java.lang.NullPointerException
        at org.netbeans.modules.editor.hints.HintsControllerImpl$1.run(HintsControllerImpl.java:182)
        at org.netbeans.editor.BaseDocument.render(BaseDocument.java:1217)
        at org.netbeans.modules.editor.hints.HintsControllerImpl.linePart(HintsControllerImpl.java:180)
        at org.netbeans.spi.editor.hints.ErrorDescriptionFactory.createErrorDescription(ErrorDescriptionFactory.java:101)
        at org.netbeans.modules.javadoc.hints.Analyzer.createErrorDescription(Analyzer.java:155)
        at org.netbeans.modules.javadoc.hints.Analyzer.analyze(Analyzer.java:198)
        at org.netbeans.modules.javadoc.hints.JavadocHintProvider.run(JavadocHintProvider.java:121)
        at org.netbeans.modules.java.hints.infrastructure.HintsTask$ScannerImpl.runAndAdd(HintsTask.java:219)
        at org.netbeans.modules.java.hints.infrastructure.HintsTask$ScannerImpl.scan(HintsTask.java:237)
        at org.netbeans.modules.java.hints.infrastructure.HintsTask$ScannerImpl.scan(HintsTask.java:183)
        at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:80)
        at com.sun.source.util.TreeScanner.scan(TreeScanner.java:90)
        at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:100)
        at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:98)
        at com.sun.source.util.TreeScanner.visitClass(TreeScanner.java:132)
        at org.netbeans.modules.java.hints.infrastructure.HintsTask$ScannerImpl.visitClass(HintsTask.java:269)
        at org.netbeans.modules.java.hints.infrastructure.HintsTask$ScannerImpl.visitClass(HintsTask.java:183)
        at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:605)
        at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:67)
        at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:91)
        at org.netbeans.modules.java.hints.infrastructure.HintsTask$ScannerImpl.scan(HintsTask.java:243)
        at org.netbeans.modules.java.hints.infrastructure.HintsTask$ScannerImpl.scan(HintsTask.java:183)
        at com.sun.source.util.TreeScanner.scan(TreeScanner.java:90)
        at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:100)
        at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:98)
        at com.sun.source.util.TreeScanner.visitCompilationUnit(TreeScanner.java:119)
        at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:483)
        at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:49)
        at org.netbeans.modules.java.hints.infrastructure.HintsTask$ScannerImpl.scan(HintsTask.java:255)
        at org.netbeans.modules.java.hints.infrastructure.HintsTask.computeHints(HintsTask.java:124)
        at org.netbeans.modules.java.hints.infrastructure.HintsTask.computeHints(HintsTask.java:112)
        at org.netbeans.modules.java.hints.infrastructure.HintsTask.run(HintsTask.java:163)
        at org.netbeans.modules.java.hints.infrastructure.HintsTask.run(HintsTask.java:86)
        at org.netbeans.api.java.source.JavaSource$CompilationJob.run(JavaSource.java:1661)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)