java.lang.NullPointerException
   at com.sun.tools.javac.code.Types$HasSameArgs.visitMethodType(Types.java:2206)
   at com.sun.tools.javac.code.Types$HasSameArgs.visitMethodType(Types.java:2192)
   at com.sun.tools.javac.code.Type$MethodType.accept(Type.java:886)
   at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:3744)
   at com.sun.tools.javac.code.Types.hasSameArgs(Types.java:2189)
   at com.sun.tools.javac.code.Types.hasSameArgs(Types.java:2185)
   at com.sun.tools.javac.code.Types.hasSameArgs(Types.java:2181)
   at com.sun.tools.javac.code.Types$6.visitMethodType(Types.java:714)
   at com.sun.tools.javac.code.Types$6.visitMethodType(Types.java:628)
   at com.sun.tools.javac.code.Type$MethodType.accept(Type.java:886)
   at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:3744)
   at com.sun.tools.javac.code.Types.isSameType(Types.java:625)
   at com.sun.tools.javac.comp.TransTypes.visitMethodDef(TransTypes.java:470)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:674)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitClassDef(TreeTranslator.java:134)
   at com.sun.tools.javac.comp.TransTypes.translateClass(TransTypes.java:871)
   at com.sun.tools.javac.comp.TransTypes.translateClass(TransTypes.java:854)
   at com.sun.tools.javac.comp.TransTypes.translateClass(TransTypes.java:854)
   at com.sun.tools.javac.comp.TransTypes.visitClassDef(TransTypes.java:446)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:595)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.TransTypes.translate(TransTypes.java:425)
   at com.sun.tools.javac.comp.TransTypes.visitNewClass(TransTypes.java:612)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1377)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.TransTypes.translate(TransTypes.java:425)
   at com.sun.tools.javac.comp.TransTypes.translateArgs(TransTypes.java:190)
   at com.sun.tools.javac.comp.TransTypes.visitApply(TransTypes.java:598)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1326)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.TransTypes.translate(TransTypes.java:425)
   at com.sun.tools.javac.comp.TransTypes.visitExec(TransTypes.java:564)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1172)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:160)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:786)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.TransTypes.translate(TransTypes.java:425)
   at com.sun.tools.javac.comp.TransTypes.visitMethodDef(TransTypes.java:459)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:674)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitClassDef(TreeTranslator.java:134)
   at com.sun.tools.javac.comp.TransTypes.translateClass(TransTypes.java:871)
   at com.sun.tools.javac.comp.TransTypes.visitClassDef(TransTypes.java:446)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:595)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.TransTypes.translate(TransTypes.java:425)
   at com.sun.tools.javac.comp.TransTypes.visitNewClass(TransTypes.java:612)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1377)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.TransTypes.translate(TransTypes.java:425)
   at com.sun.tools.javac.comp.TransTypes.visitVarDef(TransTypes.java:482)
   at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:730)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:160)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:786)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.TransTypes.translate(TransTypes.java:425)
   at com.sun.tools.javac.comp.TransTypes.visitMethodDef(TransTypes.java:459)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:674)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitClassDef(TreeTranslator.java:134)
   at com.sun.tools.javac.comp.TransTypes.translateClass(TransTypes.java:871)
   at com.sun.tools.javac.comp.TransTypes.visitClassDef(TransTypes.java:446)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:595)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.TransTypes.translate(TransTypes.java:425)
   at com.sun.tools.javac.comp.TransTypes.translateTopLevelClass(TransTypes.java:898)
   at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1426)
   at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1316)
   at com.sun.tools.javac.api.JavacTaskImpl$2.process(JavacTaskImpl.java:534)
   at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:622)
   at com.sun.tools.javac.api.JavacTaskImpl.generate(JavacTaskImpl.java:537)
   at org.netbeans.modules.java.source.indexing.MultiPassCompileWorker.compile(MultiPassCompileWorker.java:291)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:232)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:158)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:259)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:156)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2457)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$1500(RepositoryUpdater.java:2057)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:2364)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:2362)
   at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:541)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:2362)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:2865)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:3218)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:2959)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:5187)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4800(RepositoryUpdater.java:4879)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2$1.run(RepositoryUpdater.java:5124)
   at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:96)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:5120)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:5116)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:72)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:5116)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
   at java.util.concurrent.FutureTask.run(FutureTask.java:138)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)