500内部服务器错误--Rails生产第二次传递中的ActionView :: Template ::错误

Question

喜欢上一个问题：  500 Internal Server Error - ActionView::Template::Error in Rails Production

我通过网页（内部500）浏览git树时遇到同样的错误，但那里的答案说我应该运行

 bundle exec rake assets:precompile

并提到我  http://guides.rubyonrails.org/asset_pipeline.html#in-production

我在Ubuntu 14.04 LTS上运行GitLab 7.6.1 0286222完全是最新的。这使我可以从本地git机器推送和拉动，并通过Web服务环顾四周。我运行了修改后的资产：预编译，如下所示，但问题仍在继续。

至于我的具体错误。在生产日志中，我得到：

git@git01:~/gitlab/log$ tail -n 20 production.log
Started GET "/chef/cheftest/tree/master/cookbooks" for 127.0.0.1 at 2014-12-24 16:03:25 -0500
Processing by Projects::TreeController#show as HTML
  Parameters: {"project_id"=>"chef/cheftest", "id"=>"master/cookbooks"}
Completed 500 Internal Server Error in 490ms

ActionView::Template::Error (undefined method `[]' for nil:NilClass):
    1: - tree, commit = submodule_links(submodule_item)
    2: %tr{ class: "tree-item" }
    3:   %td.tree-item-file-name
    4:     %i.fa.fa-archive
  app/models/repository.rb:162:in `method_missing'
  app/models/repository.rb:228:in `submodule_url_for'
  app/helpers/submodule_helper.rb:6:in `submodule_links'
  app/views/projects/tree/_submodule_item.html.haml:1:in `_app_views_projects_tree__submodule_item_html_haml___742655240099390426_69818877669240'
  app/helpers/tree_helper.rb:19:in `render_tree'
  app/views/projects/tree/_tree.html.haml:42:in `_app_views_projects_tree__tree_html_haml__47884322835133800_69818822684460'
  app/views/projects/tree/show.html.haml:9:in `_app_views_projects_tree_show_html_haml__1575471590709486656_69818822138660'
  app/controllers/projects/tree_controller.rb:13:in `show'

我很乐意根据需要运行任何命令并编辑任何配置文件，但请告诉我文件的位置以及如何运行命令。感谢您的帮助。