500 error on viewing todos

Summary

500 error on viewing my todos on GitLab.com

More details here:

Looks like one of my todos has a nil project

https://sentry.gitlap.com/gitlab/gitlabcom/issues/4140/

Relevant logs and/or screenshots

ActionView::Template::Error

undefined method `name_with_namespace' for nil:NilClass
app/views/dashboard/todos/index.html.haml in block in _app_views_dashboard_todos_index_html_haml__805888156502021069_70055987718240 at line 53