According to cppreference since C++23

For a non-static non-virtual member function not declared with cv-qualifier or ref-qualifier, its first parameter, if not being a function parameter pack, can be an explicit object parameter (denoted with the prefixed keyword this).

Can this parameter be of type void? Current compilers allow it, but diverge in calling of such member function:

struct A {
    void f(this void) {}
};

// ok everywhere
auto p = &A::f;

int main() {
    // ok in GCC and MSVC
    p();

    // ok in Clang
    A{}.f();
}

Clang rejects p(); with the

error: called object type ‘void (A::*)()’ is not a function or function pointer

And GCC does not like A{}.f(); because

note: candidate expects -1 arguments, 0 provided

As well as MSVC:

error C2660: ‘A::f’: function does not take 0 arguments

Online demo: https://gcc.godbolt.org/z/zMaqaTTav

Which compiler is correct here?