Can you tell me the answers to those questions without checking the implementation?
Yes, of course. I've just written that code. I'm somewhat forgetful, but it's not that bad ...
Apart from that, maybe my hint was too subtle, but I think your sample code behaves quite differently from the OP's code. Shouldn't you have set the auto_deref option to true for your ArrayRef and HashRef accessors? Then again, maybe I'm not remembering this correctly. You know ... that memory thing ;-)
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