scala.tools.nsc.MissingRequirementError: class scala.Array not found.
        at scala.tools.nsc.symtab.Definitions$definitions$.getModuleOrClass(Definitions.java:456)
        at scala.tools.nsc.symtab.Definitions$definitions$.getClass(Definitions.java:414)
        at scala.tools.nsc.symtab.Definitions$definitions$.ArrayClass(Definitions.java:186)
        at scala.tools.nsc.backend.icode.TypeKinds$REFERENCE.<init>(TypeKinds.java:247)
        at scala.tools.nsc.backend.icode.GenICode$ICodePhase.<init>(GenICode.java:48)
        at scala.tools.nsc.backend.icode.GenICode.newPhase(GenICode.java:39)
        at scala.tools.nsc.backend.icode.GenICode.newPhase(GenICode.java:24)
        at scala.tools.nsc.Global$Run$$anonfun$5.apply(Global.java:685)
        at scala.tools.nsc.Global$Run$$anonfun$5.apply(Global.java:684)
        at scala.collection.LinearSeqLike$class.foreach(LinearSeqLike.java:84)
        at scala.collection.immutable.List.foreach(List.java:29)
        at scala.tools.nsc.Global$Run.<init>(Global.java:684)
        at org.netbeans.modules.scala.core.interactive.Global$TyperRun.<init>(Global.java:584)
        at org.netbeans.modules.scala.core.interactive.Global.reloadSources(Global.java:291)
        at org.netbeans.modules.scala.core.interactive.Global.typedTreeAt(Global.java:311)
        at org.netbeans.modules.scala.core.interactive.Global.scopeMembers(Global.java:352)
        at org.netbeans.modules.scala.core.interactive.Global$$anonfun$getScopeCompletion$1.apply(Global.java:345)
        at org.netbeans.modules.scala.core.interactive.Global$$anonfun$getScopeCompletion$1.apply(Global.java:345)
        at org.netbeans.modules.scala.core.interactive.Global.respond(Global.java:282)
        at org.netbeans.modules.scala.core.interactive.Global.getScopeCompletion(Global.java:345)
        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:133)
        at org.netbeans.modules.scala.core.interactive.Global$$anon$2.run(Global.java:194)