Adjust some more code that was depending on the function and delegate calling conventions being equal. There's also an instance in `tango.text.convert.Layout` that should be adjusted: {{{ Index: tango/text/convert/Layout.d =================================================================== --- tango/text/convert/Layout.d (revision 4578) +++ tango/text/convert/Layout.d (working copy) -660,8 +660,12 @@ case TypeCode.STRUCT: auto s = cast(TypeInfo_Struct) type; - if (s.xtoString) - return Utf.fromString8 (s.xtoString(p), result); + if (s.xtoString) { + char[] delegate() toString; + toString.ptr = p; + toString.funcptr = cast(char[] function()) s.xtoString; + return Utf.fromString8 (toString(), result); + } goto default; case TypeCode.INTERFACE: }}}

module classes9;

class C
{
}

class D : C
{
}

class E
{
}

class F : E
{
}

void main()
{
    {
        D d = new D;
        {
            C c = d;
            assert(c !is null);
            D d2 = cast(D)c;
            assert(d2 !is null);
            E e = cast(E)d;
            assert(e is null);
            F f = cast(F)d;
            assert(f is null);
        }
    }
    {
        F f = new F;
        {
            E e = f;
            assert(e !is null);
            F f2 = cast(F)e;
            assert(f2 !is null);
            C c = cast(C)f;
            assert(c is null);
            D d2 = cast(D)f;
            assert(d2 is null);
        }
    }
}