java.lang.ClassCastException: org.netbeans.modules.cnd.modelimpl.csm.FunctionImplEx cannot be cast to org.netbeans.modules.cnd.api.model.CsmFunctionDefinition
   at org.netbeans.modules.cnd.modelimpl.csm.FunctionImpl.findDefinition(FunctionImpl.java:678)
   at org.netbeans.modules.cnd.modelimpl.csm.FunctionImpl.getDefinition(FunctionImpl.java:488)
   at org.netbeans.modules.cnd.modelimpl.csm.FunctionImpl.getDefinition(FunctionImpl.java:455)
   at org.netbeans.modules.cnd.qnavigator.navigator.CsmFileFilter.isApplicable(CsmFileFilter.java:53)
   at org.netbeans.modules.cnd.qnavigator.navigator.CsmFileModel.buildPreModel(CsmFileModel.java:182)
   at org.netbeans.modules.cnd.qnavigator.navigator.NavigatorModel.update(NavigatorModel.java:175)
   at org.netbeans.modules.cnd.qnavigator.navigator.NavigatorNodeFactoryTask.run(NavigatorNodeFactoryTask.java:138)
   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:471)
   at java.util.concurrent.FutureTask.run(FutureTask.java:262)
   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)