java.lang.NullPointerException at com.sun.tools.javac.util.Log$DeferredDiagnosticHandler.reportDeferredDiagnostics(Log.java:169) at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.showDiagnostics(JavacProcessingEnvironment.java:1260) at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1324) at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1355) at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1243) at com.sun.tools.javac.main.JavaCompiler.lambda$readSourceFile$151(JavaCompiler.java:934) at com.sun.tools.javac.code.ClassFinder.complete(ClassFinder.java:315) at com.sun.tools.javac.code.Symbol.complete(Symbol.java:636) at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:1325) at com.sun.tools.javac.code.Symbol$ClassSymbol.flags(Symbol.java:1250) at com.sun.tools.javac.code.Symbol$TypeSymbol.getEnclosedElements(Symbol.java:803) at org.netbeans.modules.java.source.save.ElementOverlay$PackageElementWrapper.getEnclosedElements(ElementOverlay.java:797) at org.netbeans.modules.java.source.pretty.ImportAnalysis2.setImports(ImportAnalysis2.java:165) at org.netbeans.api.java.source.WorkingCopy.processCurrentCompilationUnit(WorkingCopy.java:817) at org.netbeans.api.java.source.WorkingCopy.getChanges(WorkingCopy.java:1341) at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:697) at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:684) at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:523) at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:609) at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:153) at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:137) at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:204) at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201) at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176) at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360) at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141) at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:90) at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:201) at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104) at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:473) at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:444) at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:705) at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:342) at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:288) at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:270) at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.createAndAddElements(JavaRefactoringPlugin.java:351) at org.netbeans.modules.refactoring.java.plugins.ChangeParametersPlugin.prepare(ChangeParametersPlugin.java:236) at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare2(AbstractRefactoring.java:442) at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare(AbstractRefactoring.java:426) at org.netbeans.modules.refactoring.api.AbstractRefactoring.prepare(AbstractRefactoring.java:237) at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$Prepare.run(ParametersPanel.java:1090) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443) at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68) at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)