-----> Ruby app detected
-----> Compiling Ruby/Rails
-----> Using Ruby version: ruby-2.3.4
###### 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 bundler 1.15.2
       Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4
       The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run `bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java`.
       Fetching gem metadata from https://rubygems.org/..........
       Fetching version metadata from https://rubygems.org/..
       Fetching dependency metadata from https://rubygems.org/.
       Resolving dependencies...
       Fetching rake 12.3.0
       Fetching concurrent-ruby 1.0.5
       Fetching minitest 5.10.3
       Installing rake 12.3.0
       Installing minitest 5.10.3
       Installing concurrent-ruby 1.0.5
       Fetching thread_safe 0.3.6
       Fetching builder 3.2.3
       Installing thread_safe 0.3.6
       Installing builder 3.2.3
       Fetching erubi 1.7.0
       Installing erubi 1.7.0
       Fetching mini_portile2 2.3.0
       Fetching crass 1.0.3
       Fetching rack 2.0.3
       Installing mini_portile2 2.3.0
       Installing crass 1.0.3
       Fetching nio4r 2.1.0
       Installing rack 2.0.3
       Installing nio4r 2.1.0 with native extensions
       Fetching websocket-extensions 0.1.3
       Installing websocket-extensions 0.1.3
       Fetching mini_mime 1.0.0
       Installing mini_mime 1.0.0
       Fetching arel 8.0.0
       Installing arel 8.0.0
       Using bundler 1.15.2
       Fetching coffee-script-source 1.12.2
       Fetching execjs 2.7.0
       Installing coffee-script-source 1.12.2
       Installing execjs 2.7.0
       Fetching method_source 0.9.0
       Installing method_source 0.9.0
       Fetching thor 0.20.0
       Fetching ffi 1.9.18
       Installing thor 0.20.0
       Fetching multi_json 1.12.2
       Installing multi_json 1.12.2
       Fetching kaminari-core 1.1.1
       Installing ffi 1.9.18 with native extensions
       Installing kaminari-core 1.1.1
       Fetching parslet 1.8.1
       Installing parslet 1.8.1
       Fetching pg 0.21.0
       Installing pg 0.21.0 with native extensions
       Fetching puma 3.11.0
       Installing puma 3.11.0 with native extensions
       Fetching rb-fsevent 0.10.2
       Installing rb-fsevent 0.10.2
       Fetching tilt 2.0.8
       Installing tilt 2.0.8
       Fetching trollop 2.1.2
       Installing trollop 2.1.2
       Fetching turbolinks-source 5.0.3
       Installing turbolinks-source 5.0.3
       Fetching i18n 0.9.1
       Installing i18n 0.9.1
       Fetching tzinfo 1.2.4
       Installing tzinfo 1.2.4
       Fetching nokogiri 1.8.1
       Installing nokogiri 1.8.1 with native extensions
       Fetching websocket-driver 0.6.5
       Installing websocket-driver 0.6.5 with native extensions
       Fetching mail 2.7.0
       Installing mail 2.7.0
       Fetching rack-test 0.8.2
       Installing rack-test 0.8.2
       Fetching sprockets 3.7.1
       Installing sprockets 3.7.1
       Fetching coffee-script 2.4.1
       Installing coffee-script 2.4.1
       Fetching uglifier 4.0.2
       Installing uglifier 4.0.2
       Fetching rb-inotify 0.9.10
       Installing rb-inotify 0.9.10
       Fetching yarn 0.1.1
       Installing yarn 0.1.1
       Fetching turbolinks 5.0.1
       Installing turbolinks 5.0.1
       Fetching activesupport 5.1.4
       Installing activesupport 5.1.4
       Fetching sass-listen 4.0.0
       Installing sass-listen 4.0.0
       Fetching globalid 0.4.1
       Installing globalid 0.4.1
       Fetching activemodel 5.1.4
       Installing activemodel 5.1.4
       Fetching jbuilder 2.7.0
       Installing jbuilder 2.7.0
       Fetching sass 3.5.3
       Installing sass 3.5.3
       Fetching activejob 5.1.4
       Installing activejob 5.1.4
       Fetching activerecord 5.1.4
       Installing activerecord 5.1.4
       Fetching kaminari-activerecord 1.1.1
       Installing kaminari-activerecord 1.1.1
       Fetching rails-dom-testing 2.0.3
       Fetching loofah 2.1.1
       Installing rails-dom-testing 2.0.3
       Installing loofah 2.1.1
       Fetching rails-html-sanitizer 1.0.3
       Installing rails-html-sanitizer 1.0.3
       Fetching actionview 5.1.4
       Installing actionview 5.1.4
       Fetching actionpack 5.1.4
       Fetching kaminari-actionview 1.1.1
       Installing kaminari-actionview 1.1.1
       Fetching kaminari 1.1.1
       Installing actionpack 5.1.4
       Installing kaminari 1.1.1
       Fetching actioncable 5.1.4
       Fetching actionmailer 5.1.4
       Fetching railties 5.1.4
       Installing actionmailer 5.1.4
       Installing actioncable 5.1.4
       Fetching sprockets-rails 3.2.1
       Installing railties 5.1.4
       Installing sprockets-rails 3.2.1
       Fetching simple_form 3.5.0
       Installing simple_form 3.5.0
       Fetching coffee-rails 4.2.2
       Fetching rails 5.1.4
       Fetching sass-rails 5.0.7
       Installing coffee-rails 4.2.2
       Installing rails 5.1.4
       Installing sass-rails 5.0.7
       Bundle complete! 16 Gemfile dependencies, 64 gems now installed.
       Gems in the groups development and test were not installed.
