https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77395
Daniel Krügler <daniel.kruegler at googlemail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |daniel.kruegler@googlemail. | |com --- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> --- I think a better test-case is the following one, which does not depend on tuple at all: //################################# #include <type_traits> struct derived; struct base { operator derived & () &; operator derived const & () const &; operator derived && () &&; }; struct derived : base {}; static_assert(std::is_constructible<derived&&, base&&>::value, ""); int main() { } //#################################