java.lang.AssertionError: Wrong diagnostic handler: com.sun.tools.javac.util.Log$DeferredDiagnosticHandler@61b04025
Thread dump:
Deadlock Detector
	java.lang.Thread.sleep(Native Method)
	org.netbeans.modules.deadlock.detector.Detector.run(Detector.java:138)
	java.lang.Thread.run(Thread.java:748)
Inactive RequestProcessor thread [Was:org.netbeans.modules.parsing.spi.Scheduler/org.netbeans.modules.parsing.spi.Scheduler$1]
	java.lang.Object.wait(Native Method)
	org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2002)
Java2D Disposer
	java.lang.Object.wait(Native Method)
	java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
	java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
	sun.java2d.Disposer.run(Disposer.java:148)
	java.lang.Thread.run(Thread.java:748)
Attach Listener
Inactive RequestProcessor thread [Was:org.netbeans.modules.java.editor.overridden.AnnotationsHolder/org.openide.util.RequestProcessor$RPFutureTask]
	java.lang.Object.wait(Native Method)
	org.openide.util.Requ
   at com.sun.tools.javac.util.Assert.error(Assert.java:162)
   at com.sun.tools.javac.util.Assert.check(Assert.java:87)
   at com.sun.tools.javac.util.Log.popDiagnosticHandler(Log.java:526)
   at com.sun.tools.javac.api.JavacTrees.attributeDocReference(JavacTrees.java:556)
   at com.sun.tools.javac.api.JavacTrees.ensureDocReferenceAttributed(JavacTrees.java:454)
   at org.netbeans.api.java.source.TreeUtilities.getReferenceClass(TreeUtilities.java:1685)
   at org.netbeans.modules.java.editor.base.javadoc.JavadocImports.referenceEmbeddedSourceNodes(JavadocImports.java:604)
   at org.netbeans.modules.java.editor.base.javadoc.JavadocImports.access$100(JavadocImports.java:87)
   at org.netbeans.modules.java.editor.base.javadoc.JavadocImports$1.visitReference(JavadocImports.java:139)
   at org.netbeans.modules.java.editor.base.javadoc.JavadocImports$1.visitReference(JavadocImports.java:122)
   at com.sun.tools.javac.tree.DCTree$DCReference.accept(DCTree.java:636)
   at com.sun.source.util.DocTreePathScanner.scan(DocTreePathScanner.java:71)
   at com.sun.source.util.DocTreeScanner.visitLink(DocTreeScanner.java:296)
   at com.sun.tools.javac.tree.DCTree$DCLink.accept(DCTree.java:503)
   at com.sun.source.util.DocTreePathScanner.scan(DocTreePathScanner.java:71)
   at com.sun.source.util.DocTreeScanner.scanAndReduce(DocTreeScanner.java:83)
   at com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:98)
   at com.sun.source.util.DocTreeScanner.scanAndReduce(DocTreeScanner.java:106)
   at com.sun.source.util.DocTreeScanner.visitDocComment(DocTreeScanner.java:184)
   at com.sun.tools.javac.tree.DCTree$DCDocComment.accept(DCTree.java:135)
   at com.sun.source.util.DocTreePathScanner.scan(DocTreePathScanner.java:50)
   at org.netbeans.modules.java.editor.base.javadoc.JavadocImports.computeReferencedElements(JavadocImports.java:145)
   at org.netbeans.modules.java.editor.base.imports.UnusedImports$DetectorVisitor.handleJavadoc(UnusedImports.java:151)
   at org.netbeans.modules.java.editor.base.imports.UnusedImports$DetectorVisitor.visitClass(UnusedImports.java:164)
   at org.netbeans.modules.java.editor.base.imports.UnusedImports$DetectorVisitor.visitClass(UnusedImports.java:130)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:812)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:94)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:105)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:103)
   at org.netbeans.modules.java.editor.base.imports.UnusedImports$DetectorVisitor.visitCompilationUnit(UnusedImports.java:191)
   at org.netbeans.modules.java.editor.base.imports.UnusedImports$DetectorVisitor.visitCompilationUnit(UnusedImports.java:130)
   at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:593)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:94)
   at org.netbeans.modules.java.editor.base.imports.UnusedImports.process(UnusedImports.java:108)
   at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase.process(SemanticHighlighterBase.java:305)
   at org.netbeans.modules.java.editor.semantic.SemanticHighlighter.process(SemanticHighlighter.java:76)
   at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase.run(SemanticHighlighterBase.java:162)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:584)
   at org.netbeans.modules.parsing.impl.TaskProcessor$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$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at org.openide.util.RequestProcessor$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)