gitlab 使用container registry的时候，我删除了一个tag后，再查看这个tag 列表的时候提示 Something went wrong while fetching the repository list.
查看log日志出现一个异常
{"severity":"ERROR","time":"2021-07-15T07:30:13.242Z","correlation_id":"01FAMH5CX0WZ5X105YB1FBEXCK","exception.class":"NoMethodError","exception.message":"undefined method `map' for nil:NilClass","exception.backtrace":["lib/container_registry/tag.rb:91:in `block in layers'","lib/gitlab/utils/strong_memoize.rb:30:in `strong_memoize'","lib/container_registry/tag.rb:88:in `layers'","lib/container_registry/tag.rb:103:in `total_size'","lib/gitlab/graphql/present/field_extension.rb:18:in `resolve'","lib/gitlab/graphql/generic_tracing.rb:40:in `with_labkit_tracing'","lib/gitlab/graphql/generic_tracing.rb:30:in `platform_trace'","lib/gitlab/graphql/generic_tracing.rb:40:in `with_labkit_tracing'","lib/gitlab/graphql/generic_tracing.rb:30:in `platform_trace'","app/graphql/gitlab_schema.rb:43:in `multiplex'","app/controllers/graphql_controller.rb:110:in `execute_multiplex'","app/controllers/graphql_controller.rb:41:in `execute'","app/controllers/application_controller.rb:487:in `set_current_admin'","lib/gitlab/session.rb:11:in `with_session'","app/controllers/application_controller.rb:478:in `set_session_storage'","lib/gitlab/i18n.rb:99:in `with_locale'","lib/gitlab/i18n.rb:105:in `with_user_locale'","app/controllers/application_controller.rb:472:in `set_locale'","app/controllers/application_controller.rb:466: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/web_transaction.rb:21:in `run'","lib/gitlab/metrics/rack_middleware.rb:16:in `call'","lib/gitlab/middleware/speedscope.rb:13: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/middleware/rack_multipart_tempfile_factory.rb:19:in `call'","lib/gitlab/metrics/requests_rack_middleware.rb:74:in `call'","lib/gitlab/middleware/release_env.rb:12:in `call'"],"user.username":"root","tags.program":"web","tags.locale":"en","tags.feature_category":"not_owned","tags.correlation_id":"01FAMH5CX0WZ5X105YB1FBEXCK"}
有没有人遇到过？
