Wed, 10 Mar 2010 10:28:07 +0100, Johann Cohen-Tanugi wrote:
> On 03/10/2010 01:55 AM, Pauli Virtanen wrote:
>>> more fun :
>>> [co...@jarrett tests]$ pwd
>>> /home/cohen/sources/python/numpy/numpy/core/tests [co...@jarrett
>>> tests]$ python -c 'import test_ufunc' python: Modules/gcmodule.c:277:
>>> visit_decref: Assertion `gc->gc.gc_refs != 0' failed.
>>> Aborted (core dumped)
>>>
>> What happens if you only import the umath_tests module (or something,
>> it's a .so under numpy.core)?
>>
> [co...@jarrett core]$ export
> PYTHONPATH=/home/cohen/.local/lib/python2.6/site-packages/numpy/core:
$PYTHONPATH
> [co...@jarrett core]$ python
> Python 2.6.2 (r262:71600, Jan 25 2010, 18:46:45) [GCC 4.4.2 20091222
> (Red Hat 4.4.2-20)] on linux2 Type "help", "copyright", "credits" or
> "license" for more information.
> >>> import umath_tests
> >>>
> python: Modules/gcmodule.c:277: visit_decref: Assertion `gc->gc.gc_refs
> != 0' failed.
> Aborted (core dumped)
>
> so this import also trigger the crash at exit...
Then it is clear that the umath_tests module does something that is not
permitted. It's possible that there is a some sort of a refcount error
somewhere in the generalized ufuncs mechanisms -- that part of Numpy is
not heavily used.
Bug spotting challenge: Start from umath_tests.c.src:initumath_tests,
follow the execution, and spot the bug (if any).
Pauli
PS. it might be a good idea to file a bug ticket now
_______________________________________________
NumPy-Discussion mailing list
NumPy-Discussion@scipy.org
http://mail.scipy.org/mailman/listinfo/numpy-discussion
