资产中的Sass语法错误：在vendor文件夹中使用.css文件进行预编译

Question

我使用rails 4.1.7并在application.css.scss中包含一个custom css模板，并将custome css文件（ace.css）放在vender/assets/stylesheets文件夹中。

application.css.scss：

/*
 *= require bootstrap
 *= require font-awesome
 *= require ace-fonts
 *= require ace  <----
 *= require_self
 *= require attr_filter
 */

我运行RAILS_ENV=production bundle exec rake assets:precompile它显示错误：

rake aborted!
Sass::SyntaxError: Invalid CSS after "...th: 991px) and ": expected media expression (e.g. (min-device-width: 800px)), was "only screen and..."
  (in /Users/xushanchuan/projects/newmerger/app/assets/stylesheets/application.css.scss)
(sass):11576
Tasks: TOP => assets:precompile
(See full trace by running task with --trace)

但是当我删除ace.css文件时，资产：预编译工作。为什么css文件会生成Sass::SyntaxError？

Answer 1

目前，解决此问题的唯一方法是删除所谓的错误语法：＆＃39; only screen and＆＃39;。