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Opening `/dashboard/todos` on Omnibus install gives 500 error

Summary

Opening /dashboard/todos on Omnibus install gives 500 error.

ActionView::Template::Error (undefined method `name' for nil:NilClass):
    12:             ·
    13:
    14:         %span
    15:           = todo_parent_path(todo)
    16:
    17:         %span.todo-label
    18:           - if todo.target

Steps to reproduce

Open the todo list from the UI or navigate to /dashboard/todos. This is only a problem on some accounts.

What is the current bug behavior?

I see a Gitlab 500 error in a web browser.

What is the expected correct behavior?

Seeing my todo list.

Relevant logs and/or screenshots

Screenshot 500_error
Logs 
==> /var/log/gitlab/gitlab-rails/production.log <==
Started GET "/dashboard/todos" for xxx.xxx.xxx.xxx at 2023-01-13 16:15:09 -0600
Processing by Dashboard::TodosController#index as HTML
Rendered layout layouts/dashboard.html.haml (Duration: 14.0ms | Allocations: 5765)
Completed 500 Internal Server Error in 88ms (ActiveRecord: 11.1ms | Elasticsearch: 0.0ms | Allocations: 22448)


==> /var/log/gitlab/gitlab-rails/production_json.log <==
{"method":"GET","path":"/dashboard/todos","format":"html","controller":"Dashboard::TodosController","action":"index","status":500,"time":"2023-01-13T22:15:09.755Z","params":[],"correlation_id":"ID","meta.caller_id":"Dashboard::TodosController#index","meta.remote_ip":"xxx.xxx.xxx.xxx","meta.feature_category":"team_planning","meta.user":"USERNAME","meta.user_id":2,"meta.client_id":"user/2","remote_ip":"xxx.xxx.xxx.xxx","user_id":2,"username":"USERNAME","ua":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0","queue_duration_s":0.006174,"request_urgency":"low","target_duration_s":5,"redis_calls":17,"redis_allowed_cross_slot_calls":1,"redis_duration_s":0.005679,"redis_read_bytes":2647,"redis_write_bytes":2378,"redis_cache_calls":12,"redis_cache_duration_s":0.004221,"redis_cache_read_bytes":2218,"redis_cache_write_bytes":635,"redis_sessions_calls":4,"redis_sessions_allowed_cross_slot_calls":1,"redis_sessions_duration_s":0.001282,"redis_sessions_read_bytes":429,"redis_sessions_write_bytes":1690,"redis_shared_state_calls":1,"redis_shared_state_duration_s":0.000176,"redis_shared_state_write_bytes":53,"db_count":25,"db_write_count":0,"db_cached_count":7,"db_replica_count":0,"db_primary_count":25,"db_main_count":25,"db_main_replica_count":0,"db_replica_cached_count":0,"db_primary_cached_count":7,"db_main_cached_count":7,"db_main_replica_cached_count":0,"db_replica_wal_count":0,"db_primary_wal_count":0,"db_main_wal_count":0,"db_main_replica_wal_count":0,"db_replica_wal_cached_count":0,"db_primary_wal_cached_count":0,"db_main_wal_cached_count":0,"db_main_replica_wal_cached_count":0,"db_replica_duration_s":0.0,"db_primary_duration_s":0.013,"db_main_duration_s":0.013,"db_main_replica_duration_s":0.0,"cpu_s":0.091907,"mem_objects":30734,"mem_bytes":2652804,"mem_mallocs":6641,"mem_total_bytes":3882164,"pid":1498,"worker_id":"puma_0","rate_limiting_gates":[],"exception.class":"ActionView::Template::Error","exception.message":"undefined method name' for nil:NilClass","exception.backtrace":["app/helpers/todos_helper.rb:62:in todo_parent_path'","app/views/dashboard/todos/_todo.html.haml:15","app/views/dashboard/todos/index.html.haml:82","app/controllers/application_controller.rb:142:in render'","app/controllers/application_controller.rb:533:in set_current_admin'","lib/gitlab/session.rb:11:in with_session'","app/controllers/application_controller.rb:524:in set_session_storage'","lib/gitlab/i18n.rb:107:in with_locale'","lib/gitlab/i18n.rb:113:in with_user_locale'","app/controllers/application_controller.rb:512:in set_locale'","app/controllers/application_controller.rb:506:in set_current_context'","lib/gitlab/metrics/elasticsearch_rack_middleware.rb:16:in call'","lib/gitlab/middleware/memory_report.rb:13:in call'","lib/gitlab/middleware/speedscope.rb:13:in call'","lib/gitlab/database/load_balancing/rack_middleware.rb:23: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:46:in run'","lib/gitlab/metrics/rack_middleware.rb:16: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/query_analyzer.rb:11:in block in call'","lib/gitlab/database/query_analyzer.rb:37:in within'","lib/gitlab/middleware/query_analyzer.rb:11:in call'","lib/gitlab/middleware/multipart.rb:173: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'","lib/gitlab/middleware/webhook_recursion_detection.rb:15:in call'","config/initializers/fix_local_cache_middleware.rb:11:in call'","lib/gitlab/middleware/compressed_json.rb:37:in call'","lib/gitlab/middleware/rack_multipart_tempfile_factory.rb:19:in call'","lib/gitlab/middleware/sidekiq_web_static.rb:20:in call'","lib/gitlab/metrics/requests_rack_middleware.rb:77:in call'","lib/gitlab/middleware/release_env.rb:13:in `call'"],"db_duration_s":0.0111,"view_duration_s":0.0,"duration_s":0.08807}


