Note that Throwable subclasses which extend this trait may extend any other Throwable subclass (eg. RuntimeException) and are not required to extend Throwable directly.

Instances of Throwable subclasses marked in this way should not normally be caught. Where catch-all behaviour is required ControlExceptions should be propagated, for example,

  import scala.util.control.ControlException

  try {
    // Body might throw arbitrarily
 } catch {
   case ce : ControlException => throw ce // propagate
   case t : Exception => log(t)           // log and suppress