Hi Brian,

> On 19 Aug 2019, at 23:23, Brian Bi via Std-Proposals <std-proposals_at_[hidden]> wrote:
> Exactly - that means it's still undefined. As I said in one of my earlier messages, it is undesirable to change the standard in a way that breaks lots of code which people will then not rewrite, as this erodes the legitimacy of the standard (and leaves users uncertain about what might get trampled by their compiler optimizers the next time they update.) Yet that's exactly what happened in C++17, and we should fix that.

Could you please explain exactly what change in C++17 you are referring to here?

Thanks,
Timur