I was asking this same question myself.

Take out your "die" and it becomes evident what happens

The fork inside open3 (and yes, it does fork) forks the PROCESS. The whole thing. So your parent continues to run as normal, and, as the docs for IPC::open3 say, it does NOT wait for the child to run.

Therefore, the child keeps running after the parent is finished, dies and hits the die in your main program (because it forks the entire process).
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In reply to Re^3: delayed die and open3 by RazorbladeBidet
in thread delayed die and open3 by Random_Walk

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