[issue1182] Paticular decimal mod operation wrongly output NaN.

[Mark Dickinson]

Mark Dickinson added the comment:

Unfortunately, I think this backport still breaks hash:

bernoulli:~/python_source/release25-maint dickinsm$ ./python.exe
Python 2.5.2a0 (release25-maint:59859M, Jan  8 2008, 11:54:53) 
[GCC 4.0.1 (Apple Computer, Inc. build 5370)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from decimal import *
>>> x = Decimal("1.634E100")
>>> hash(x) == hash(int(x))
False

Do we really want to go from a slow-but-working Decimal.__hash__ in Python 2.5.1 to a fast-but-
broken hash in Python 2.5.2?

I can fix this (it's a 1-line change), and reinstate the extra hash tests, if you like.  Or I can 
post a patch if you prefer.

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<http://bugs.python.org/issue1182>
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