java.lang.NullPointerException
   at com.sun.tools.javac.comp.Analyzer$LambdaAnalyzer.match(Analyzer.java:261)
   at com.sun.tools.javac.comp.Analyzer$LambdaAnalyzer.match(Analyzer.java:251)
   at com.sun.tools.javac.comp.Analyzer$StatementScanner.scan(Analyzer.java:422)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:57)
   at com.sun.tools.javac.tree.TreeScanner.visitApply(TreeScanner.java:203)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1606)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.comp.Analyzer$StatementScanner.scan(Analyzer.java:428)
   at com.sun.tools.javac.tree.TreeScanner.visitExec(TreeScanner.java:178)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1424)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.comp.Analyzer$StatementScanner.scan(Analyzer.java:428)
   at com.sun.tools.javac.comp.Analyzer.analyze(Analyzer.java:351)
   at com.sun.tools.javac.comp.Analyzer.analyzeIfNeeded(Analyzer.java:340)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:614)
   at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:631)
   at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1106)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:992)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:543)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:612)
   at com.sun.tools.javac.comp.Attr.visitIf(Attr.java:1575)
   at com.sun.tools.javac.tree.JCTree$JCIf.accept(JCTree.java:1393)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:543)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:612)
   at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:631)
   at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1106)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:992)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:543)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:612)
   at com.sun.tools.javac.comp.Attr.visitForeachLoop(Attr.java:1172)
   at com.sun.tools.javac.tree.JCTree$JCEnhancedForLoop.accept(JCTree.java:1132)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:543)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:612)
   at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:631)
   at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1106)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:992)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:543)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:612)
   at com.sun.tools.javac.comp.Attr.attribStatToTree(Attr.java:403)
   at com.sun.tools.javac.api.JavacTrees.attribStatToTree(JavacTrees.java:909)
   at com.sun.tools.javac.api.JavacTrees.getAttrContext(JavacTrees.java:869)
   at com.sun.tools.javac.api.JavacTrees.getScope(JavacTrees.java:748)
   at com.sun.tools.javac.api.JavacTrees.getScope(JavacTrees.java:128)
   at org.netbeans.modules.java.hints.introduce.IntroduceHint.addExpressionFixes(IntroduceHint.java:269)
   at org.netbeans.modules.java.hints.introduce.IntroduceHint.computeError(IntroduceHint.java:406)
   at org.netbeans.modules.java.hints.introduce.IntroduceHint.run(IntroduceHint.java:237)
   at org.netbeans.modules.java.hints.introduce.IntroduceHint.run(IntroduceHint.java:137)
   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$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:265)
   at org.openide.util.RequestProcessor$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)