Is this a bug?

[Andrey via Digitalmars-d-learn]

Could anyone please explain to me, why do I have error message on 
this piece of code?

alias short Type1;
alias Type1[100]* Type2; // pointer to an array
struct Type3
{
	Type2 f
}
void foo()
{
    Type3* b;
    Type1  d;
    d = b.f[10]; // compilation error: cannot implicitly convert 
expression ((*b).f[10]) of type short[100] to short
    d = b.f[0][10]; // ok
}

Thank you in advance