scala ver 2.12.2 and parallel collection

[fr0ster]

I have simple project on scala.
I use SBT for build and test my project.
In SBT console i typed next code
"(0 to 10000).par.map(_+42)"
When i use scala ver 2.11.7 that all right.
When i use scala ver 2.12.1 or 2.12.3 that command execution dont terminate. I am novice in using of scala and sbt and i dont know where i can see more information about this problem.

Sorry for my Englash...

[som-snytt]

This issue is tracked as scala/scala-dev#195 which links to duplicates such as #8119