The source of the problem *is* perlIO. Not the underlying Windows CRT calls. With the PerlIO #defines in place, you cannot even do:
Without perl crashing in a heap around your ears.
However, if in your XS code, you #undef stderr to bypass the ridiculous PerlIO redefinitions, things begin to work. But you also have to defeat all the other pointless PerlIO redefinitions.
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.