scala.tools.nsc.MissingRequirementError: class scala.Array not found.
   at scala.tools.nsc.symtab.Definitions$definitions$.getModuleOrClass(Definitions.java:499)
   at scala.tools.nsc.symtab.Definitions$definitions$.getClass(Definitions.java:457)
   at scala.tools.nsc.symtab.Definitions$definitions$.ArrayClass(Definitions.java:212)
   at scala.tools.nsc.backend.icode.TypeKinds$REFERENCE.<init>(TypeKinds.java:258)
   at scala.tools.nsc.backend.icode.GenICode$ICodePhase.<init>(GenICode.java:53)
   at scala.tools.nsc.backend.icode.GenICode.newPhase(GenICode.java:41)
   at scala.tools.nsc.backend.icode.GenICode.newPhase(GenICode.java:25)
   at scala.tools.nsc.Global$Run$$anonfun$5.apply(Global.java:658)
   at scala.tools.nsc.Global$Run$$anonfun$5.apply(Global.java:657)
   at scala.collection.LinearSeqLike$class.foreach(LinearSeqLike.java:88)
   at scala.collection.immutable.List.foreach(List.java:29)
   at scala.tools.nsc.Global$Run.<init>(Global.java:657)
   at org.netbeans.modules.scala.core.interactive.Global$TyperRun.<init>(Global.java:588)
   at org.netbeans.modules.scala.core.interactive.Global.reloadSources(Global.java:303)
   at org.netbeans.modules.scala.core.interactive.Global.typedTreeAt(Global.java:323)
   at org.netbeans.modules.scala.core.interactive.Global.scopeMembers(Global.java:374)
   at org.netbeans.modules.scala.core.interactive.Global$$anonfun$getScopeCompletion$1.apply(Global.java:367)
   at org.netbeans.modules.scala.core.interactive.Global$$anonfun$getScopeCompletion$1.apply(Global.java:367)
   at org.netbeans.modules.scala.core.interactive.Global.respond(Global.java:290)
   at org.netbeans.modules.scala.core.interactive.Global.getScopeCompletion(Global.java:367)
   at org.netbeans.modules.scala.core.interactive.CompilerControl$$anon$5.apply(CompilerControl.java:114)
   at org.netbeans.modules.scala.core.interactive.CompilerControl$$anon$5.apply(CompilerControl.java:113)
   at org.netbeans.modules.scala.core.interactive.Global.pollForWork(Global.java:139)
   at org.netbeans.modules.scala.core.interactive.Global$$anon$2.run(Global.java:200)