How fix compilation error on spray example?

Question

Spray documentation has example about onComplete directive

I copied example:

path("divide" / IntNumber / IntNumber) { (a, b) =>
        onComplete(divide(a, b)) {
          case Success(value: Any) => complete(s"The result was $value")
          case Failure(ex)    => complete(StatusCodes.InternalServerError, s"An error occurred: ${ex.getMessage}")
        }
      }
def divide(a: Int, b: Int): Future[Int] = Future {
  a / b
}

And I got error:

Type mismatch, expected: onCompleteFutureMagnet[NoninferedT], actual Future[Int]

It is seems that something very simple missed in code.

Spray version is 1.3.1

Updated

I have downloaded spray sources and see same compilation errors in FutureDirectivesSpec.

Answer 1

import ExecutionContext.Implicits.global

works for me