Optional Standard library hardening is an ongoing active topic. -----Ursprüngliche Nachricht----- Von:Adrian Johnston via Std-Proposals <std-proposals_at_[hidden]> I was just reading the steering groups paper: https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2026/p2000r5.pdf And safety is a major focus coming from them. So I would love to see P2900 style assertions put into the standard library instead of having UB everywhere. That would also allow an evaluation semantics mode "assume" as I described previously to leverage those assertions where it was deemed safe to do so.