scala.tools.nsc.MissingRequirementError: object scala not found.
   at scala.tools.nsc.symtab.Definitions$definitions$.getModuleOrClass(Definitions.java:653)
   at scala.tools.nsc.symtab.Definitions$definitions$.getModule(Definitions.java:603)
   at scala.tools.nsc.symtab.Definitions$definitions$.ScalaPackage(Definitions.java:145)
   at scala.tools.nsc.symtab.Definitions$definitions$.ScalaPackageClass(Definitions.java:146)
   at scala.tools.nsc.symtab.Definitions$definitions$.AnyClass(Definitions.java:176)
   at scala.tools.nsc.symtab.Definitions$definitions$.init(Definitions.java:811)
   at scala.tools.nsc.Global$Run.<init>(Global.java:694)
   at scala.tools.nsc.interactive.Global$TyperRun.<init>(Global.java:925)
   at scala.tools.nsc.interactive.Global.newTyperRun(Global.java:951)
   at scala.tools.nsc.interactive.Global.<init>(Global.java:166)
   at org.netbeans.modules.scala.core.interactive.Global.<init>(Global.java:13)
   at org.netbeans.modules.scala.core.ScalaGlobal.<init>(ScalaGlobal.java:88)
   at org.netbeans.modules.scala.core.ScalaGlobal$.getGlobal(ScalaGlobal.java:628)
   at org.netbeans.modules.scala.core.ScalaParserResult.<init>(ScalaParserResult.java:61)
   at org.netbeans.modules.scala.core.ScalaParserResult$.apply(ScalaParserResult.java:186)
   at org.netbeans.modules.scala.core.ScalaParser.parse(ScalaParser.java:99)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParse(TaskProcessor.java:598)
   at org.netbeans.modules.parsing.impl.SourceCache.getResult(SourceCache.java:236)
   at org.netbeans.modules.parsing.api.ResultIterator.getParserResult(ResultIterator.java:138)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:2837)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:586)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:155)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:139)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:198)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:198)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.indexEmbedding(RepositoryUpdater.java:2816)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2575)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$1200(RepositoryUpdater.java:2040)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2364)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2362)
   at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:544)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:2362)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork.scanSource(RepositoryUpdater.java:5034)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork.scanSources(RepositoryUpdater.java:4746)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RootsWork.getDone(RepositoryUpdater.java:4451)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:3059)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:5476)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4600(RepositoryUpdater.java:5142)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3$1.run(RepositoryUpdater.java:5401)
   at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:96)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3.call(RepositoryUpdater.java:5397)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3.call(RepositoryUpdater.java:5393)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:5393)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2044)