is expected as that's where the SystemError was raised.