java.lang.NullPointerException
   at com.sun.tools.javac.util.Log$DeferredDiagnosticHandler.report(Log.java:148)
   at com.sun.tools.javac.util.Log.report(Log.java:624)
   at com.sun.tools.javac.util.AbstractLog.mandatoryWarning(AbstractLog.java:189)
   at com.sun.tools.javac.comp.Check$7.report(Check.java:3181)
   at com.sun.tools.javac.code.DeferredLintHandler$1.report(DeferredLintHandler.java:97)
   at com.sun.tools.javac.comp.Check.checkSunAPI(Check.java:3176)
   at com.sun.tools.javac.comp.Attr.checkIdInternal(Attr.java:3674)
   at com.sun.tools.javac.comp.Attr.checkId(Attr.java:3521)
   at com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:3404)
   at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1886)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:611)
   at com.sun.tools.javac.comp.Attr.attribType(Attr.java:649)
   at com.sun.tools.javac.comp.Attr.attribType(Attr.java:642)
   at com.sun.tools.javac.comp.MemberEnter.attribImportType(MemberEnter.java:967)
   at com.sun.tools.javac.comp.MemberEnter.visitImport(MemberEnter.java:579)
   at org.netbeans.lib.nbjavac.services.NBJavadocMemberEnter.visitImport(NBJavadocMemberEnter.java:78)
   at com.sun.tools.javac.tree.JCTree$JCImport.accept(JCTree.java:572)
   at com.sun.tools.javac.comp.MemberEnter.memberEnter(MemberEnter.java:442)
   at com.sun.tools.javac.comp.MemberEnter.memberEnter(MemberEnter.java:454)
   at com.sun.tools.javac.comp.MemberEnter.visitTopLevel(MemberEnter.java:553)
   at org.netbeans.lib.nbjavac.services.NBJavadocMemberEnter.visitTopLevel(NBJavadocMemberEnter.java:72)
   at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:520)
   at com.sun.tools.javac.comp.MemberEnter.memberEnter(MemberEnter.java:442)
   at com.sun.tools.javac.comp.MemberEnter.complete(MemberEnter.java:1134)
   at com.sun.tools.javac.code.Symbol.complete(Symbol.java:437)
   at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:901)
   at com.sun.tools.javac.comp.Enter.complete(Enter.java:728)
   at com.sun.tools.javac.main.JavaCompiler.complete(JavaCompiler.java:1036)
   at com.sun.tools.javac.main.JavaCompiler.complete(JavaCompiler.java:788)
   at com.sun.tools.javac.jvm.ClassReader.fillIn(ClassReader.java:2543)
   at com.sun.tools.javac.jvm.ClassReader.complete(ClassReader.java:2438)
   at com.sun.tools.javac.code.Symbol.complete(Symbol.java:437)
   at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:901)
   at com.sun.tools.javac.code.Symbol$ClassSymbol.flags(Symbol.java:832)
   at com.sun.tools.javac.code.Symbol$TypeSymbol.getEnclosedElements(Symbol.java:611)
   at org.netbeans.modules.java.source.save.ElementOverlay$PackageElementWrapper.getEnclosedElements(ElementOverlay.java:773)
   at org.netbeans.modules.java.source.pretty.ImportAnalysis2.setImports(ImportAnalysis2.java:164)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.rewriteChildren(ImmutableTreeTranslator.java:533)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.visitCompilationUnit(ImmutableTreeTranslator.java:334)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.visitCompilationUnit(ImmutableTreeTranslator.java:94)
   at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:551)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.translate(ImmutableTreeTranslator.java:136)
   at org.netbeans.api.java.source.WorkingCopy$4.translate(WorkingCopy.java:697)
   at org.netbeans.api.java.source.WorkingCopy.processCurrentCompilationUnit(WorkingCopy.java:721)
   at org.netbeans.api.java.source.WorkingCopy.getChanges(WorkingCopy.java:899)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:647)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:634)
   at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:488)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:593)
   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:206)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:203)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:203)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:438)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:409)
   at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:655)
   at org.netbeans.modules.java.hints.FieldForUnusedParam$FixImpl.implement(FieldForUnusedParam.java:242)
   at org.netbeans.modules.editor.hints.HintsUI$1.run(HintsUI.java:810)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)