Scala console/REPL becomes unresponsive when using parallel collections

Start the scala console (2.12) and paste the following snippet:

`List(1,2).par.foreach(println)`

After pressing return nothing will happen; when ".par" is removed, the code works as expected. 

(The example works as soon as the code snippet is put in a def: `object o { def run = List(1,2).par.foreach(println) }` and calling o.run runs fine. )
