protected-constructors.scala:15: error: class Foo3 in object Ding cannot be accessed in object dingus.Ding
 Access to protected class Foo3 not permitted because
 enclosing object P in package hungus is not a subclass of
 object Ding in package dingus where target is defined
    class Bar3 extends Ding.Foo3("abc")
                            ^
protected-constructors.scala:15: error: no arguments allowed for nullary constructor Object: ()Object
    class Bar3 extends Ding.Foo3("abc")
                                 ^
protected-constructors.scala:17: error: no arguments allowed for nullary constructor Foo1: ()dingus.Foo1
    val foo1 = new Foo1("abc")
                        ^
protected-constructors.scala:18: error: constructor Foo2 in class Foo2 cannot be accessed in object P
 Access to protected constructor Foo2 not permitted because
 enclosing object P in package hungus is not a subclass of
 class Foo2 in package dingus where target is defined
    val foo2 = new Foo2("abc")
               ^
protected-constructors.scala:19: error: class Foo3 in object Ding cannot be accessed in object dingus.Ding
 Access to protected class Foo3 not permitted because
 enclosing object P in package hungus is not a subclass of
 object Ding in package dingus where target is defined
    val foo3 = new Ding.Foo3("abc")
                        ^
5 errors found