Case Van Horsen <cas...@gmail.com> added the comment:

I maintain gmpy and it needs to calculate hash values for integers, floats, and 
rationals. I converted my hash calculations to use Py_ssize_t in a 64-bit 
Windows enviroment. All my tests pass when I build Python with my previous 
patch.

In hindsight, I think I made a mistake in my previous patch by eliminating 
Py_hash_t and using Py_ssize_t/size_t. I ended up defining Py_hash_t and 
Py_uhash_t in gmpy to simplify the code and to easily support older versions of 
Python.

I will work on a patch that defines Py_hash_t and Py_uhash_t and upload it 
later this evening.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue9778>
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