Unittest hangs on completion

[David Zhang via Digitalmars-d-learn]

Extracting everything into a main() also causes the application 
to hang.

ie:

struct S
{
     S* next;
}

S* _foo;
foreach (e; 0 .. 10)
     _foo = theAllocator.make!S(_foo);

S* next, current;
next = current = _foo;
while (next)
{
     next = current.next;
     theAllocator.dispose(current);
}