with SynchronizedSet

What have I missed?

//-------------------

 # scala
Welcome to Scala version 2.8.0.r18375-b20090722041554 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_14).
Type in expressions to have them evaluated.
Type :help for more information.

scala> val m = new scala.collection.mutable.HashSet[String] with scala.collection.mutable.SynchronizedSet[String]
<console>:4: error: overriding method clone in class HashSet of type ()scala.collection.mutable.HashSet[String];
 method clone in trait SynchronizedSet of type ()scala.collection.mutable.Set[String] has incompatible type
      val m = new scala.collection.mutable.HashSet[String] with scala.collection.mutable.SynchronizedSet[String]
                  ^

scala>

On Wednesday 22 July 2009 21:18:56 you wrote:
> Looks like a bug.

Filed: https://lampsvn.epfl.ch/trac/scala/ticket/2183

>
> On Wed, Jul 22, 2009 at 2:13 AM, Andrew Gaydenko wrote:
> > What have I missed?
> >
> > //-------------------
> >
> > # scala
> > Welcome to Scala version 2.8.0.r18375-b20090722041554 (Java HotSpot(TM)
> > 64-Bit Server VM, Java 1.6.0_14).
> > Type in expressions to have them evaluated.
> > Type :help for more information.
> >
> > scala> val m = new scala.collection.mutable.HashSet[String] with
> > scala.collection.mutable.SynchronizedSet[String]
> > :4: error: overriding method clone in class HashSet of type
> > ()scala.collection.mutable.HashSet[String];
> > method clone in trait SynchronizedSet of type
> > ()scala.collection.mutable.Set[String] has incompatible type
> > val m = new scala.collection.mutable.HashSet[String] with
> > scala.collection.mutable.SynchronizedSet[String]
> > ^
> >
> > scala>