SystemStackError: stack level too deep

https://sentry.gitlab.net/gitlab/gitlabcom/issues/1137742/

SystemStackError: stack level too deep
  banzai/reference_parser/base_parser.rb:180:in `collection_objects_for_ids'
    cache.values_at(*ids).compact
  banzai/reference_parser/user_parser.rb:94:in `find_users'
    collection_objects_for_ids(User, ids)
  banzai/reference_parser/user_parser.rb:23:in `referenced_by'
    find_users_for_groups(group_ids) | find_users(user_ids) |
  banzai/reference_parser/base_parser.rb:209:in `gather_references'
    referenced_by(nodes)
  banzai/reference_parser/base_parser.rb:201:in `process'
    gather_references(nodes)
...
(181 additional frame(s) were not displayed)

SystemStackError: stack level too deep