java.lang.NullPointerException
   at org.netbeans.modules.cnd.modelimpl.impl.services.UsingResolverImpl.findVisibleNamespaces(UsingResolverImpl.java:231)
   at org.netbeans.modules.cnd.modelimpl.impl.services.UsingResolverImpl.findVisibleNamespacesBfs(UsingResolverImpl.java:128)
   at org.netbeans.modules.cnd.modelimpl.impl.services.UsingResolverImpl.findVisibleNamespaces(UsingResolverImpl.java:120)
   at org.netbeans.modules.cnd.completion.csm.CompletionResolverImpl.getNamespacesToSearch(CompletionResolverImpl.java:1813)
   at org.netbeans.modules.cnd.completion.csm.CompletionResolverImpl.getClassesEnums(CompletionResolverImpl.java:909)
   at org.netbeans.modules.cnd.completion.csm.CompletionResolverImpl.resolveContext(CompletionResolverImpl.java:489)
   at org.netbeans.modules.cnd.completion.csm.CompletionResolverImpl.resolveContext(CompletionResolverImpl.java:254)
   at org.netbeans.modules.cnd.completion.csm.CompletionResolverImpl.resolve(CompletionResolverImpl.java:204)
   at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery$Context.resolve(CsmCompletionQuery.java:900)
   at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery$Context.resolveItem(CsmCompletionQuery.java:1341)
   at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery$Context.resolveExp(CsmCompletionQuery.java:1266)
   at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery.getResult(CsmCompletionQuery.java:350)
   at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery.query(CsmCompletionQuery.java:331)
   at org.netbeans.modules.cnd.completion.csm.CompletionUtilities.findItemsReferencedAtCaretPos(CompletionUtilities.java:154)
   at org.netbeans.modules.cnd.completion.impl.xref.ReferencesSupport.findDeclaration(ReferencesSupport.java:388)
   at org.netbeans.modules.cnd.completion.impl.xref.ReferencesSupport.findDeclaration(ReferencesSupport.java:339)
   at org.netbeans.modules.cnd.completion.impl.xref.ReferencesSupport.findReferencedObject(ReferencesSupport.java:232)
   at org.netbeans.modules.cnd.completion.impl.xref.ReferenceImpl.getReferencedObject(ReferenceImpl.java:103)
   at org.netbeans.modules.cnd.highlight.semantic.MarkOccurrencesHighlighter.getOccurrences(MarkOccurrencesHighlighter.java:268)
   at org.netbeans.modules.cnd.highlight.semantic.MarkOccurrencesHighlighter.runImpl(MarkOccurrencesHighlighter.java:209)
   at org.netbeans.modules.cnd.highlight.semantic.MarkOccurrencesHighlighter.run(MarkOccurrencesHighlighter.java:148)
   at org.netbeans.modules.cnd.model.tasks.CsmFileTaskFactory$5.run(CsmFileTaskFactory.java:474)
   at org.netbeans.modules.cnd.model.tasks.CsmFileTaskFactory$CsmSafeRunnable.run(CsmFileTaskFactory.java:491)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)