[Pyrex] Bug in PySequence indexing

[Robert Bradshaw]

On May 29, 2008, at 3:51 PM, Greg Ewing wrote:

> Robert Bradshaw wrote:
>
>>     print sizeof(Py_ssize_t), "==", sizeof(unsigned long)
>>     D = { -1: "negative", <unsigned long>-1: "positive" }
>>     print D[<unsigned long>-1]
>
> I don't see how that has anything to do with integer
> indexing. You've already mangled your -1 by casting it
> to an unsigned long in the first place.

Casting the -1 was just for convenience to get something big enough.  
To rephrase the problem

     cdef unsigned long n = 4000000000 # who cares where this number  
comes from, it's probably not be a constant in the source.
     D = { n: "positive" }
     print D[n]

Raises a KeyError.

- Robert