title: bundle exec rake assets:precompile fails in Dev Environment
body: <p>Here is my <code>development.rb</code> file</p>
  
  <pre><code>config.assets.debug = false
  config.assets.compile = true
  config.assets.enabled = true
  config.assets.digest = true
  config.assets.raise_runtime_errors = true
  </code></pre>
  
  <p>and when I run the command <code>bundle exec rake assets:precompile --trace</code>, I get the following error.</p>
  
  <pre><code>Invoke assets:precompile (first_time)
  ** Invoke assets:environment (first_time)
  ** Execute assets:environment
  ** Invoke environment (first_time)
  ** Execute environment
  ** Execute assets:precompile
  rake aborted!
  ExecJS::ProgramError: TypeError: Object doesn't support this property or method
  c:/Ruby193/lib/ruby/gems/1.9.1/gems/execjs-
  </code></pre>