https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94117
Nathan Sidwell <nathan at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |SUSPENDED --- Comment #9 from Nathan Sidwell <nathan at gcc dot gnu.org> --- Discussing on the core list https://lists.isocpp.org/core/2020/03/8632.php (password required) I have a fix the the problem I encountered on the modules branch. Not suitable at this stage for trunk, and there's probably a better solution out there. As Marek says 'nobody implements this'