java.lang.NullPointerException
   at org.netbeans.modules.java.editor.base.javadoc.JavadocImports.paramElementFor(JavadocImports.java:235)
   at org.netbeans.modules.java.editor.base.javadoc.JavadocImports.access$400(JavadocImports.java:87)
   at org.netbeans.modules.java.editor.base.javadoc.JavadocImports$2.visitParam(JavadocImports.java:220)
   at org.netbeans.modules.java.editor.base.javadoc.JavadocImports$2.visitParam(JavadocImports.java:167)
   at com.sun.tools.javac.tree.DCTree$DCParam.accept(DCTree.java:503)
   at com.sun.source.util.DocTreePathScanner.scan(DocTreePathScanner.java:71)
   at com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:99)
   at com.sun.source.util.DocTreeScanner.scanAndReduce(DocTreeScanner.java:107)
   at com.sun.source.util.DocTreeScanner.visitDocComment(DocTreeScanner.java:186)
   at com.sun.tools.javac.tree.DCTree$DCDocComment.accept(DCTree.java:135)
   at com.sun.source.util.DocTreePathScanner.scan(DocTreePathScanner.java:50)
   at org.netbeans.modules.java.editor.base.javadoc.JavadocImports.computeTokensOfReferencedElements(JavadocImports.java:229)
   at org.netbeans.modules.java.editor.base.semantic.FindLocalUsagesQuery.handleJavadoc(FindLocalUsagesQuery.java:118)
   at org.netbeans.modules.java.editor.base.semantic.FindLocalUsagesQuery.visitMethod(FindLocalUsagesQuery.java:139)
   at org.netbeans.modules.java.editor.base.semantic.FindLocalUsagesQuery.visitMethod(FindLocalUsagesQuery.java:80)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:874)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:72)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:94)
   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 org.netbeans.modules.java.editor.base.semantic.FindLocalUsagesQuery.visitClass(FindLocalUsagesQuery.java:166)
   at org.netbeans.modules.java.editor.base.semantic.FindLocalUsagesQuery.visitClass(FindLocalUsagesQuery.java:80)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:782)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:72)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:94)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:91)
   at com.sun.source.util.TreeScanner.visitNewClass(TreeScanner.java:527)
   at org.netbeans.modules.java.editor.base.semantic.FindLocalUsagesQuery.visitNewClass(FindLocalUsagesQuery.java:198)
   at org.netbeans.modules.java.editor.base.semantic.FindLocalUsagesQuery.visitNewClass(FindLocalUsagesQuery.java:80)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1681)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:72)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:94)
   at com.sun.source.util.TreeScanner.visitReturn(TreeScanner.java:470)
   at com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1524)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:72)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:94)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:106)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:103)
   at com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:249)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1002)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:72)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:94)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:91)
   at com.sun.source.util.TreeScanner.visitMethod(TreeScanner.java:207)
   at org.netbeans.modules.java.editor.base.semantic.FindLocalUsagesQuery.visitMethod(FindLocalUsagesQuery.java:140)
   at org.netbeans.modules.java.editor.base.semantic.FindLocalUsagesQuery.visitMethod(FindLocalUsagesQuery.java:80)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:874)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:72)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:94)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:91)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:106)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:103)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:114)
   at com.sun.source.util.TreeScanner.visitClass(TreeScanner.java:188)
   at org.netbeans.modules.java.editor.base.semantic.FindLocalUsagesQuery.visitClass(FindLocalUsagesQuery.java:166)
   at org.netbeans.modules.java.editor.base.semantic.FindLocalUsagesQuery.visitClass(FindLocalUsagesQuery.java:80)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:782)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:72)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:94)
   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$JCCompilationUnit.accept(JCTree.java:563)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:72)
   at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:94)
   at org.netbeans.modules.java.editor.base.semantic.FindLocalUsagesQuery.findUsages(FindLocalUsagesQuery.java:102)
   at org.netbeans.modules.java.editor.base.semantic.MarkOccurrencesHighlighterBase.processImpl(MarkOccurrencesHighlighterBase.java:357)
   at org.netbeans.modules.java.editor.semantic.MarkOccurrencesHighlighter.process(MarkOccurrencesHighlighter.java:116)
   at org.netbeans.modules.java.editor.base.semantic.MarkOccurrencesHighlighterBase.run(MarkOccurrencesHighlighterBase.java:121)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:584)
   at org.netbeans.modules.parsing.impl.TaskProcessor$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)