scala.tools.nsc.symtab.Types$TypeError: missing arguments for method !! in trait ScalaActorRef;
follow this method with `_' if you want to treat it as a partially applied function
   at scala.tools.nsc.typechecker.Contexts$Context.error(Contexts.java:291)
   at scala.tools.nsc.typechecker.Infer$Inferencer.error(Infer.java:205)
   at scala.tools.nsc.typechecker.Infer$Inferencer.errorTree(Infer.java:209)
   at scala.tools.nsc.typechecker.Typers$Typer.adapt(Typers.java:789)
   at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.java:4224)
   at scala.tools.nsc.typechecker.Typers$Typer.typedSelect$1(Typers.java:3535)
   at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.java:4125)
   at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.java:4219)
   at scala.tools.nsc.typechecker.Typers$Typer.typedQualifier(Typers.java:4287)
   at scala.tools.nsc.typechecker.Typers$Typer.typedQualifier(Typers.java:4295)
   at scala.tools.nsc.interactive.Global.scala$tools$nsc$interactive$Global$$typeMembers(Global.java:809)
   at scala.tools.nsc.interactive.Global$$anonfun$getTypeCompletion$2.apply(Global.java:791)
   at scala.tools.nsc.interactive.Global$$anonfun$getTypeCompletion$2.apply(Global.java:791)
   at scala.tools.nsc.interactive.Global.respondGradually(Global.java:527)
   at scala.tools.nsc.interactive.Global.getTypeCompletion(Global.java:791)
   at scala.tools.nsc.interactive.CompilerControl$AskTypeCompletionItem.apply$mcV$sp(CompilerControl.java:287)
   at scala.tools.nsc.interactive.Global.pollForWork(Global.java:333)
   at scala.tools.nsc.interactive.PresentationCompilerThread.run(PresentationCompilerThread.java:22)