Package: onioncircuits Version: 0.5-1 Followup-For: Bug #881496 This works for me now:
--8<---------------cut here---------------start------------->8--- $ apt-cache policy onioncircuits python3 apparmor onioncircuits: Installed: 0.5-1 Candidate: 0.5-1 Version table: *** 0.5-1 100 60 tor+http://httpredir.debian.org/debian testing/main amd64 Packages 70 tor+http://httpredir.debian.org/debian unstable/main amd64 Packages 100 /var/lib/dpkg/status 0.4-3 500 500 tor+http://httpredir.debian.org/debian stable/main amd64 Packages python3: Installed: 3.5.3-1 Candidate: 3.5.3-1 Version table: 3.6.3-2 70 60 tor+http://httpredir.debian.org/debian testing/main amd64 Packages 70 tor+http://httpredir.debian.org/debian unstable/main amd64 Packages *** 3.5.3-1 500 500 tor+http://httpredir.debian.org/debian stable/main amd64 Packages 100 /var/lib/dpkg/status apparmor: Installed: 2.11.1-3 Candidate: 2.11.1-3 Version table: *** 2.11.1-3 100 60 tor+http://httpredir.debian.org/debian testing/main amd64 Packages 70 tor+http://httpredir.debian.org/debian unstable/main amd64 Packages 100 /var/lib/dpkg/status 2.11.0-3 500 500 tor+http://httpredir.debian.org/debian stable/main amd64 Packages --8<---------------cut here---------------end--------------->8--- Downgrading to apparmor/stable still works. So, python3/stable + apparmor/{stable,testing} are OK. As the package doesn't suggest/recommend apparmor, it took me some time to realise it may be related to apparmor's rules. Upgrade to python3/testing and check logs: audit[3722]: AVC apparmor="DENIED" operation="file_mmap" profile="/usr/bin/onioncircuits" name="/usr/lib/python3.6/lib-dynload/_ctypes.cpython-36m-x86_64-linux-gnu.so" pid=3722 comm="onioncircuits" requested_mask="m" denied_mask="m" fsuid=1000 ouid=0 So, python3/testing + apparmor/testing is a breaking combination. Downgrading to apparmor/stable fixes the problem. -- System Information: Debian Release: buster/sid APT prefers stable APT policy: (500, 'stable'), (70, 'unstable'), (60, 'testing'), (50, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 4.13.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages onioncircuits depends on: ii gir1.2-glib-2.0 1.54.1-3 ii gir1.2-gtk-3.0 3.22.26-1 ii python3-gi 3.22.0-2 ii python3-pycountry 17.5.14+ds1-0.1 ii python3-stem 1.6.0-1 pn python3:any <none> onioncircuits recommends no packages. Versions of packages onioncircuits suggests: ii tor-geoipdb 0.3.1.8-2 -- no debconf information