java.lang.AssertionError: c = java.awt.Component tree.sym = java.awt.Component tree = 
public abstract class Component implements ImageObserver, MenuContainer, Serializable {
    private static final PlatformLogger log = PlatformLogger.getLogger("java.awt.Component");
    private static final PlatformLogger eventLog = PlatformLogger.getLogger("java.awt.event.Component");
    private static final PlatformLogger focusLog = PlatformLogger.getLogger("java.awt.focus.Component");
    private static final PlatformLogger mixingLog = PlatformLogger.getLogger("java.awt.mixing.Component");
    volatile transient ComponentPeer peer;
    transient Container parent;
    transient AppContext appContext;
    int x;
    int y;
    int width;
    int height;
    Color foreground;
    Color background;
    volatile Font font;
    Font peerFont;
    Cursor cursor;
    Locale locale;
    private transient GraphicsConfiguration graphicsConfig = null;
    transient BufferStrategy bufferStrategy = null;
    boolean ignoreRepaint = f
   at com.sun.tools.javac.util.Assert.error(Assert.java:162)
   at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4592)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4517)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4467)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4463)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4445)
   at com.sun.tools.javac.comp.Attr.visitClassDef(Attr.java:901)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitClassDef(NBAttr.java:70)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:764)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:605)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:674)
   at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4669)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4517)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4445)
   at com.sun.tools.javac.comp.Attr.attrib(Attr.java:4403)
   at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1376)
   at com.sun.tools.javac.api.JavacTaskImpl$4.process(JavacTaskImpl.java:485)
   at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:621)
   at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:488)
   at org.netbeans.modules.java.source.TreeLoader.loadTreeFor(TreeLoader.java:199)
   at com.sun.tools.javac.model.JavacElements.getTreeAndTopLevel(JavacElements.java:605)
   at com.sun.tools.javac.model.JavacElements.getDocComment(JavacElements.java:362)
   at org.netbeans.modules.java.source.JavadocEnv$2.run(JavadocEnv.java:271)
   at org.netbeans.modules.java.source.JavadocEnv$2.run(JavadocEnv.java:266)
   at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:486)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:609)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:153)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:137)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:204)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201)
   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.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:88)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:201)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:436)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:407)
   at org.netbeans.modules.java.source.JavadocEnv.getRawCommentFor(JavadocEnv.java:266)
   at org.netbeans.modules.java.source.JavadocEnv.access$1400(JavadocEnv.java:89)
   at org.netbeans.modules.java.source.JavadocEnv$JavadocMethod.documentation(JavadocEnv.java:365)
   at com.sun.tools.javadoc.DocImpl.comment(DocImpl.java:129)
   at com.sun.tools.javadoc.ExecutableMemberDocImpl.paramTags(ExecutableMemberDocImpl.java:139)
   at org.netbeans.modules.javadoc.hints.Analyzer.analyze(Analyzer.java:203)
   at org.netbeans.modules.javadoc.hints.JavadocHint.errorHint(JavadocHint.java:217)
   at sun.reflect.GeneratedMethodAccessor63.invoke(GeneratedMethodAccessor63.java:0)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:530)
   at org.netbeans.modules.java.hints.providers.code.CodeHintProviderImpl$WorkerImpl.createErrors(CodeHintProviderImpl.java:339)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.runHint(HintsInvoker.java:803)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.access$400(HintsInvoker.java:112)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.runAndAdd(HintsInvoker.java:662)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.scan(HintsInvoker.java:681)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.scan(HintsInvoker.java:615)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:91)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:106)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:103)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:114)
   at com.sun.source.util.TreeScanner.visitClass(TreeScanner.java:188)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:798)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:72)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:94)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.scan(HintsInvoker.java:687)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.scan(HintsInvoker.java:615)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:106)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:103)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:114)
   at com.sun.source.util.TreeScanner.visitCompilationUnit(TreeScanner.java:145)
   at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:579)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:53)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.scan(HintsInvoker.java:706)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHintsImpl(HintsInvoker.java:257)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:240)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:210)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:183)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:150)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:137)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:88)
   at org.netbeans.modules.java.source.JavaSourceAccessor$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)