InspectionGadgets: Infinite recursion detection

The following methods is marked as "infinite recursion":

public double calculateOverTimeOverall() {
return calculateOverTime() + getPreviousMonth().calculateOverTimeOverall();
}


I think it is not a infinite recursion, cause "getPreviousMonth()" returns sometimes a subclass of this class --> overriden method --> no recurive call --> finite recursion...

What do u think?