AA are weird in that AFAIK you need to "initialise" them before
you try to look suff up in them else they crash. i.e.
int[string] foo;
// auto e = "1" in foo; // crash AA not initialised
foo[ "blah"] = 0;
foo.remove("blah");
auto e = "1" in foo; //doesn't crash
It's not true. "Not initalzed" AA s just empty AA. http://dpaste.dzfl.pl/82b38a2ad504
