Adding empty static this() causes exception

[Biotronic via Digitalmars-d-learn]

The simplest example of a cycle is probably this:

module A;
import B;

int n1 = 17;
static this() {
     n1 = n2;
}

//
module B;
import A;

int n2 = 42;
static this() {
     n2 = n1;
}

What's the value of n1 and n2 after module constructors are run? 
Since both module constructors can run arbitrary code, it's 
impossible to prove in the general case whether one of them 
depends on the other.

--
   Biotronic