[Cython] Cython 0.11 beta

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Stefan Behnel wrote:
> Robert Bradshaw wrote:
>   
>> After much development, it looks like Cython 0.11 is getting stable  
>> enough to release. Please try out the beta, which is the current tip  
>> of sage-devel.
>>     
>
> Thanks, Robert. I bet you meant "cython-devel", though. ;)
>
> I recently went through the remaining bugs for 0.11 and filtered out some
> that can wait for future releases. We should decide which of the remaining
>  bugs we consider blockers or critical for this release, and then
> concentrate on fixing those for the release candidate.
>
> http://trac.cython.org/cython_trac/report/3
>
> For my part, I think the bugs that generate wrong or dangerous code for
> built-in types are worth fixing (#166, #158). Also, most of what results in
> a compiler crash or a runtime crash is probably critical.
>   
Thanks. I've fixed one low hanging one and downgraded another buffer bug 
to minor.

I couldn't reproduce #43 myself. I think #143 could be partially fixed 
and made a feature request instead by at least disallowing the current 
way of typing local vars in pxd files, without necesarrily introducing a 
new way of doing it.

I'd prefer working on #151 next, if/when I can find the time for it (and 
will assign it to me if I start on it).

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.

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