On 3/26/2013 6:48 PM, Robert Bradshaw wrote:
On Tue, Mar 26, 2013 at 2:52 AM, Martin Fiers
<martin.fi...@intec.ugent.be> wrote:
Dear Cython developers,
I stumbled upon a strange error when using Cython. I made a minimal working
example, see attachment for the two necessary files. (btw I didn't find the
e-mail address of Robert Bradshaw so I could not request him for an account
on the issue tracker. Is it possible to put the bug on there?)
Sure. You should have my email now.
Thank you! I just sent a mail.
Also, thanks for replying so quickly. Replies follow inline.
To reproduce the bug:
1) Reboot to Windows :) (the bug only appears on Windows)
2) Run compile_bug.py to generate the Cython extension
3) Try to run the my_func_exposed function:
python
import complex_double
(does not crash)
complex_double.my_func_exposed(1,1j)
(crashes)
complex_double.my_func_exposed(1,1)
If I put a breakpoint in the code with gdb, jump in the code, and leave the
function again, it does not crash! Also, it is no problem on Linux.
It has to do with the fact that in the first case, a real value was used. In
the complex-value case, it does not crash. I went through the generated cpp
file and I don't see any issues there (the reason I use cpp is because it's
in a big project that needs cpp enabled; it is further linked and so on).
gcc version used: 4.6.2 (mingw)
cython version used: 0.18 (I did pip install Cython)
python version used: python 2.7.3 (MSC v.1500 32 bit).
Very strange. Does calling PyComplex_AsCComplex directly produce the
same crash? What about
I'm not sure how to call this directly. Do you mean by modifying the
generated cpp file and then manually building an extension module?
cdef complex double x = 1.0
This one works.
or
cdef object py_x = 1.0
cdef complex double x = py_x
This one crashes!
Regards,
Martin
?
- Robert
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ir. Martin Fiers
Photonics Research Group
Universiteit Gent - Ghent University
Sint-Pietersnieuwstraat 41
9000 Gent - Belgium
T + 32 9 264 34 48
E martin.fi...@intec.ugent.be
W www.caphesim.com
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