java.lang.NullPointerException
   at com.sun.tools.javac.comp.Analyzer$LambdaAnalyzer.match(Analyzer.java:274)
   at com.sun.tools.javac.comp.Analyzer$LambdaAnalyzer.match(Analyzer.java:264)
   at com.sun.tools.javac.comp.Analyzer$StatementScanner.scan(Analyzer.java:440)
   at com.sun.tools.javac.tree.TreeScanner.visitVarDef(TreeScanner.java:101)
   at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:926)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.comp.Analyzer$StatementScanner.scan(Analyzer.java:446)
   at com.sun.tools.javac.comp.Analyzer.analyze(Analyzer.java:364)
   at com.sun.tools.javac.comp.Analyzer.analyzeIfNeeded(Analyzer.java:353)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:706)
   at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:723)
   at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1205)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:990)
   at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:494)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:635)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:704)
   at com.sun.tools.javac.comp.Attr.attribStatToTree(Attr.java:412)
   at com.sun.tools.javac.api.JavacTrees.attribStatToTree(JavacTrees.java:975)
   at com.sun.tools.javac.api.JavacTrees.getAttrContext(JavacTrees.java:935)
   at com.sun.tools.javac.api.JavacTrees.getScope(JavacTrees.java:794)
   at com.sun.tools.javac.api.JavacTrees.getScope(JavacTrees.java:156)
   at org.netbeans.modules.java.hints.introduce.IntroduceHint.addExpressionFixes(IntroduceHint.java:274)
   at org.netbeans.modules.java.hints.introduce.IntroduceHint.computeError(IntroduceHint.java:439)
   at org.netbeans.modules.java.hints.introduce.IntroduceHint.run(IntroduceHint.java:242)
   at org.netbeans.modules.java.hints.introduce.IntroduceHint.run(IntroduceHint.java:142)
   at org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper.run(JavaSourceAccessor.java:298)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:584)
   at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:809)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304)
   at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.execute(TaskProcessor.java:725)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:686)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   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)