ActionView::Template::Error: No route matches {:action=>"show", :controller=>"projects", :id=>"ID", :namespace_id=>...

https://sentry.gitlab.net/gitlab/gitlabcom/issues/538796/

ActionController::UrlGenerationError: No route matches {:action=>"show", :controller=>"projects", :id=>"ID", :namespace_id=>"NAMESPACE/../../dos1"} missing required keys: [:namespace_id]
  action_dispatch/journey/formatter.rb:46:in `generate'
    raise ActionController::UrlGenerationError, message
  action_dispatch/routing/route_set.rb:721:in `generate'
    @set.formatter.generate(named_route, options, recall, PARAMETERIZE)
  action_dispatch/routing/route_set.rb:752:in `generate'
    Generator.new(route_key, options, recall, self).generate
  action_dispatch/routing/route_set.rb:799:in `url_for'
    path, params = generate(route_name, path_options, recall)
  action_dispatch/routing/route_set.rb:280:in `call'
    t._routes.url_for(hash, route_name, url_strategy)
...
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ActionView::Template::Error: No route matches {:action=>"show", :controller=>"projects", :id=>"ID", :namespace_id=>"NAMESPACE"} missing required keys: [:namespace_id]

ActionView::Template::Error: No route matches {:action=>"show", :controller=>"projects", :id=>"ID", :namespace_id=>"NAMESPACE"} missing required keys: [:namespace_id]