[Cython] Cython 0.11 beta

[Dag Sverre Seljebotn]

>>>> Sage passes doctests: Does that include detecting any leaks? The 
>>>> refnanny is not yet working, so I'd be wary of releasing until that is 
>>>> done unless we know that Sage doesn't leak more when Cython is upgraded.
>>> I don't think Robert did any testing, but I can do some valgrinding with 
>>> the upcoming 3.3.alpha3 with the old and the new 0.11 snapshot to see if 
>>> anything pops up. It will be a day or two until I have results.
>>>
>> My refcount nanny now seems to be in a state where it doesn't crash 
>> things (though there are spurious reports still from not following the 
>> refnanny convention), and I've discovered at least one genuine leak so 
>> far in the cython test suite.
> 
> Excuse my ignorance, but how do I turn on the refnanny in all the code? 
> I do not recall that being documented anywhere? I guess the best place 
> might be the wiki for that. Did anybody fix that leak you mentioned above?

No, I was just giving you a heads up for something I'm doing right now 
(and which is in experiment mode) -- running valgrind on Cython 0.11 may 
not be such a big point if I'm right about to get the refnanny in order, 
which will make those statistics outdated if the "refnanny effect" kicks in.

I found the leak while playing with the refnanny: 
http://trac.cython.org/cython_trac/ticket/199

Establishing a baseline is always good though :-)

Docs should be in wiki when it is more mature. There's some here:

http://article.gmane.org/gmane.comp.python.cython.devel/4045/

Basically, once the Cython test suite runs with the nanny, this would be 
needed for SAGE:
1) Somebody should get distutils to compile Cython/Runtime/refnanny.pyx
2) SAGE needs to load refnanny.so or similar using RTLD_GLOBAL
3) Then, import it as a Python module
4) Then, run the C compiler with CYTHON_REFNANNY defined on 
Cython-generated sources

Don't bother with it until it really works though :-)

-- 
Dag Sverre