It's not really the output of an external command etc. I need. It's the STDERR of a C library which an XS module uses. So when I make certain sub calls, it gets into the C routines and it's their STDERR I want to capture. It all works fine on non-Windows using STDERR redirection to a file or Capture::Tiny but on Windows, the STDERR of the library refuses to be captured. This seems to be a windows specific thing - I read somewhere that re-opening STDERR on windows de-couples perl STDERR from the C library STDERR. If so, I'm really in the dark as to how to capture this.
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