I was using $socket->close(), rather than your close $socket. They should be equivalent, I thought, but I also thought I had trouble (closed on both sides) when I did the OO version. I've put in your version, and it hasn't broken anything (and will presumably be more stable in heavy use and under adverse conditions).

In reply to Re^2: Socket descriptor passed across fork -- hanging by dd-b
in thread Socket descriptor passed across fork -- hanging by dd-b

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