Private field and method use from subclass is inconsistent

class Foo {
  private String field = 'field'
  private String method() { 'method' }
}
class Bar extends Foo {
  def baz() {
    field // MissingPropertyException: No such property: field for class: Bar
    method() // MissingMethodException: No signature of method: Bar.method()
    this.field // MissingPropertyException: No such property: field for class: Bar
    this.method() // MissingMethodException: No signature of method: Bar.method()

    super.@field // MissingFieldException: No such field: field for class: Bar -- fixed by GROOVY-8999

    // so far, so good -- although Groovy allows access to private fields and methods from outside of Bar and Foo

    super.field // MissingMethodException: No signature of method: Bar.getField() -- that's strange
    super.method() // returns "method" -- Why is this okay?
    (super.&method)() // MissingMethodException: No signature of method: Bar.method() is applicable for argument types: () values: []
  }
}