[Python-Dev] Heads up: Apple llvm gcc 4.2 miscompiles PEP 393

[Guido van Rossum]

Thanks! More proof that debugging crosses *all* abstractions...

On Wed, Oct 5, 2011 at 4:05 PM, Ned Deily <nad at acm.org> wrote:
> In article
> <CAP7+vJKXsnjwwXD1aLgom1KRUPbtCSHiwAwZko1GPqaDnHWVKA at mail.gmail.com>,
>  Guido van Rossum <guido at python.org> wrote:
>> Is anyone on this thread interested in other weird Mac bugs? I had a
>> user complaining that on their Mac, with Python 2.5.6 from macports,
>> 2**63 was a negative number! That sounds like a compiler bug to me...
>>
>> http://code.google.com/p/appengine-ndb-experiment/issues/detail?id=65
>> (details about the versions involved are in comment 6)
>
> Thanks for the pointer.  That looks like a duplicate of Issue11149 (and
> Issue12701).  Another manifestation of this was reported in Issue13061
> which also originated from MacPorts.  I'll remind them that the
> configure change is likely needed for all Pythons.  It's still safest to
> stick with good old gcc-4.2 on OS X at the moment.
>
> --
>  Ned Deily,
>  nad at acm.org
>
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-- 
--Guido van Rossum (python.org/~guido)