[Bug c++/104418] Error inheriting base class constructors by using-declaration

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104418

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
But this is invalid code with a similar error message:
struct B {
    B(int) {}
    B(int&&) {}
};
struct C : B {
    C(int a) : B{(int)a}{}
};

So the question is how is default constructor done, is it done with the cast
causing an rvalue or not?