Mark Dickinson <dicki...@gmail.com> added the comment:

It's surprising that test_ulonglong fails, while test_longlong passes:  can the 
Linux Sparc ABI really be treating these two types differently?

Maybe more information could be gained by supplying a more interesting test 
value than 42---some 8-byte value with all bytes different, for example.

In any case, this seems likely to be a libffi bug somewhere;  maybe we could 
bring it up on the libffi mailing list.  If we can translate the failing Python 
code into failing C code first that would probably increase the chances of 
getting a good answer.  Without access to Sparc hardware, I don't see much 
other way of making progress here.

----------
nosy: +mark.dickinson

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<http://bugs.python.org/issue8314>
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