This bug has annoyed me for a long time. I got it with a specified probability.
It shows like Error:Execution failed for task ':compileDebugScala'. > android/support/v4/app/DialogFragment$DialogStyle -- You received this message because you are subscribed to the Google Groups "scala-on-android" group. To unsubscribe from this group and stop receiving emails from it, send an email to scala-on-android+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
