title: Rails 3.1.1 assets precompile - rake aborted
body: <p><strong>EDIT: Anybody else has any suggestions? I'm totally stumped!!!</strong></p>
  
  <p>I have an app in which all the assets compile just fine but in this second app, when I run:</p>
  
  <pre><code>RAILS_ENV=production rake assets:precompile --trace
  </code></pre>
  
  <p>I get the following message: <strong>undefined method `directory?' for nil:NilClass</strong></p>
  
  <p>Please help. When I look under the public/assets directory I see that the image files have been precompiled but none of the js or css files.</p>
  
  <p>Below is the full terminal output:</p>
  
  <pre><code>=&gt; RAILS_ENV=production rake assets:precompile --trace
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/rack-1.3.4/lib/rack/backports/uri/common_192.rb:53: warning: already initialized constant WFKV_
  ** Invoke assets:precompile (first_time)
  ** Execute assets:precompile
  /Users/swamiatma/.rvm/rubies/ruby-1.9.2-p290/bin/ruby /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/bin/rake assets:precompile:all RAILS_ENV=production RAILS_GROUPS=assets --trace
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/rack-1.3.4/lib/rack/backports/uri/common_192.rb:53: warning: already initialized constant WFKV_
  ** Invoke assets:precompile:all (first_time)
  ** Execute assets:precompile:all
  ** Invoke assets:precompile:primary (first_time)
  ** Invoke assets:environment (first_time)
  ** Execute assets:environment
  ** Invoke environment (first_time)
  ** Execute environment
  ** Invoke tmp:cache:clear (first_time)
  ** Execute tmp:cache:clear
  ** Execute assets:precompile:primary
  rake aborted!
  undefined method `directory?' for nil:NilClass
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/sprockets-2.0.2/lib/sprockets/base.rb:122:in `block in each_entry'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/sprockets-2.0.2/lib/sprockets/base.rb:118:in `each'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/sprockets-2.0.2/lib/sprockets/base.rb:118:in `each_entry'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/sprockets-2.0.2/lib/sprockets/base.rb:137:in `block in each_file'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/sprockets-2.0.2/lib/sprockets/base.rb:136:in `each'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/sprockets-2.0.2/lib/sprockets/base.rb:136:in `each_file'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/sprockets-2.0.2/lib/sprockets/base.rb:149:in `each_logical_path'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/actionpack-3.1.1/lib/sprockets/static_compiler.rb:18:in `compile'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/actionpack-3.1.1/lib/sprockets/assets.rake:52:in `internal_precompile'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/actionpack-3.1.1/lib/sprockets/assets.rake:66:in `block (3 levels) in &lt;top (required)&gt;'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:205:in `call'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:205:in `block in execute'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:200:in `each'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:200:in `execute'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
  /Users/swamiatma/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:144:in `invoke'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/actionpack-3.1.1/lib/sprockets/assets.rake:56:in `block (3 levels) in &lt;top (required)&gt;'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:205:in `call'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:205:in `block in execute'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:200:in `each'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:200:in `execute'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
  /Users/swamiatma/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:144:in `invoke'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:112:in `invoke_task'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:90:in `block (2 levels) in top_level'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:90:in `each'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:90:in `block in top_level'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:84:in `top_level'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:62:in `block in run'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:59:in `run'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/bin/rake:32:in `&lt;top (required)&gt;'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/bin/rake:19:in `load'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/bin/rake:19:in `&lt;main&gt;'
  Tasks: TOP =&gt; assets:precompile:primary
  rake aborted!
  Command failed with status (1): [/Users/swamiatma/.rvm/rubies/ruby-1.9.2-p2...]
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/file_utils.rb:53:in `block in create_shell_runner'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/file_utils.rb:45:in `call'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/file_utils.rb:45:in `sh'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/file_utils_ext.rb:36:in `sh'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/file_utils.rb:78:in `ruby'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/file_utils_ext.rb:36:in `ruby'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/actionpack-3.1.1/lib/sprockets/assets.rake:9:in `ruby_rake_task'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/actionpack-3.1.1/lib/sprockets/assets.rake:17:in `invoke_or_reboot_rake_task'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/gems/actionpack-3.1.1/lib/sprockets/assets.rake:25:in `block (2 levels) in &lt;top (required)&gt;'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:205:in `call'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:205:in `block in execute'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:200:in `each'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:200:in `execute'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
  /Users/swamiatma/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task.rb:144:in `invoke'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:112:in `invoke_task'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:90:in `block (2 levels) in top_level'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:90:in `each'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:90:in `block in top_level'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:84:in `top_level'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:62:in `block in run'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:59:in `run'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/bin/rake:32:in `&lt;top (required)&gt;'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/bin/rake:19:in `load'
  /Users/swamiatma/.rvm/gems/ruby-1.9.2-p290@lasource/bin/rake:19:in `&lt;main&gt;'
  Tasks: TOP =&gt; assets:precompile
  </code></pre>