[Pkg-libvirt-maintainers] Bug#758688: libvirt-daemon-system (1.2.7-9) dist-upgrade failed

[Yao Wei]

Package: libvirt-daemon-system
Version: 1.2.7-9
Followup-For: Bug #758688

I personally guess the prerm script assumes virtlockd service is up:
	deb-systemd-invoke stop virtlockd.socket virtlockd.service >/dev/null

The installation can continue after the following command:
	deb-systemd-invoke start virtlockd.socket virtlockd.service

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.14-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages libvirt-daemon-system depends on:
ii  adduser              3.113+nmu3
ii  gettext-base         0.19.2-1
ii  init-system-helpers  1.20
ii  libapparmor1         2.8.0-5.1+b2
ii  libaudit1            1:2.3.7-1
ii  libavahi-client3     0.6.31-4
ii  libavahi-common3     0.6.31-4
ii  libblkid1            2.20.1-5.8
ii  libc6                2.19-9
ii  libcap-ng0           0.7.3-1.1
ii  libdbus-1-3          1.8.6-2
ii  libdevmapper1.02.1   2:1.02.88-1
ii  libgnutls-deb0-28    3.2.16-1
ii  libnl-3-200          3.2.24-2
ii  libnl-route-3-200    3.2.24-2
ii  libnuma1             2.0.9-1.1
ii  librados2            0.80.5-1
ii  librbd1              0.80.5-1
ii  libsasl2-2           2.1.26.dfsg1-11
ii  libselinux1          2.3-1
ii  libssh2-1            1.4.3-3
ii  libsystemd-daemon0   208-7
ii  libvirt-clients      1.2.7-9
ii  libvirt-daemon       1.2.7-9
ii  libvirt0             1.2.7-9
ii  libxml2              2.9.1+dfsg1-4
ii  libyajl2             2.1.0-1
ii  logrotate            3.8.7-1

Versions of packages libvirt-daemon-system recommends:
ii  bridge-utils  1.5-9
ii  dmidecode     2.12-3
ii  dnsmasq-base  2.71-1
ii  ebtables      2.0.10.4-3
ii  iproute2      3.16.0-1
ii  iptables      1.4.21-2
ii  parted        3.2-4
ii  pm-utils      1.4.1-15

Versions of packages libvirt-daemon-system suggests:
pn  apparmor     <none>
pn  auditd       <none>
ii  policykit-1  0.105-6.1
pn  radvd        <none>
ii  systemd      208-7
pn  systemtap    <none>

-- Configuration Files:
/etc/libvirt/qemu.conf [Errno 13] Permission denied: u'/etc/libvirt/qemu.conf'

-- no debconf information