404 error when viewing */tags page

Created by: detecti1

after updating to gitlab 6.0-stable, I got this error when viewing tags page on any project.

logs below

Started GET "/namespace/myproject/tags" for 127.0.0.1 at 2013-08-29 09:06:50 +0800
Processing by Projects::TagsController#index as HTML
  Parameters: {"project_id"=>"namespace/myproject"}
  Rendered shared/_ref_switcher.html.haml (3.7ms)
  Rendered projects/commits/_head.html.haml (8.4ms)
  Rendered projects/tags/index.html.haml within layouts/projects (42.5ms)
Completed 500 Internal Server Error in 117ms

ActionController::RoutingError (No route matches {:action=>"destroy", :controller=>"projects/tags", :project_id=>#<Project id: 1, name: "myproject", path: "myproject", description: "", created_at: "2013-07-03 02:32:40", updated_at: "2013-07-03 02:57:39", creator_id: 2, default_branch: "Development", issues_enabled: true, wall_enabled: false, merge_requests_enabled: true, wiki_enabled: true, namespace_id: 3, public: false, issues_tracker: "gitlab", issues_tracker_id: nil, snippets_enabled: false, last_activity_at: "2013-08-27 02:29:39", imported: false, import_url: nil>, :id=>"Ready_To_Upload_#4"}):
  app/views/projects/tags/index.html.haml:40:in `block in _app_views_projects_tags_index_html_haml__3465136261130741465_61452080'
  app/views/projects/tags/index.html.haml:15:in `each'
  app/views/projects/tags/index.html.haml:15:in `_app_views_projects_tags_index_html_haml__3465136261130741465_61452080'