NPE on worksheet save

[satyagraha]

Just created new worksheet, getting:

java.lang.NullPointerException
    at org.scalaide.worksheet.runtime.ProgramExecutor$$anonfun$act$1$$anonfun$apply$1.applyOrElse(ProgramExecutor.scala:122)
    at scala.runtime.AbstractPartialFunction$mcVL$sp.apply$mcVL$sp(AbstractPartialFunction.scala:33)
    at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:33)
    at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:25)
    at scala.actors.ReactorTask.run(ReactorTask.scala:31)
    at scala.actors.Reactor$class.resumeReceiver(Reactor.scala:129)
    at org.scalaide.worksheet.runtime.ProgramExecutor.scala$actors$InternalReplyReactor$$super$resumeReceiver(ProgramExecutor.scala:100)
    at scala.actors.InternalReplyReactor$class.resumeReceiver(InternalReplyReactor.scala:59)
    at org.scalaide.worksheet.runtime.ProgramExecutor.resumeReceiver(ProgramExecutor.scala:100)
    at scala.actors.InternalActor$class.searchMailbox(InternalActor.scala:76)
    at org.scalaide.worksheet.runtime.ProgramExecutor.searchMailbox(ProgramExecutor.scala:100)
    at scala.actors.Reactor$$anonfun$startSearch$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(Reactor.scala:117)
    at scala.actors.Reactor$$anonfun$startSearch$1$$anonfun$apply$mcV$sp$1.apply(Reactor.scala:114)
    at scala.actors.Reactor$$anonfun$startSearch$1$$anonfun$apply$mcV$sp$1.apply(Reactor.scala:114)
    at scala.actors.ReactorTask.run(ReactorTask.scala:33)
    at scala.actors.ReactorTask.compute(ReactorTask.scala:63)
    at scala.concurrent.forkjoin.RecursiveAction.exec(RecursiveAction.java:160)
    at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
    at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
    at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
    at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

Version info below: