See https://cplusplus.github.io/CWG/issues/2569.html
and the reflector thread starting at http://lists.isocpp.org/core/2022/04/12341.php
In short, P2036R3 #766 was approved as a Defect Report, but its changes make popular existing standard library implementations ill-formed. Thus, there is concern about too much breakage, in particular with the "DR" aspect of P2036R3.
Some possible approaches how to proceed are listed in the issue.
See https://cplusplus.github.io/CWG/issues/2569.html
and the reflector thread starting at http://lists.isocpp.org/core/2022/04/12341.php
In short, P2036R3 #766 was approved as a Defect Report, but its changes make popular existing standard library implementations ill-formed. Thus, there is concern about too much breakage, in particular with the "DR" aspect of P2036R3.
Some possible approaches how to proceed are listed in the issue.