[Bug c++/108669] [diagnostic] missing error when std::vector of incomplete type has member referenced

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108669

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
What I thought would be a reduced testcase is correctly rejected:
#include <type_traits>

struct B;

template<typename T>
struct v
{
    static_assert(std::is_destructible<T>::value);
};

struct A {
    v<B> _;
};

A a{};  // <--here

struct B {};

So maybe I am missing something ...