Bug#783802: devscripts: Fails to upgrade with a python error

[Vincent Fourmond]

Package: devscripts
Version: 2.15.3
Severity: important

  Hello,

  Today, the upgrade of devscripts failed with the following error:

Preparing to unpack .../devscripts_2.15.4_amd64.deb ...
Failed to import the site module
Traceback (most recent call last):
  File "/usr/lib/python3.4/site.py", line 586, in <module>
    main()
  File "/usr/lib/python3.4/site.py", line 572, in main
    known_paths = addusersitepackages(known_paths)
  File "/usr/lib/python3.4/site.py", line 287, in addusersitepackages
    user_site = getusersitepackages()
  File "/usr/lib/python3.4/site.py", line 263, in getusersitepackages
    user_base = getuserbase() # this will also set USER_BASE
  File "/usr/lib/python3.4/site.py", line 253, in getuserbase
    USER_BASE = get_config_var('userbase')
  File "/usr/lib/python3.4/sysconfig.py", line 597, in get_config_var
    return get_config_vars().get(name)
  File "/usr/lib/python3.4/sysconfig.py", line 540, in get_config_vars
    _init_posix(_CONFIG_VARS)
  File "/usr/lib/python3.4/sysconfig.py", line 412, in _init_posix
    from _sysconfigdata import build_time_vars
  File "/usr/lib/python3.4/_sysconfigdata.py", line 6, in <module>
    from _sysconfigdata_m import *
ImportError: No module named '_sysconfigdata_m'

  It feels like a missing (Pre-)Depends ?

  Cheers,

        Vincent

-- Package-specific info:

--- /etc/devscripts.conf ---

--- ~/.devscripts ---
DEBCHANGE_RELEASE_HEURISTIC=log

-- System Information:
Debian Release: 8.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.14-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages devscripts depends on:
iu  dpkg-dev     1.17.25
ii  libc6        2.19-18
iu  perl         5.20.2-4
ii  python3      3.4.2-2
pn  python3:any  <none>

Versions of packages devscripts recommends:
ii  at                          3.1.16-1
iu  curl                        7.42.1-1
ii  dctrl-tools                 2.23
pn  debian-keyring              <none>
pn  dput | dupload              <none>
pn  equivs                      <none>
ii  fakeroot                    1.20.2-1
ii  file                        1:5.22+15-2
ii  gnupg                       1.4.18-7
ii  libdistro-info-perl         0.14
ii  libencode-locale-perl       1.03-1
ii  libjson-perl                2.61-1
ii  liblwp-protocol-https-perl  6.06-2
ii  libparse-debcontrol-perl    2.005-4
ii  libsoap-lite-perl           1.11-1
ii  liburi-perl                 1.64-1
ii  libwww-perl                 6.08-1
pn  lintian                     <none>
ii  man-db                      2.7.0.2-5
ii  patch                       2.7.5-1
ii  patchutils                  0.3.3-1
ih  python3-debian              0.1.26
ii  python3-magic               1:5.22+15-2
ii  sensible-utils              0.0.9
ii  strace                      4.10-1
ii  unzip                       6.0-16
ii  wdiff                       1.2.2-1
ii  wget                        1.16.3-2
ii  xz-utils                    5.1.1alpha+20120614-2+b3

Versions of packages devscripts suggests:
ii  bsd-mailx [mailx]            8.1.2-0.20141216cvs-2
ii  build-essential              11.7
pn  cvs-buildpackage             <none>
pn  debbindiff                   <none>
pn  devscripts-el                <none>
ii  gnuplot                      4.6.6-2
ii  gpgv                         1.4.18-7
ii  libauthen-sasl-perl          2.1600-1
ii  libfile-desktopentry-perl    0.07-1
ii  libnet-smtp-ssl-perl         1.01-3
pn  libterm-size-perl            <none>
ii  libtimedate-perl             2.3000-2
pn  libyaml-syck-perl            <none>
ii  mutt                         1.5.23-3
iu  openssh-client [ssh-client]  1:6.7p1-6
pn  svn-buildpackage             <none>
iu  w3m                          0.5.3-20

-- no debconf information