NullPointerException with YouTube example mentioned in UserGuide

What steps will reproduce the problem?

1. Follow UserGuide to execute:

  import com.google.gdata.youtube._
  val s = new YouTubeService("learning-1.0")
  for (e <- s.getVideos(YouTubeQuery.empty / "Comedy")) println(e.rating)

2. Get a NullPointerException (with stack trace):

java.lang.NullPointerException
    at com.google.gdata.youtube.VideoEntries$$anonfun$videoEntryExtra$1$$anonfun$apply$19$$anonfun$apply$20.apply(VideoEntries.scala:153)
    at com.google.gdata.youtube.VideoEntries$$anonfun$videoEntryExtra$1$$anonfun$apply$19$$anonfun$apply$20.apply(VideoEntries.scala:153)
    at com.google.xml.combinators.Picklers$$anon$5.unpickle(Picklers.scala:437)
    at com.google.xml.combinators.Picklers$$anon$9.unpickle(Picklers.scala:361)
    at com.google.xml.combinators.Picklers$$anon$10.unpickle(Picklers.scala:392)
    at com.google.xml.combinators.Picklers$$anon$9.unpickle(Picklers.scala:361)
    at com.google.xml.combinators.Picklers$$anon$15.unpickle(Picklers.scala:509)
    at com.google.xml.combinators.Picklers$$anon$9.unpickle(Picklers.scala:359)
    at com.google.xml.combinators.Picklers$$anon$15.unpickle(Picklers.scala:509)
    at com.google.xml.combinators.Picklers$$anon$11.unpickle(Picklers.scala:403)
    at com.google.xml.combinators.Picklers$$anon$8.unpickle(Picklers.scala:343)
    at com.google.xml.combinators.Picklers$$anon$13.unpickle(Picklers.scala:448)
    at com.google.xml.combinators.Picklers$$anon$9.unpickle(Picklers.scala:361)
    at com.google.xml.combinators.Picklers$$anon$10.unpickle(Picklers.scala:392)
    at com.google.xml.combinators.Picklers$$anon$15.unpickle(Picklers.scala:509)
    at com.google.xml.combinators.Picklers$$anon$9.unpickle(Picklers.scala:359)
    at com.google.xml.combinators.Picklers$$anon$15.unpickle(Picklers.scala:509)
    at com.google.xml.combinators.Picklers$$anon$11.unpickle(Picklers.scala:403)
    at com.google.xml.combinators.Picklers$$anon$8.unpickle(Picklers.scala:343)
    at com.google.gdata.client.GDataRequest.unpickle(GDataRequest.scala:131)
    at com.google.gdata.Service.query(Service.scala:109)
    at com.google.gdata.Service.query(Service.scala:96)
    at com.google.gdata.youtube.YouTubeService.getVideos(YouTubeService.scala:70)
    at .<init>(<console>:12)
    at .<clinit>(<console>)
    at .<init>(<console>:11)
    at .<clinit>(<console>)
    at $export(<console>)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:592)
    at scala.tools.nsc.interpreter.IMain$Request$$anonfun$10.apply(IMain.scala:828)
    at scala.tools.nsc.interpreter.Line$$anonfun$1.apply$mcV$sp(Line.scala:43)
    at scala.tools.nsc.io.package$$anon$2.run(package.scala:31)
    at java.lang.Thread.run(Thread.java:680)

What is the expected output? What do you see instead?

Something like what is mentioned in the UserGuide

What version of the product are you using? On what operating system?

MacOSX 10.6.7 / Scala 2.9.0.RC2 / Java HotSpot(TM) 64-Bit Server VM, Java 
1.6.0_24

Please provide any additional information below.

I am a complete Scala noob. I will be investigating this issue independently 
(and hopefully provide meaningful feedback), but kindly also take a look.
Original issue reported on code.google.com by j...@patel.org.in on 28 Apr 2011 at 9:41
dsisnero / gdata-scala-client

NullPointerException with YouTube example mentioned in UserGuide #3