==> /var/log/gitlab/gitlab-rails/production.log <==


ActionView::Template::Error (undefined method `name' for nil:NilClass):
12:             ·
13:
14:         %span
15:           = todo_parent_path(todo)
16:
17:         %span.todo-label
18:           - if todo.target


app/helpers/todos_helper.rb:62:in todo_parent_path' app/views/dashboard/todos/_todo.html.haml:15 app/views/dashboard/todos/index.html.haml:82 app/controllers/application_controller.rb:142:in render'
app/controllers/application_controller.rb:533:in set_current_admin' lib/gitlab/session.rb:11:in with_session'
app/controllers/application_controller.rb:524:in set_session_storage' lib/gitlab/i18n.rb:107:in with_locale'
lib/gitlab/i18n.rb:113:in with_user_locale' app/controllers/application_controller.rb:512:in set_locale'
app/controllers/application_controller.rb:506:in set_current_context' lib/gitlab/metrics/elasticsearch_rack_middleware.rb:16:in call'
lib/gitlab/middleware/memory_report.rb:13:in call' lib/gitlab/middleware/speedscope.rb:13:in call'
lib/gitlab/database/load_balancing/rack_middleware.rb:23: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:46:in run'
lib/gitlab/metrics/rack_middleware.rb:16: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/query_analyzer.rb:11:in block in call' lib/gitlab/database/query_analyzer.rb:37:in within'
lib/gitlab/middleware/query_analyzer.rb:11:in call' lib/gitlab/middleware/multipart.rb:173: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' lib/gitlab/middleware/webhook_recursion_detection.rb:15:in call'
config/initializers/fix_local_cache_middleware.rb:11:in call' lib/gitlab/middleware/compressed_json.rb:37:in call'
lib/gitlab/middleware/rack_multipart_tempfile_factory.rb:19:in call' lib/gitlab/middleware/sidekiq_web_static.rb:20:in call'
lib/gitlab/metrics/requests_rack_middleware.rb:77:in call' lib/gitlab/middleware/release_env.rb:13:in call'

Output of checks

Results of GitLab application Check

Expand for output related to the GitLab application check 
(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:check SANITIZE=true)


Checking GitLab subtasks ...


Checking GitLab Shell ...


GitLab Shell: ... GitLab Shell version >= 14.14.0 ? ... OK (14.14.0)
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Internal API available: OK
Redis available via internal API: OK
gitlab-shell self-check successful


Checking GitLab Shell ... Finished


Checking Gitaly ...


Gitaly: ... default ... OK


Checking Gitaly ... Finished


Checking Sidekiq ...


Sidekiq: ... Running? ... yes
Number of Sidekiq processes (cluster/worker) ... 1/1


Checking Sidekiq ... Finished


Checking Incoming Email ...


Incoming Email: ... Checking Reply by email ...


IMAP server credentials are correct? ... Checking incoming
yes
Mailroom enabled? ... skipped
MailRoom running? ... skipped


Checking Reply by email ... Finished


Checking Incoming Email ... Finished


Checking LDAP ...


LDAP: ... LDAP is disabled in config/gitlab.yml


Checking LDAP ... Finished


Checking GitLab App ...


Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Cable config exists? ... yes
Resque config exists? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... yes
Systemd unit files or init script exist? ... skipped (omnibus-gitlab has neither init script nor systemd units)
Systemd unit files or init script up-to-date? ... skipped (omnibus-gitlab has neither init script nor systemd units)
Projects have namespace: ...
3/1 ... yes
3/2 ... yes
3/3 ... yes
lots of yeses skipped
3/998 ... yes
2/999 ... yes
3/1000 ... yes
3/1001 ... yes
3/1002 ... yes
3/1003 ... yes
3/1004 ... yes
3/1005 ... yes
3/1006 ... yes
3/1007 ... yes
38/1008 ... yes
3/1009 ... yes
3/1010 ... yes
2/1011 ... yes
3/1012 ... yes
118/1013 ... yes
3/1014 ... yes
3/1015 ... yes
2/1016 ... yes
3/1017 ... yes
3/1018 ... yes
3/1019 ... yes
3/1020 ... yes
3/1021 ... yes
3/1022 ... yes
3/1023 ... yes
3/1024 ... yes
2/1025 ... yes
3/1026 ... yes
Redis version >= 6.0.0? ... yes
Ruby version >= 2.7.2 ? ... yes (2.7.7)
Git user has default SSH configuration? ... yes
Active users: ... 83
Is authorized keys file accessible? ... yes
GitLab configured to store new projects in hashed storage? ... yes
All projects are in hashed storage? ... yes


Checking GitLab App ... Finished


Checking GitLab subtasks ... Finished

Possible fixes

I don't know of any fixes or workarounds. Maybe I could delete all my todos from the database if I knew the correct command.