Brent 'Dax' Royal-Gordon wrote in perl.perl6.language :
>
> I would like "is sensitive" to be defined to mean that any data stored
> in that variable, at any level of recursion, will be zeroed out as
> soon as it is garbage collected.  Particular implementations can add
> extra features on top of that--such as stopping the VM from swapping
> it or even actively encrypting that area of memory--but without a
> minimum standard there's no point in supporting the feature at all.

That really sounds like an unportable feature that should go in a
module. On in many modules (Linux::VolatileVariables, etc etc)

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