[REG 2.063] IFTI doesn't work with TemplateThisParameter and inheritance #18981

Maybe I don't understand what TemplateThisParameter is for, but I'd think this should work:

/////////// test.d //////////
class A
{
    final void f(this This)()
    {
        pragma(msg, This);
    }
}

class B : A
{
    final void x()
    {
        f();
    }
}
/////////////////////////////

I would expect f to be instantiated with This==B.