Initializing a class member that is an object

[ketmar]

Laurent Tréguier wrote:

> Is this behavior really intentional ?
yes. default values should be the same for all objects. it is predictable, 
and allows to initialize objects to the known state simply by blitting 
`.init`.

that is, default values aren't a syntax sugar for defining implicit ctor 
actions, they are executed once. this is by design.