Retrieving values from JsonBuffer does not work in 2.0.0-M7

[oleg-py]

Rapture 2.0.0-M7, Scala 2.11.8

Was doing some json-based storage for a little project and found that this innocent code:

object JsonBufferError extends App {
  import rapture.json._
  import jsonBackends.jawn._
  JsonBuffer.parse("""{"counter": 1}""").as[Json].counter.as[Long] // <-- this line works ok
  JsonBuffer.parse("""{"counter": 1}""").counter.as[Long] // <-- this line fails
}

Exception being:

Exception in thread "main" rapture.data.TypeMismatchException: type mismatch: Expected number but found object
    at rapture.json.jsonBackends.jawn.JawnAst$.getBigDecimal(ast.scala:68)
    at rapture.json.Extractors_1$$anon$6$$anonfun$extract$6.apply(extractors.scala:100)
    at rapture.json.Extractors_1$$anon$6$$anonfun$extract$6.apply(extractors.scala:100)
    at rapture.core.ThrowExceptionsMode.wrap(modes.scala:200)
    at rapture.json.Extractors_1$$anon$6.extract(extractors.scala:100)
    at rapture.json.Extractors_1$$anon$6.extract(extractors.scala:95)
    at rapture.data.Extractor$$anon$7$$anonfun$extract$7$$anonfun$apply$8.apply(extractors.scala:140)
    at rapture.core.ThrowExceptionsMode.unwrap(modes.scala:201)
    at rapture.data.Extractor$$anon$7$$anonfun$extract$7.apply(extractors.scala:140)
    at rapture.core.ThrowExceptionsMode.wrap(modes.scala:200)
    at rapture.data.Extractor$$anon$7.extract(extractors.scala:140)
    at rapture.data.Extractor$$anon$7$$anonfun$extract$7$$anonfun$apply$8.apply(extractors.scala:140)
    at rapture.core.ThrowExceptionsMode.unwrap(modes.scala:201)
    at rapture.data.Extractor$$anon$7$$anonfun$extract$7.apply(extractors.scala:140)
    at rapture.core.ThrowExceptionsMode.wrap(modes.scala:200)
    at rapture.data.Extractor$$anon$7.extract(extractors.scala:140)
    at rapture.json.Extractors_2$$anon$7.extract(extractors.scala:124)
    at rapture.json.Extractors_2$$anon$7.extract(extractors.scala:121)
    at rapture.data.DataType$class.as(data.scala:256)
    at rapture.json.JsonBuffer.as(json.scala:177)
    at JsonBufferError$.delayedEndpoint$JsonBufferError$1(JsonBufferError.scala:5)
    at JsonBufferError$delayedInit$body.apply(JsonBufferError.scala:1)
    at scala.Function0$class.apply$mcV$sp(Function0.scala:34)
    at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
    at scala.App$$anonfun$main$1.apply(App.scala:76)
    at scala.App$$anonfun$main$1.apply(App.scala:76)
    at scala.collection.immutable.List.foreach(List.scala:381)
    at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35)
    at scala.App$class.main(App.scala:76)
    at JsonBufferError$.main(JsonBufferError.scala:1)
    at JsonBufferError.main(JsonBufferError.scala)
    ...