spray.io如何使用scala 2.11.1 akka 2.3.2

spray 1.3.1 is built against Scala 2.10.3 and Akka 2.3.0 as well as Scala 2.11.1 and Akka 2.3.2.

当我使用spray-client时,我遇到了一些问题然后我在spray.io的Documentation页面中找到了以下内容：spray-client依赖于akka 2.10.x：

akka-actor 2.2.x (with ‘provided’ scope,i.e. you need to pull it in yourself)

提供的范围意味着什么？如何将它与scala 2.11.x akka 2.3.x中编写的程序的其他部分一起使用？

编辑

以下是documentation page中列出的最简单的用例：

import akka.actor.ActorSystem
import scala.concurrent.Future
object main {
  def main(args: Array[String]) {
    import spray.http._
    import spray.client.pipelining._
    implicit val system = ActorSystem()
    import system.dispatcher // execution context for futures
    val pipeline: HttpRequest => Future[HttpResponse] = sendReceive
    val response: Future[HttpResponse] = pipeline(Get("http://spray.io/"))
  }
}

使用build.sbt：

scalaVersion := "2.11.1"
libraryDependencies += "com.typesafe.akka" %% "akka-actor" % "2.3.2"
libraryDependencies += "io.spray" % "spray-client" % "1.3.1"

虽然编译得很好,但它符合运行时错误：

Uncaught error from thread [default-akka.actor.default-dispatcher-2] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled for ActorSystem[default]
java.lang.NoClassDefFoundError: scala/runtime/AbstractPartialFunction$mcVL$sp
  at ...