Dear Maintainer, so, we got the error figured out on our side. Some other package installed an outdated 'six.pyc' to '/usr/bin/'. Reportbug found that file and tried to use it with the aforementioned output. Obviously there is something wrong with that outdated file. When deleting the file, reportbug compiles its own 'six.pyc' from the package 'python3-six' and everything works out well. Additionally everything works fine with a self-compiled up-to-date 'six.pyc' from here: https://github.com/benjaminp/six.
Dear Dave, you may want to compare straces of opened files ( --> 'strace reportbug -e trace=open') between systems with a working reportbug package and systems with a malfunctioning reportbug package. Maybe you can find differences in the opened files and can determine, which of the dependencies of reportbug causes the errors on your side. This was how I found the error on our side. Best regards, Luca Rodehutskors
