A DESCRIPTION OF THE REQUEST :
CannotUndoException/CannotRedoException do not have constructors that allow you to pass the message parameter in, which is a standard optional parameter for all Throwables.

JUSTIFICATION :
Need to add another contstructor to CannotUndoException and CannotRedoException so that you can pass messages in -- in case you want to say why you can't undo or redo -- in the way they're fired now, there's no way to pass any additional information into these exceptions.


---------- BEGIN SOURCE ----------
Not a test case -- but the solution code to solve it, if you want to just copy and paste it into the next release.

public class CannotRedoException extends RuntimeException {
  public CannotRedoException() {
  }
  public CannotRedoException(String message) {
     super(message);
  }
}

public class CannotUndoException extends RuntimeException {
  public CannotUndoException() {
  }
  public CannotUndoException(String message) {
     super(message);
  }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Write debugging output when the exception is thrown. Since a subclasss can't go past the default constructor in the superclass, there's no real of getting around this.