java.lang.NullPointerException
   at com.sun.tools.javac.main.JavaCompiler.resolveIdent(JavaCompiler.java:765)
   at com.sun.tools.javac.main.JavaCompiler.resolveIdent(JavaCompiler.java:740)
   at com.sun.tools.javac.model.JavacElements.binaryNameToClassSymbol(JavacElements.java:132)
   at com.sun.tools.javac.model.JavacElements.getTypeElementByBinaryName(JavacElements.java:123)
   at org.netbeans.api.java.source.CompilationInfo.getTopLevelElements(CompilationInfo.java:243)
   at org.netbeans.modules.java.navigation.ElementScanningTask.runImpl(ElementScanningTask.java:131)
   at org.netbeans.modules.java.navigation.ElementScanningTask.run(ElementScanningTask.java:105)
   at org.netbeans.modules.java.navigation.ElementScanningTask.run(ElementScanningTask.java:86)
   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)