During Global Destruction, object destructors run in random order. This means sometimes an inner part of an object get destroyed before the thing that owns it. The solution is to clean more things up yourself before global destruction begins. In this case, I think probably the Win32::SerialPort module ought to check for global destruction and skip closing the handle.

But, you can solve this in your module, too. When you're writing a module affected by a global-destruction problem, add an END block that frees up any resources that you allocated during the setup of the module. END blocks run before global destruction, in the reverse order that modules were loaded.

Putting this at the end of Serial.pm should do the trick: 

END {
  undef $port; # free it before global destruction runs
}

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In reply to Re: Using Win32::SerialPort in a module by NERDVANA
in thread Using Win32::SerialPort in a module by jmClifford

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