Unexpected behavior when converting large numeric values to Int

[archevel]

When converting an json object with a large number as one of its values to a case classes that can only hold an ´Int´ there is no error. I would expect some exception to be thrown in this case since it could cause some really strange behaviour and hard to detect errors (for instance if the number is an id of some kind).

scala> :paste
// Entering paste mode (ctrl-D to finish)

case class Foo(num:Int)
object Foo {
  import spray.json.DefaultJsonProtocol._
  implicit val format = jsonFormat1(Foo.apply)
}

// Exiting paste mode, now interpreting.

defined class Foo
defined object Foo

scala> import spray.json.pimpString
import spray.json.pimpString

scala> """{"num":999999999999999999999999}""".parseJson.convertTo[Foo]
res1: Foo = Foo(-1593835521)

scala> s"""{"num":${Long.MaxValue}}""".parseJson.convertTo[Foo]
res2: Foo = Foo(-1)

The problem also occurs if we just convert to Ints.

scala> import spray.json.DefaultJsonProtocol._
import spray.json.DefaultJsonProtocol._

scala> import spray.json.pimpString
import spray.json.pimpString

scala> "999999999999999999999999".parseJson.convertTo[Int]
res1: Int = -1593835521

scala> s"${Long.MaxValue}".parseJson.convertTo[Int]
res2: Int = -1

[sirthias]

Yes, this is a very valid request.
Thanks for reporting!