apport_python_hook breaks under python-dbg unless you have python-apt-dbg installed

[Loïc Minier]

Hi,

If one doesn't have python-apt-dbg installed and runs:
% python-dbg -c 'import foo'
this is the result:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named foo
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/apport_python_hook.py", line 38, in apport_excepthook
    from apport.packaging_impl import impl as packaging
  File "/usr/lib/python2.5/site-packages/apport/__init__.py", line 1, in <module>
    from apport.report import Report
  File "/usr/lib/python2.5/site-packages/apport/report.py", line 21, in <module>
    import fileutils
  File "/usr/lib/python2.5/site-packages/apport/fileutils.py", line 16, in <module>
    from packaging_impl import impl as packaging
  File "/usr/lib/python2.5/site-packages/apport/packaging_impl.py", line 18, in <module>
    import apt
  File "/usr/lib/python2.5/site-packages/apt/__init__.py", line 2, in <module>
    import apt_pkg
ImportError: /usr/lib/python2.5/site-packages/apt_pkg.so: undefined symbol: Py_InitModule4_64

Original exception was:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named foo
[23315 refs]

After installing python-apt-dbg, the result is the expected one:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named foo
[29873 refs]

I think python-apport should either depend on python-apt-dbg or disable the hook for python*-dbg sessions.

Cheers,

[Marco Rodrigues (gothicx)]

It can be reproduced on karmic using $ python-dbg -c 'import apport'

[Martin Pitt (pitti)]

> I think python-apport should either depend on python-apt-dbg or disable the hook for python*-dbg sessions.

Introducing a dependency to python-apt-dbg sounds wrong, since we don't want to install python-dbg, python-apt-dbg and friends by default. This essentially seems to be a problem in the -dbg packages themselves, when having only some installed, but not the ones from dependencies. I don't think we can fix this in apport in any way, since it's a general problem.

[Matthias Klose (doko)]

so maybe provide a shell script which looks for installed modules and installs the corresponding -dbg package? in this case, this should be something for devscripts?

[Matthias Klose (doko)]

so it looks like this is something which cannot be done in python-defaults itself. site.py has:

+ # install the apport exception handler if available
+ try:
+ import apport_python_hook
+ except ImportError:
+ pass
+ else:
+ apport_python_hook.install()

so apport_python_hook should do the same try/except when trying to import the python-apt-dbg module.

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for apport (Ubuntu) because there has been no activity for 60 days.]