Why can't I resize an array of associative arrays?

[Justin]

I'd like to have an array (plain vanilla) of associate arrays. I'm thinking of 
it as a sort of table, with the header for each column being the key of the 
element. Strangely, though, the following program simply doesn't work; it 
doesn't crash--it just hangs (before printing out the array length).

module test2;

import std.stdio,
        std.string;
        
static void main() {

        string[string][] arrayOfAAs;
        arrayOfAAs.length = 9;
        writefln(arrayOfAAs.length);

}