[master] 46901a4d3 avoid potential assertion failures in pan_addr()

[Nils Goroll]

On 05/10/2020 15:36, Dridi Boukelmoune wrote:
> This should solve the risk of crash in VTCP_name() but session
> attributes can still trigger.

yes, that existed before, and not any more.

But we'll likely have the same issue elsewhere - in general, we should not deref
any pointers from structs with mismatched magic.

I won't clean up all the places (now) because I have not seen such an issue for
ages.

Nils

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