https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89700
--- Comment #6 from Antony Polukhin <antoshkka at gmail dot com> --- Another way to workaround the warning is to use something like `my_class(my_class&) requires false;`. That's too ugly to use. I'd be fine with closing this issue as a 'won't fix'.
