Null pointer in __vptr

Adam D Ruppe destructionator at
Fri Nov 19 15:46:41 UTC 2021

On Friday, 19 November 2021 at 15:37:59 UTC, frame wrote:
> Is a null pointer entry in the __vptr[] valid or always a sign 
> for corruption/wrong cast somewhere? thx

The `destroy` function (as well as other class destruction) will 
null out the whole vtable to help make use-after-free an obvious 
error. Possible that happened to you.

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