> Otherwise we are starting to open a far larger can of worms 
> than I think anybody wants to deal with.  For example, I
> challenge ANYBODY on this list to tell me (WITHOUT trying
> it and WITHOUT reading the code involved) the
> behaviour and/or result of the following:
> 
> 	| oc |
> 	oc _ OrderedCollection with: #foo.
> 	^oc addAll: oc.
> 
> (Small, and definitely alcoholic, prize in the bar at OOPSLA 
> for the first correct answer out of the hat.  [And if anybody
> comes up with the correct answer, I _will_ know that they've
cheated!])

Boy, that's one of the nicest and most obscure examples I've ever seen.
My initial guess was that it would loop infinitely but then I tried and
I still don't get the result... Thanks for finding this!

Cheers,
  - Andreas