Hello, Florian, I don't see any problem in this. Even if an extension function receives a pointer to a local variable, it should be fine as long as the variable is up the stack. Should it be downwards, it is undefined behavior anyways, linked or not. Maybe I have just misunderstood, can you please come up with a specific scenario, even better an example, where the problem occurs? Thank you, Marcel Plch _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx