Martin Panter added the comment:

Are there platforms where rlim_t is signed? Posix defines it as unsigned: 
<http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_resource.h.html>.

Also there are subtle differences between the PyLong_AsUnsigned[. . .] and the 
current signed versions. The unsigned version does not call __int__() so you 
would no longer be able to pass a float().

Also this could cause compatibility problems with code that was written for 
earlier documentation, which said to use -1 to mean unlimited. Perhaps that is 
why the code has rlim_* & RLIM_INFINITY masking.

----------
components: +Extension Modules -Library (Lib)
nosy: +martin.panter
stage: needs patch -> patch review

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue9917>
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