Looks like very old bug with Win32::OLE (which Win32::Process::Info::WMI "uses") being not thread safe. E.g.: Re: free to wrong pool while global destruction : windows perl environment. And, yes, your example works (i.e. no such error) if Win32::Process::Info is "required" inside a sub instead of "used" globally.

In reply to Re: Win32::Process::Info and threads by vr
in thread Win32::Process::Info and threads by LineStown

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