Comment 44 for bug 1669578

I did get the same result (pbuilder artful clean environment)
I also did try to reproduce autopkgtestsuite in an lxc container and the test has failed

sudo autopkgtest-build-lxc ubuntu artful
autopkgtest --shell-fail --apt-upgrade screen_4.5.1-3ubuntu1.dsc -- lxc --sudo autopkgtest-artful

the problem is that when the test fails, you get a shell inside the container, and prove -v debian/tests/t works there :(
culprit might be that screen -X and screen -Q stopped working