It is wrongly assuming ...
But it documents these assumptions, http://search.cpan.org/~pjf/IPC-System-Simple-1.21/lib/IPC/System/Simple.pm#WINDOWS-SPECIFIC_NOTES
In reply to Re^4: autodie and IPC::System::Simple on Windows
by Anonymous Monk
in thread autodie and IPC::System::Simple on Windows
by JohnRS
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