Note the branch for bug #505845 allows this information to flow from dupes to master; see new properties Bug.users_affected_with_dupes, Bug.users_affected_count_with_dupes, Bug.users_unaffected.
Note the branch for bug #505845 allows this information to flow from dupes to master; see new properties Bug.users_ affected_ with_dupes, Bug.users_ affected_ count_with_ dupes, Bug.users_ unaffected.