package mixins;

import scala.collection.mutable._;

class Collections extends HashSet[Int] with ObservableSet[Int,Collections] {
  override def +=(elem: Int): Unit = super.+=(elem);
  override def -=(elem: Int): Unit = super.-=(elem);
  override def clear: Unit = super.clear;

}

object collections extends Collections;

class Collections1 extends HashSet[Int] with ObservableSet[Int,Collections1];
object collections1 extends Collections1;

Test case for abstract override bug in NSC.
Test case for abstract override bug in NSC.

