title: Push to Heroku - hanging Fetching http://github.com/gregbell/active_admin.git
body: <p>I don't know why push to heroku failed. I tried pushing it many times, but it didn't work.</p>
  
  <p>I use the following OS/tools:</p>
  
  <ul>
  <li>Windows 7 </li>
  <li>rails version 4.0.3,  </li>
  <li>ruby version 2</li>
  <li>Node.js</li>
  <li>Github </li>
  <li>Heroku</li>
  </ul>
  
  <p>Here is the error I got: </p>
  
  <pre><code>$ git push heroku master
  Initializing repository, done.
  Counting objects: 150, done.
  Delta compression using up to 4 threads.
  Compressing objects: 100% (139/139), done.
  Writing objects: 100% (150/150), 175.21 KiB | 190.00 KiB/s, done.
  Total 150 (delta 8), reused 0 (delta 0)
  
  Ruby app detected
  Compiling Ruby/Rails
  Using Ruby version: ruby-2.0.0
  Warning:
         Removing `Gemfile.lock` because it was generated on Windows.
         Bundler will do a full resolve so native gems are handled properly.
         This may result in unexpected gem versions being used in your app.
         In rare occasions Bundler may not be able to resolve your dependencies at
   all.
         https://devcenter.heroku.com/articles/bundler-windows-gemfile
         Installing dependencies using 1.5.2
         New app detected loading default bundler cache
         Running: bundle install --without development:test --path vendor/bundle -
  -binstubs vendor/bundle/bin -j4
         Fetching http://github.com/gregbell/active_admin.git
  
        Timed out compiling Ruby app (15 minutes)
        See https://devcenter.heroku.com/articles/slug-compiler#time-limit
  
        To git@heroku.com:warm-stream-5170.git
        [remote rejected] master -&gt; master (pre-receive hook declined)
        error: failed to push some refs to 'git@heroku.com:warm-stream-5170.git'
  </code></pre>
  
  <p>The gemfile is as follows:</p>
  
  <pre><code>      source 'https://rubygems.org'
        gem 'rails', '4.0.3'
        gem 'sqlite3'
        gem 'sass-rails', '~&gt; 4.0.0'
        gem 'uglifier', '&gt;= 1.3.0'
        gem 'coffee-rails', '~&gt; 4.0.0'
        gem 'jquery-rails'
        gem 'turbolinks'
        gem 'jbuilder', '~&gt; 1.2'
        group :doc do
        gem 'sdoc', require: false
        end
        gem 'activeadmin', github: 'gregbell/active_admin'
        gem 'activeadmin-axlsx'
        gem 'devise'
        gem 'cancan'
        gem 'rolify'
  </code></pre>