Bug#706758: python-scientific: preinst/prerm uses python, but python is not configured during upgrades

[Andreas Beckmann]

Package: python-scientific
Version: 2.8-4
Severity: serious
User: debian-qa at lists.debian.org
Usertags: piuparts
Control: affects -1 + python-mpi python

Hi,

during a test with piuparts I noticed your package fails to upgrade from
'squeeze'.
It installed fine in 'squeeze', then the upgrade to 'wheezy' fails.

>From the attached log (scroll to the bottom...):

  The following NEW packages will be installed:
    ... libssl1.0.0 ...

  Selecting previously deselected package python2.7-minimal.
  (Reading database ... 8561 files and directories currently installed.)
  Unpacking python2.7-minimal (from .../python2.7-minimal_2.7.3-6_i386.deb) ...

  Preparing to replace python-mpi 2.8-1.2 (using .../python-mpi_2.8-4_all.deb) ...
  INFO: using unknown version '/usr/bin/python2.7' (debian_defaults not up-to-date?)
  Unpacking replacement python-mpi ...
  Preparing to replace python2.6 2.6.6-8+b1 (using .../python2.6_2.6.8-1.1_i386.deb) ...
  Unpacking replacement python2.6 ...
  Preparing to replace python2.6-minimal 2.6.6-8+b1 (using .../python2.6-minimal_2.6.8-1.1_i386.deb) ...
  Unpacking replacement python2.6-minimal ...
  Preparing to replace python-scientific 2.8-1.2 (using .../python-scientific_2.8-4_all.deb) ...
  /usr/bin/python: error while loading shared libraries: libssl.so.1.0.0: cannot open shared object file: No such file or directory
  dpkg: warning: subprocess old pre-removal script returned error exit status 127
  dpkg: trying script from the new package instead ...
  /usr/bin/python: error while loading shared libraries: libssl.so.1.0.0: cannot open shared object file: No such file or directory
  dpkg: error processing /var/cache/apt/archives/python-scientific_2.8-4_all.deb (--unpack):
   subprocess new pre-removal script returned error exit status 127
  configured to not write apport reports
  /usr/bin/python: error while loading shared libraries: libssl.so.1.0.0: cannot open shared object file: No such file or directory
  dpkg: error while cleaning up:
   subprocess installed post-installation script returned error exit status 127
  Processing triggers for python-support ...
  /usr/bin/python: error while loading shared libraries: libssl.so.1.0.0: cannot open shared object file: No such file or directory
  dpkg: error processing python-support (--unpack):
   subprocess installed post-installation script returned error exit status 127
  configured to not write apport reports
  Errors were encountered while processing:
   /var/cache/apt/archives/python-scientific_2.8-4_all.deb
   python-support

Python (indirectly) depends on libssl1.0.0, but that was not yet unpacked while the
newer python* already got unpacked.

There were also similar problems where python was a dangling symlink and not
usable at all...


cheers,


Andreas
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