[Pkg-utopia-maintainers] Bug#820174: network-manager: fails to start: "Failed at step NAMESPACE"

[Stephen Kitt]

Package: network-manager
Version: 1.1.92-1
Severity: important

Dear Maintainer,

The upgrade from 1.1.91-3 to 1.1.92-1 failed, with
NetworkManager.service unable to start the service. The logs say

Apr 06 10:07:14 heffalump.sk2.org systemd[1]: Starting Network Manager...
-- Subject: Unit NetworkManager.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit NetworkManager.service has begun starting up.
Apr 06 10:07:14 heffalump.sk2.org systemd[22314]: NetworkManager.service: Failed at step NAMESPACE spawning /usr/sbin/NetworkManager: Invalid argument
-- Subject: Process /usr/sbin/NetworkManager could not be executed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- The process /usr/sbin/NetworkManager could not be executed and failed.
--
-- The error number returned by this process is 22.
Apr 06 10:07:14 heffalump.sk2.org systemd[1]: NetworkManager.service: Main process exited, code=exited, status=226/NAMESPACE
Apr 06 10:07:14 heffalump.sk2.org systemd[1]: Failed to start Network Manager.
-- Subject: Unit NetworkManager.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit NetworkManager.service has failed.
--
-- The result is failed.
Apr 06 10:07:14 heffalump.sk2.org systemd[1]: NetworkManager.service: Unit entered failed state.
Apr 06 10:07:14 heffalump.sk2.org systemd[1]: NetworkManager.service: Failed with result 'exit-code'.


How should I go about debugging this?

Regards,

Stephen


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'testing'), (500, 'stable'), (200, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.4.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages network-manager depends on:
ii  adduser                3.114
ii  dbus                   1.10.8-1
ii  init-system-helpers    1.29
ii  isc-dhcp-client        4.3.3-8
ii  libbluetooth3          5.36-1
ii  libc6                  2.22-5
ii  libglib2.0-0           2.48.0-1
ii  libgnutls30            3.4.10-4
ii  libgudev-1.0-0         230-3
ii  libmm-glib0            1.4.14-1
ii  libndp0                1.4-2
ii  libnewt0.52            0.52.18-3
ii  libnl-3-200            3.2.27-1
ii  libnm0                 1.1.92-1
ii  libpam-systemd         229-3
ii  libpolkit-agent-1-0    0.105-14.1
ii  libpolkit-gobject-1-0  0.105-14.1
ii  libreadline6           6.3-8+b4
ii  libsoup2.4-1           2.52.2-1
ii  libsystemd0            229-3
ii  libteamdctl0           1.23-1
ii  libuuid1               2.27.1-6
ii  lsb-base               9.20160110
ii  policykit-1            0.105-14.1
ii  udev                   229-3
ii  wpasupplicant          2.3-2.3

Versions of packages network-manager recommends:
ii  crda            3.13-1+b1
ii  dnsmasq-base    2.75-1
ii  iptables        1.6.0-2
ii  iputils-arping  3:20150815-2
pn  modemmanager    <none>
ii  ppp             2.4.7-1+2

Versions of packages network-manager suggests:
pn  libteam-utils  <none>

-- no debconf information