java.lang.NullPointerException
   at com.sun.org.apache.xerces.internal.dom.DeepNodeListImpl.nextMatchingElementAfter(DeepNodeListImpl.java:200)
   at com.sun.org.apache.xerces.internal.dom.DeepNodeListImpl.item(DeepNodeListImpl.java:146)
   at com.sun.org.apache.xerces.internal.dom.DeepNodeListImpl.getLength(DeepNodeListImpl.java:117)
   at org.netbeans.modules.editor.tools.storage.api.XMLHintPreferences$HintPreferencesProviderImpl.getPreferences(XMLHintPreferences.java:279)
   at org.netbeans.modules.editor.tools.storage.api.ToolPreferences.getPreferences(ToolPreferences.java:79)
   at org.netbeans.modules.apisupport.hints.projectbridge.ProjectConfiguration$ProjectSettingsProvider$1.getProjectSettings(ProjectConfiguration.java:107)
   at org.netbeans.modules.editor.hints.projects.settings.FileHintPreferencesProviderImpl.getFilePreferences(FileHintPreferencesProviderImpl.java:69)
   at org.netbeans.spi.editor.hints.settings.FileHintPreferences.getFilePreferences(FileHintPreferences.java:70)
   at org.netbeans.modules.java.hints.spiimpl.options.HintsSettings.getSettingsFor(HintsSettings.java:131)
   at org.netbeans.modules.java.hints.StandardJavacWarnings$CompilerSettingsImpl.buildCommandLine(StandardJavacWarnings.java:210)
   at org.netbeans.modules.java.source.tasklist.CompilerSettings.getCommandLine(CompilerSettings.java:70)
   at org.netbeans.modules.java.source.parsing.JavacParser.createJavacTask(JavacParser.java:774)
   at org.netbeans.modules.java.source.parsing.JavacParser.createJavacTask(JavacParser.java:736)
   at org.netbeans.modules.java.source.parsing.CompilationInfoImpl.getJavacTask(CompilationInfoImpl.java:401)
   at org.netbeans.modules.java.source.parsing.JavacParser.getResult(JavacParser.java:514)
   at org.netbeans.modules.java.source.parsing.JavacParser.getResult(JavacParser.java:174)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callGetResult(TaskProcessor.java:620)
   at org.netbeans.modules.parsing.impl.SourceCache.getResult(SourceCache.java:256)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:733)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)