[netbeans] runtime.BoxedXyzArray not found

With NB from current release68_fixes repository and using recent Scala (r20968) from trunk
I get plenty of error messages in NB log file (as shown below), and the NB plugin doesn't
work at all. Is it

- Scala itself or
- cooperating of the plugin with Scala

problem?

Andrew

//---------------------------------------------------------------

scala.tools.nsc.MissingRequirementError: class scala.runtime.BoxedBooleanArray not found.
at scala.tools.nsc.symtab.Definitions$definitions$.getModuleOrClass(Definitions.scala:483)
at scala.tools.nsc.symtab.Definitions$definitions$.getClass(Definitions.scala:441)
at scala.tools.nsc.symtab.Definitions$definitions$.newValueClass(Definitions.scala:577)
at scala.tools.nsc.symtab.Definitions$definitions$.BooleanClass(Definitions.scala:94)
at scala.tools.nsc.symtab.Definitions$definitions$.initValueClasses(Definitions.scala:600)
at scala.tools.nsc.symtab.Definitions$definitions$.init(Definitions.scala:743)
at scala.tools.nsc.Global$Run.(Global.scala:649)
at org.netbeans.modules.scala.core.interactive.Global$TyperRun.(Global.scala:578)
...
scala.tools.nsc.MissingRequirementError: class scala.runtime.BoxedIntArray not found.
at scala.tools.nsc.symtab.Definitions$definitions$.getModuleOrClass(Definitions.scala:483)
at scala.tools.nsc.symtab.Definitions$definitions$.getClass(Definitions.scala:441)
at scala.tools.nsc.symtab.Definitions$definitions$.newValueClass(Definitions.scala:577)
at scala.tools.nsc.symtab.Definitions$definitions$.IntClass(Definitions.scala:90)
at scala.tools.nsc.symtab.Constants$Constant.tpe(Constants.scala:62)
...