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Thu Oct 6 01:05:39 CEST 2011 · http://mail.python.org/pipermail/python-dev/2011-October/113863.html

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