[Numpy-discussion] crash at prompt exit after running test

Johann Cohen-Tanugi cohen@lpta.in2p3...
Thu Mar 11 14:01:25 CST 2010


hi there, I am adding this to this thread and not to the trac, because I 
am not sure whether it adds noise or a piece of info. I just downloaded 
the scipy trunk and built it, and ran nosetests on it, which bombed 
instantly....
So I tried to get into subdirs to check test scripts separately..... and 
here is one :
[cohen@jarrett tests]$ ~/.local/bin/ipython test_integrate.py
---------------------------------------------------------------------------
AssertionError                            Traceback (most recent call last)

/home/cohen/sources/python/scipy/scipy/integrate/tests/test_integrate.py 
in <module>()
     208
     209 if __name__ == "__main__":
--> 210     run_module_suite()
     211
     212

/home/cohen/.local/lib/python2.6/site-packages/numpy/testing/nosetester.pyc 
in run_module_suite(file_to_run)
      75         f = sys._getframe(1)
      76         file_to_run = f.f_locals.get('__file__', None)
---> 77         assert file_to_run is not None
      78
      79     import_nose().run(argv=['',file_to_run])

AssertionError:
python: Modules/gcmodule.c:277: visit_decref: Assertion `gc->gc.gc_refs 
!= 0' failed.
Aborted (core dumped)
[cohen@jarrett tests]$ pwd
/home/cohen/sources/python/scipy/scipy/integrate/tests

the bomb is the same, but the context seems different... I leave that to 
the experts :)
Johann

On 03/10/2010 06:06 PM, Charles R Harris wrote:
>
>
> On Wed, Mar 10, 2010 at 10:39 AM, Bruce Southey <bsouthey@gmail.com 
> <mailto:bsouthey@gmail.com>> wrote:
>
>     On 03/10/2010 08:59 AM, Pauli Virtanen wrote:
>     > Wed, 10 Mar 2010 15:40:04 +0100, Johann Cohen-Tanugi wrote:
>     >
>     >> Pauli, isn't it hopeless to follow the execution of the source
>     code when
>     >> the crash actually occurs when I exit, and not when I execute.
>     I would
>     >> have to understand enough of this umath_tests.c.src to spot a
>     refcount
>     >> error or things like that????
>     >>
>     > Yeah, it's not easy, and requires knowing how to track this type of
>     > errors. I didn't actually mean that you should try do it, just
>     posed it
>     > as a general challenge to all interested parties :)
>     >
>     > On a more serious note, maybe there's a compilation flag or
>     something in
>     > Python that warns when refcounts go negative (or something).
>     >
>     > Cheers,
>     > Pauli
>     >
>     > _______________________________________________
>     > NumPy-Discussion mailing list
>     > NumPy-Discussion@scipy.org <mailto:NumPy-Discussion@scipy.org>
>     > http://mail.scipy.org/mailman/listinfo/numpy-discussion
>     >
>     Hi,
>     I think I managed to find this. I reverted back my svn versions ($svn
>     update -r 8262) and cleaned both the build and installation
>     directories.
>
>     It occurred with changeset 8262 (earlier changesets appear okay but
>     later ones do not)
>     http://projects.scipy.org/numpy/changeset/8262
>
>     Specifically in the file:
>     numpy/core/code_generators/generate_ufunc_api.py
>
>     There is an extra call to that should have been deleted on line 54(?).
>     Py_DECREF(numpy);
>
>     Attached a patch to ticket 1425
>     http://projects.scipy.org/numpy/ticket/1425
>
>
> Look like my bad. I'm out of town at the moment so someone else needs 
> to apply the patch. That whole bit of code could probably use a 
> daylight audit.
>
> Chuck
>
>
> -- 
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