Ambiguous Constructors

I found this snipet very confusing:

class Ambiguous(value: =>Unit){

def this() = this(println("invoking default constructor"))

def execute() = value

}

val amb = new Ambiguous{
println("invoking anonymous class constructor")
}

amb.execute

Output:

invoking anonymous class constructor
invoking default constructor

I was not specting an anonymous subclassing. I think the compiler
should raise a warning or an error to avoid these confusions.

- Andrés