       Bundled gems are installed into ./vendor/bundle.
       The latest bundler is 1.16.0, but you are currently running 1.15.2.
       To update, run `gem install bundler`
       Bundle completed (30.09s)
       Cleaning up the bundler cache.
-----> Installing node-v6.11.1-linux-x64
-----> Detecting rake tasks
-----> Preparing app for Rails asset pipeline
       Running: rake assets:precompile
       Yarn executable was not detected in the system.
       Download Yarn at https://yarnpkg.com/en/docs/install
       rake aborted!
       Sprockets::ArgumentError: require_tree argument must be a directory
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/app/assets/javascripts/cable.js:6
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/directive_processor.rb:379:in `expand_relative_dirname'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/directive_processor.rb:244:in `process_require_tree_directive'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/directive_processor.rb:180:in `block in process_directives'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/directive_processor.rb:178:in `each'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/directive_processor.rb:178:in `process_directives'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/directive_processor.rb:83:in `_call'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/directive_processor.rb:68:in `call'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:75:in `call_processor'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:57:in `block in call_processors'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:56:in `reverse_each'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:56:in `call_processors'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:134:in `load_from_unloaded'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:60:in `block in load'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:317:in `fetch_asset_from_dependency_cache'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:44:in `load'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/cached_environment.rb:20:in `block in initialize'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/cached_environment.rb:47:in `load'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/bundle.rb:23:in `block in call'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/utils.rb:200:in `dfs'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/bundle.rb:24:in `call'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:75:in `call_processor'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:57:in `block in call_processors'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:56:in `reverse_each'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:56:in `call_processors'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:134:in `load_from_unloaded'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:60:in `block in load'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:317:in `fetch_asset_from_dependency_cache'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:44:in `load'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/cached_environment.rb:20:in `block in initialize'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/cached_environment.rb:47:in `load'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/base.rb:66:in `find_asset'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/base.rb:73:in `find_all_linked_assets'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/manifest.rb:142:in `block in find'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:114:in `block (2 levels) in logical_paths'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:228:in `block in stat_tree'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:212:in `block in stat_directory'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:209:in `each'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:209:in `stat_directory'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:227:in `stat_tree'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:105:in `each'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:105:in `block in logical_paths'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:104:in `each'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:104:in `logical_paths'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/manifest.rb:140:in `find'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/sprockets/manifest.rb:185:in `compile'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:68:in `block (3 levels) in define'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-3.7.1/lib/rake/sprocketstask.rb:147:in `with_logger'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:67:in `block (2 levels) in define'
       /tmp/build_bdeebbe8dd6118ed7ddf47c63ddbc1e5/vendor/bundle/ruby/2.3.0/gems/rake-12.3.0/exe/rake:27:in `<top (required)>'
       Tasks: TOP => assets:precompile
       (See full trace by running task with --trace)
 !
 !     Precompiling assets failed.
 !
 !     Push rejected, failed to compile Ruby app.
 !     Push failed