TypeError (singleton can’t be dumped): lib/gitlab/tree_summary.rb:109:in `fetch_last_cached_commits_list’ lib/gitlab/tree_summary.rb:91:in `fill_last_commits!’ lib/gitlab/tree_summary.rb:43:in `block in summarize’ lib/gitlab/tree_summary.rb:43:in `tap’ lib/gitlab/tree_summary.rb:43:in `summarize’ lib/gitlab/tree_summary.rb:49:in `fetch_logs’ app/controllers/projects/refs_controller.rb:52:in `block (2 levels) in logs_tree’ app/controllers/projects/refs_controller.rb:49:in `logs_tree’ app/controllers/application_controller.rb:537:in `block in allow_gitaly_ref_name_caching’ lib/gitlab/gitaly_client.rb:343:in `allow_ref_name_caching’ app/controllers/application_controller.rb:536:in `allow_gitaly_ref_name_caching’ app/controllers/application_controller.rb:482:in `set_current_admin’ lib/gitlab/session.rb:11:in `with_session’ app/controllers/application_controller.rb:473:in `set_session_storage’ lib/gitlab/i18n.rb:73:in `with_locale’ lib/gitlab/i18n.rb:79:in `with_user_locale’ app/controllers/application_controller.rb:467:in `set_locale’ lib/gitlab/error_tracking.rb:52:in `with_context’ app/controllers/application_controller.rb:532:in `sentry_context’ app/controllers/application_controller.rb:460:in `block in set_current_context’ lib/gitlab/application_context.rb:56:in `block in use’ lib/gitlab/application_context.rb:56:in `use’ lib/gitlab/application_context.rb:22:in `with_context’ app/controllers/application_controller.rb:451:in `set_current_context’ lib/gitlab/metrics/elasticsearch_rack_middleware.rb:16:in `call’ lib/gitlab/middleware/rails_queue_duration.rb:33:in `call’ lib/gitlab/metrics/rack_middleware.rb:16:in `block in call’ lib/gitlab/metrics/transaction.rb:56:in `run’ lib/gitlab/metrics/rack_middleware.rb:16:in `call’ lib/gitlab/request_profiler/middleware.rb:17:in `call’ lib/gitlab/jira/middleware.rb:19:in `call’ lib/gitlab/middleware/go.rb:20:in `call’ lib/gitlab/etag_caching/middleware.rb:21:in `call’ lib/gitlab/middleware/multipart.rb:172:in `call’ lib/gitlab/middleware/read_only/controller.rb:50:in `call’ lib/gitlab/middleware/read_only.rb:18:in `call’ lib/gitlab/middleware/same_site_cookies.rb:27:in `call’ lib/gitlab/middleware/handle_malformed_strings.rb:21:in `call’ lib/gitlab/middleware/basic_health_check.rb:25:in `call’ lib/gitlab/middleware/handle_ip_spoof_attack_error.rb:25:in `call’ lib/gitlab/middleware/request_context.rb:21:in `call’ config/initializers/fix_local_cache_middleware.rb:11:in `call’ lib/gitlab/metrics/requests_rack_middleware.rb:76:in `call’ lib/gitlab/middleware/release_env.rb:12:in `call’