Heroku rake资产：预编译无法编译Rails应用程序

我没有对资产进行任何更改，现在突然执行git push heroku master时，它在rake资产上中止了：precompile

...

Preparing app for Rails asset pipeline
Running: rake assets:precompile
I, [2014-03-14T18:30:05.776041 #675]  INFO -- : Writing /tmp/build_f664cf41-71b7-435d-b85e-8f607080a4d3/public/assets/application-0a41bdbc9b8fc13f1e62a69634eb2c98.js
rake aborted!
wrong number of arguments (2 for 1)
(in /tmp/build_f664cf41-71b7-435d-b85e-8f607080a4d3/app/assets/stylesheets/application.css.scss)
/tmp/build_f664cf41-71b7-435d-b85e-8f607080a4d3/vendor/bundle/ruby/2.0.0/gems/sass-3.2.14/lib/sass/importers/filesystem.rb:16:in `initialize'
/tmp/build_f664cf41-71b7-435d-b85e-8f607080a4d3/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.0/lib/sprockets/sass_importer.rb:11:in `initialize'

...

Tasks: TOP => assets:precompile
(See full trace by running task with --trace)
!
!     Precompiling assets failed.
!

!     Push rejected, failed to compile Ruby app

看起来资产/样式表/application.css.scss中的参数数目错误（2为1）正在中断。但是我的样式表中没有任何方法。这是该文件：

/*
* This is a manifest file that'll be compiled into application.css, which will include all the files
* listed below.
*
* Any CSS and SCSS file within this directory, lib/assets/stylesheets, vendor/assets/stylesheets,
* or vendor/assets/stylesheets of plugins, if any, can be referenced here using a relative path.
*
* You're free to add application-wide styles to this file and they'll appear at the top of the
* compiled file, but it's generally better to create a new file per style scope.
*
*= require_self
*= require_tree .
*/

在我的assets / stylesheets / custom.css.scss中，我的顶部是这样的：

@import 'bootstrap';
@import 'bootstrap-responsive';

在我的config / application.rb文件中，我有：

config.assets.precompile += %w(*.png *.jpg *.jpeg *.gif)
config.assets.initialize_on_precompile = false

我执行了一个heroku运行rake asset：clobber的操作，但没有帮助。

在本地，我的应用程序可以正常工作并正常运行。

这是我用来参考的一些宝石：

gem 'sass-rails'
gem 'bootstrap-sass', '2.3.2.0'
gem 'rails_12factor'
gem 'compass_rails'
gem 'jquery-rails'
gem 'rails', '4.0.2'

有任何想法吗？