__ipow__ method must ignore its third argument

[robertwb]

Evidently the Python position is that it's OK to pass garbage as the third argument of a .nb_inplace_pow() method; see http://bugs.python.org/issue1653736 and http://svn.python.org/view/python/branches/release25-maint/Objects/typeobject.c?r1=53690&r2=53689&pathrev=53690 . In this case, it might be a good idea to forbid the user from writing crashy code.

(I don't know how to trigger the particular call referenced above without the patch on http://trac.cython.org/ticket/561, and the next version of that patch will be changed to avoid the problem. So I don't know of an actual test case for this problem.)

At 2010-07-27T23:31:25Z @cwitty added attachment trac_562-ipow-crash.patch

Migrated from http://trac.cython.org/ticket/562

[robertwb]

@cwitty changed priority from major to minor
commented

Actually, I was wrong... the bug has nothing to do with http://trac.cython.org/ticket/561. This test case reliably segfaults for me, against current cython-devel. (I still don't think it's a major bug, though, since you have to do something quite strange to trigger it.)

[robertwb]

@cwitty changed cc to Carl.Witty@gmail.com
commented

[robertwb]

@robertwb commented

Merged test case http://hg.cython.org/cython-devel/rev/999a6d08631d

[robertwb]

@dalcinl changed resolution to fixed
status from new to closed
commented

Fixed, and test enabled:

490fc80
490fc80