java.lang.ClassCastException: java.lang.Boolean
        at org.netbeans.modules.java.hints.errors.Utilities.guessName(Utilities.java:103)
        at org.netbeans.modules.java.hints.introduce.IntroduceHint.computeError(IntroduceHint.java:359)
        at org.netbeans.modules.java.hints.introduce.IntroduceHint.run(IntroduceHint.java:294)
        at org.netbeans.modules.java.hints.introduce.IntroduceHint.run(IntroduceHint.java:125)
        at org.netbeans.api.java.source.JavaSource$CompilationJob.run(JavaSource.java:1675)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
        at java.util.concurrent.FutureTask.run(FutureTask.java:123)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
        at java.lang.Thread.run(Thread.java:613)