java.lang.Exception: no language for org.netbeans.modules.editor.NbEditorDocument@4c7a74e2, mimeType='text/plain', kitClass=null, length=379876, version=1, file=org.openide.loaders.DefaultDataObject@6dbd3a22[akrasny@akrasny-dt:/home/akrasny/work/src/zing/openjdk/dev/hotspot/src/cpu/x86/vm/x86_64.ad [valid]]
@[slowDocumentPropertiesSetup]
   at org.netbeans.modules.cnd.utils.CndUtils.severe(CndUtils.java:210)
   at org.netbeans.modules.cnd.utils.CndUtils.assertUnconditional(CndUtils.java:145)
   at org.netbeans.modules.cnd.source.CppEditorSupport.setupSlowDocumentProperties(CppEditorSupport.java:269)
   at org.netbeans.modules.cnd.source.CppEditorSupport.access$200(CppEditorSupport.java:106)
   at org.netbeans.modules.cnd.source.CppEditorSupport$3.run(CppEditorSupport.java:399)
   at org.openide.util.RequestProcessor$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)