S Haster Thanks for the report. But even if we modify the BeanIdentifierIndex#checkIsBuilt() your application would still fail. So I'm wondering if we shouldn't change more. Does your test app use a @Startup EJB singleton? It would be great if you could tell us a little bit more about your setup.

Also bean identifier index is just an optimization which could be disabled: http://docs.jboss.org/weld/reference/latest-master/en-US/html/configure.html#_bean_identifier_index_optimization.