is it bug?

[drug via Digitalmars-d-learn]

```
import std.container: RedBlackTree;

class Manager(TT, alias Cmp = "a<b")
{
     alias Container = RedBlackTree!(TT, Cmp);
     Container _cont;

     static init()
     {
         auto instance = new typeof(this)();
         instance._cont = new Container();
         return instance;
     }
}

unittest
{
     alias IntManager = Manager!int;
     auto im = IntManager.init();
}

void main() {}
```

run it using
	rdmd -unittest filename.d

it fails in a RedBlackTree unittest with 2.065 and 2.066, is it bug?