Access Violation Error & Rectangular Arrays

[xycos]

Hello,

I apologize for asking such n00bish questions... I come from a C#/Java 
background, and have never programmed with explicit pointers before.

Two questions -- First, why won't this work?

int main(char[][] args) {

    Bar baz = new Bar();
    for(int i = 0; i < 5; i++) {
        writefln(baz.arr[i].x);
    }
    return 0;

}

class Foo {

    public int x;

    this(int y) {
        x = y;
    }

}

class Bar {

    public Foo*[5] arr;

    public this() {
        for(int i = 0; i < 5; i++) {
            Foo z = new Foo(i);
            arr[i] = &z;
        }
    }

}

It gives me an "access violation"... The GC shouldn't have killed
anything; I still have pointers, neh?

Second question: Is there any way to define a rectangular array (one
of the optimized ones, not the dynamic-arrays-of-arrays things) that
has its size determined at compile time?

Thanks!
Best of wishes,
Robert