[libc++] `make_optional(initializer_list<_Up> __il, _Args&&... __args)` is underconstrained

[hewillk]

#include <optional>

int main() {
  struct S { int x; int y; };
  auto a = std::make_optional<S>({1, 2});
}

https://godbolt.org/z/hfnTWhbYW

make_optional(initializer_list<U> il, Args&&... args) is equivalent to: return optional<T>(in_place, il, std​::​forward<Args>(args)...);
So it shouldn't participate in overload resolution because the optional's constructor constraint is not satisfied?

[frederick-vs-ja]

I reported this years ago... Perhaps I or someone else should fix it soon.