java.lang.NullPointerException
   at com.sun.tools.javac.comp.Analyzer$DiamondInitializer.process(Analyzer.java:245)
   at com.sun.tools.javac.comp.Analyzer$DiamondInitializer.process(Analyzer.java:211)
   at com.sun.tools.javac.comp.Analyzer.lambda$analyze$74(Analyzer.java:383)
   at java.util.HashMap$EntrySet.forEach(HashMap.java:1043)
   at com.sun.tools.javac.comp.Analyzer.analyze(Analyzer.java:381)
   at com.sun.tools.javac.comp.Analyzer.analyzeIfNeeded(Analyzer.java:353)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:706)
   at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:723)
   at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1205)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:990)
   at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:494)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:635)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:704)
   at com.sun.tools.javac.comp.Attr.attribStatToTree(Attr.java:412)
   at com.sun.tools.javac.api.JavacTrees.attribStatToTree(JavacTrees.java:975)
   at com.sun.tools.javac.api.JavacTrees.getAttrContext(JavacTrees.java:935)
   at com.sun.tools.javac.api.JavacTrees.getScope(JavacTrees.java:794)
   at com.sun.tools.javac.api.JavacTrees.getScope(JavacTrees.java:156)
   at org.netbeans.modules.java.editor.imports.ClipboardHandler$6.run(ClipboardHandler.java:266)
   at org.netbeans.modules.java.editor.imports.ClipboardHandler$6.run(ClipboardHandler.java:260)
   at org.netbeans.modules.java.editor.imports.ClipboardHandler$7$1.run(ClipboardHandler.java:338)
   at org.netbeans.modules.java.editor.imports.ClipboardHandler$7$1.run(ClipboardHandler.java:333)
   at org.netbeans.api.java.source.JavaSource$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.editor.imports.ClipboardHandler$7.run(ClipboardHandler.java:333)
   at org.openide.util.RequestProcessor$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$Processor.run(RequestProcessor.java:2058)
Caused: org.openide.util.RequestProcessor$FastItem: task failed due to: java.lang.NullPointerException