java.lang.AssertionError: Attr.visitNewClass tree [new Runnable(){
    
    () {
        super();
    }
    
    @Overr()
    public void run() {
        displayTestGroupsDialog();
    }
}] with constructor type [null] has symbol [symbol not found error] of kind [ 71]
   at com.sun.tools.javac.util.Assert.error(Assert.java:133)
   at com.sun.tools.javac.comp.Attr.visitNewClass(Attr.java:1869)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1377)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:453)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:426)
   at com.sun.tools.javac.comp.Attr.attribArgs(Attr.java:527)
   at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1545)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1326)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:453)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:426)
   at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:483)
   at com.sun.tools.javac.comp.Attr.visitExec(Attr.java:1323)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1172)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:453)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:426)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:503)
   at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:519)
   at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:944)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:786)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:453)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:426)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:503)
   at com.sun.tools.javac.comp.Attr.visitIf(Attr.java:1312)
   at com.sun.tools.javac.tree.JCTree$JCIf.accept(JCTree.java:1145)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:453)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:426)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:503)
   at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:519)
   at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:944)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:786)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:453)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:426)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:503)
   at com.sun.tools.javac.comp.Attr.attribStatToTree(Attr.java:367)
   at com.sun.tools.javac.api.JavacTrees.attribStatToTree(JavacTrees.java:340)
   at com.sun.tools.javac.api.JavacTrees.getAttrContext(JavacTrees.java:313)
   at com.sun.tools.javac.api.JavacTrees.getScope(JavacTrees.java:217)
   at com.sun.tools.javac.api.JavacTrees.getScope(JavacTrees.java:84)
   at org.netbeans.api.java.source.TreeUtilities.scopeFor(TreeUtilities.java:490)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery$Env.getScope(JavaCompletionProvider.java:5017)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.addLocalAndImportedTypes(JavaCompletionProvider.java:3085)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.addTypes(JavaCompletionProvider.java:3072)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.insideAnnotation(JavaCompletionProvider.java:1172)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.resolveCompletion(JavaCompletionProvider.java:608)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.run(JavaCompletionProvider.java:398)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery$Task.run(JavaCompletionProvider.java:4951)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:635)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:154)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:138)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:210)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:207)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:168)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:356)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:71)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:207)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runWhenScanFinished(TaskProcessor.java:245)
   at org.netbeans.modules.parsing.api.ParserManager.parseWhenScanFinished(ParserManager.java:131)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.query(JavaCompletionProvider.java:290)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)