strange heroku push error

error

Fetching repository, done.
Counting objects: 10, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (6/6), done.
Writing objects: 100% (6/6), 551 bytes | 0 bytes/s, done.
Total 6 (delta 5), reused 0 (delta 0)

-----> Ruby app detected
-----> Compiling Ruby/Rails
-----> Using Ruby version: ruby-1.9.3
-----> Installing dependencies using Bundler version 1.3.2
       Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin --deployment
       Using rake (10.1.0)
       Using i18n (0.6.5)
       Using multi_json (1.8.2)
       Using activesupport (3.2.14)
       Using builder (3.0.4)
       Using activemodel (3.2.14)
       Using erubis (2.7.0)
       Using journey (1.0.4)
       Using rack (1.4.5)
       Using rack-cache (1.2)
       Using rack-test (0.6.2)
       Using hike (1.2.3)
       Using tilt (1.4.1)
       Using sprockets (2.2.2)
       Using actionpack (3.2.14)
       Using mime-types (1.25)
       Using polyglot (0.3.3)
       Using treetop (1.4.15)
       Using mail (2.5.4)
       Using actionmailer (3.2.14)
       Using arel (3.0.3)
       Using tzinfo (0.3.38)
       Using activerecord (3.2.14)
       Using activeresource (3.2.14)
       Using atomic (1.1.14)
       Using auto_strip_attributes (2.0.4)
       Using bcrypt-ruby (3.1.2)
       Using json (1.8.1)
       Using carrierwave (0.9.0)
       Using chunky_png (1.2.9)
       Using coffee-script-source (1.6.3)
       Using execjs (2.0.2)
       Using coffee-script (2.2.0)
       Using rack-ssl (1.3.3)
       Using rdoc (3.12.2)
       Using thor (0.18.1)
       Using railties (3.2.14)
       Using coffee-rails (3.2.2)
       Using fssm (0.2.10)
       Using sass (3.2.12)
       Using compass (0.12.2)
       Using compass-rails (1.1.2)
       Using daemons (1.1.9)
       Using dalli (2.6.4)
       Using delayed_job (4.0.0)
       Using delayed_job_active_record (4.0.0)
       Using orm_adapter (0.5.0)
       Using thread_safe (0.1.3)
       Using warden (1.2.3)
       Using devise (3.2.1)
       Using excon (0.28.0)
       Using formatador (0.2.4)
       Using net-ssh (2.7.0)
       Using net-scp (1.1.2)
       Using mini_portile (0.5.2)
       Using nokogiri (1.6.0)
       Using ruby-hmac (0.4.0)
       Using fog (1.18.0)
       Using foreigner (1.6.0)
       Using haml (4.1.0.alpha.2)
       Using haml-rails (0.4)
       Using jquery-fileupload-rails (0.4.1)
       Using jquery-rails (3.0.4)
       Using jquery-ui-rails (4.1.0)
       Using jquery-validation-rails (1.11.1)
       Using kaminari (0.15.0)
       Using kgio (2.8.1)
       Using bundler (1.3.2)
       Using rails (3.2.14)
       Using mailboxer (0.11.0)
       Using memcachier (0.0.2)
       Using newrelic_rpm (3.6.9.171)
       Using xml-simple (1.1.2)
       Using paypal-sdk-core (0.2.6)
       Using paypal-sdk-adaptivepayments (1.105.0)
       Using pg (0.17.0)
       Using rails_serve_static_assets (0.0.1)
       Using rails_stdout_logging (0.0.3)
       Using rails_12factor (0.0.2)
       Using raindrops (0.12.0)
       Using rmagick (2.13.2)
       Using sass-rails (3.2.6)
       Using s3_direct_upload (0.1.6)
       Using shadowbox-rails (0.0.4)
       Using uglifier (2.3.1)
       Using unf_ext (0.0.6)
       Using unf (0.1.3)
       Using unicorn (4.7.0)
       Using yui-compressor (0.12.0)
       Your bundle is complete! It was installed into ./vendor/bundle
       Bundle completed (0.71s)
       Cleaning up the bundler cache.
-----> Writing config/database.yml to read from DATABASE_URL
       Could not detect rake tasks
       ensure you can run `$ bundle exec rake -P` against your app with no environment variables present
       and using the production group of your Gemfile.
       This may be intentional, if you expected rake tasks to be run
       cancel the build (CTRL+C) and fix the error then commit the fix:
       rake aborted!
       cannot load such file -- active_record/railtie
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/config/application.rb:4:in `require'
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/config/application.rb:4:in `<top (required)>'
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/Rakefile:5:in `require'
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/Rakefile:5:in `<top (required)>'
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/vendor/ruby-1.9.3/lib/ruby/1.9.1/rake/rake_module.rb:25:in `load'
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/vendor/ruby-1.9.3/lib/ruby/1.9.1/rake/rake_module.rb:25:in `load_rakefile'
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/vendor/ruby-1.9.3/lib/ruby/1.9.1/rake/application.rb:501:in `raw_load_rakefile'
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/vendor/ruby-1.9.3/lib/ruby/1.9.1/rake/application.rb:82:in `block in load_rakefile'
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/vendor/ruby-1.9.3/lib/ruby/1.9.1/rake/application.rb:133:in `standard_exception_handling'
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/vendor/ruby-1.9.3/lib/ruby/1.9.1/rake/application.rb:81:in `load_rakefile'
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/vendor/ruby-1.9.3/lib/ruby/1.9.1/rake/application.rb:65:in `block in run'
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/vendor/ruby-1.9.3/lib/ruby/1.9.1/rake/application.rb:133:in `standard_exception_handling'
       /tmp/build_9abc0c91-cfad-4b19-b391-9a9a64e3582e/vendor/ruby-1.9.3/lib/ruby/1.9.1/rake/application.rb:63:in `run'
       vendor/ruby-1.9.3/bin/rake:38:in `<main>'
-----> Discovering process types
       Procfile declares types -> web, worker
       Default types for Ruby  -> console, rake

-----> Compressing... done, 29.2MB
-----> Launching... done, v36
-----> Deploy hooks scheduled, check output in your logs
       http://staging-grailed.herokuapp.com deployed to Heroku

To git@heroku.com:staging-grailed.git
   3323ae7..1b69562  master -> master