Bug#672208: python-dolfin: Extension module cpp not found/built

[LUK ShunTim]

Package: python-dolfin
Version: 1.0.0-4+b2
Severity: grave
Justification: renders package unusable

Dear Maintainer,

Here's an example traceback when running the poisson equation demo.

$ python demo_poisson.py
Traceback (most recent call last):
  File "demo_poisson.py", line 40, in <module>
    from dolfin import *
  File "/usr/lib/python2.7/dist-packages/dolfin/__init__.py", line 23, in <module>
    from dolfin.cppimports import *
  File "/usr/lib/python2.7/dist-packages/dolfin/cppimports.py", line 4, in <module>
    import dolfin.cpp as cpp
ImportError: No module named cpp

It seems that in the current (1.0.0-4+b2) version of python-dolfin, the extension module cpp is somehow not built. You can, for example, compare the size of the package files as seen in snapshot.debian.org

    python-dolfin_1.0.0-4+b1_amd64.deb
        Seen in debian on 2012-04-12 04:27:45 in /pool/main/d/dolfin.
        Size: 2068978

    python-dolfin_1.0.0-4+b2_amd64.deb
        Seen in debian on 2012-04-27 22:09:51 in /pool/main/d/dolfin.
        Size: 111986

Regards,
ST
-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (900, 'unstable'), (500, 'gutsy')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_HK.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages python-dolfin depends on:
ii  libdolfin1.0                      1.0.0-4+b2
ii  libdolfin1.0-dev                  1.0.0-4+b2
ii  python                            2.7.2-10
ii  python-ffc                        1.0.0-1
ii  python-instant                    1.0.0-1
ii  python-numpy [python-numpy-abi9]  1:1.6.1-8
ii  python-ufc                        2.0.5-1+b1
ii  python-ufl                        1.0.0-1
ii  python-viper                      1.0.0-1
ii  python2.7                         2.7.3~rc2-2.1
ii  swig2.0                           2.0.5-1

python-dolfin recommends no packages.

Versions of packages python-dolfin suggests:
pn  dolfin-doc  <none>

-- no debconf information