This might not be relevant to the OP, but I'm not so sure about Open3, on win32 it can hang and create zombies.

See Pod::Wrap t/deparse_cmp.t, this test hangs/fails with "An operation was attempted on something that is not a socket." and creates zombies

In reply to Re^2: Bidirectional IPC with Expect and Passthrough by Anonymous Monk
in thread Bidirectional IPC with Expect and Passthrough by steve

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