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Sorry to come back on that, but how to do that in a C function (ie the send_message function, typically) ?
I do not see how i can remove the variable from the C api.

Le 01/03/2011 12:30, Tony Finch a écrit :
On Tue, 1 Mar 2011, Sylvain Fabre wrote:
Le 28/02/2011 18:22, Tony Finch a écrit :
There is no single variable that refers to the userdata. You will have to
mutate it in place to invalidate it.
Hum... :) What do you mean by "mutate it in place to invalidate it" ?
Change the contents of the userdata itself so that it is no longer a valid
instance of its original type.


Sylvain FABRE
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