我正在为Udemy课程开发Web应用程序，即使在预览中一切正常，我也注意到heroku有时没有收到更新。当我尝试git push heroku master时，会发生以下情况：
Counting objects: 219, done.
Compressing objects: 100% (216/216), done.
Writing objects: 100% (219/219), 607.44 KiB | 6.20 MiB/s, done.
Total 219 (delta 44), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Ruby app detected
remote: -----> Compiling Ruby/Rails
remote: -----> Using Ruby version: ruby-2.4.1
remote: -----> Installing dependencies using bundler 1.15.2
remote: Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
remote: Warning: the running version of Bundler (1.15.2) is older than the version that created the lockfile (1.17.1). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
remote: Fetching gem metadata from https://rubygems.org/.........
remote: Fetching version metadata from https://rubygems.org/..
remote: Fetching dependency metadata from https://rubygems.org/.
remote: Using rake 12.3.1
remote: Fetching concurrent-ruby 1.1.2
remote: Using minitest 5.11.3
remote: Using thread_safe 0.3.6
remote: Using builder 3.2.3
remote: Using erubi 1.7.1
remote: Using mini_portile2 2.3.0
remote: Using crass 1.0.4
remote: Fetching rack 2.0.6
remote: Using nio4r 2.3.1
remote: Using websocket-extensions 0.1.3
remote: Using mini_mime 1.0.1
remote: Using arel 9.0.0
remote: Using mimemagic 0.3.2
remote: Using execjs 2.7.0
remote: Using msgpack 1.2.4
remote: Using rb-fsevent 0.10.3
remote: Using ffi 1.9.25
remote: Using bundler 1.15.2
remote: Using coffee-script-source 1.12.2
remote: Fetching method_source 0.9.1
remote: Installing method_source 0.9.1
remote: Using thor 0.20.0
remote: Using multi_json 1.13.1
remote: Using pg 1.1.3
remote: Using puma 3.12.0
remote: Using rails_serve_static_assets 0.0.5
remote: Using rails_stdout_logging 0.0.5
remote: Using tilt 2.0.8
remote: Using turbolinks-source 5.2.0
remote: Using tzinfo 1.2.5
remote: Using nokogiri 1.8.5
remote: Using websocket-driver 0.7.0
remote: Using mail 2.7.1
remote: Using marcel 0.3.3
remote: Using autoprefixer-rails 9.3.1
remote: Using uglifier 4.1.19
remote: Using bootsnap 1.3.2
remote: Using rb-inotify 0.9.10
remote: Using coffee-script 2.4.1
remote: Using rails_12factor 0.0.3
remote: Using turbolinks 5.2.0
remote: Using loofah 2.2.3
remote: Using sass-listen 4.0.0
remote: Using rails-html-sanitizer 1.0.4
remote: Fetching sass 3.7.0
remote: Installing concurrent-ruby 1.1.2
remote: Installing rack 2.0.6
remote: Installing sass 3.7.0
remote: Using i18n 1.1.1
remote: Using activesupport 5.2.1
remote: Using rails-dom-testing 2.0.3
remote: Using globalid 0.4.1
remote: Using activemodel 5.2.1
remote: Fetching jbuilder 2.8.0
remote: Using actionview 5.2.1
remote: Using activejob 5.2.1
remote: Using activerecord 5.2.1
remote: Using rack-test 1.1.0
remote: Using sprockets 3.7.2
remote: Using actionpack 5.2.1
remote: Using bootstrap-sass 3.3.7
remote: Using actioncable 5.2.1
remote: Using actionmailer 5.2.1
remote: Using activestorage 5.2.1
remote: Using railties 5.2.1
remote: Using sprockets-rails 3.2.1
remote: Using coffee-rails 4.2.2
remote: Fetching font-awesome-rails 4.7.0.4
remote: Installing jbuilder 2.8.0
remote: Fetching jquery-rails 4.3.3
remote: Using rails 5.2.1
remote: Using sass-rails 5.0.7
remote: Installing jquery-rails 4.3.3
remote: Installing font-awesome-rails 4.7.0.4
remote: Bundle complete! 23 Gemfile dependencies, 68 gems now installed.
remote: Gems in the groups development and test were not installed.
remote: Bundled gems are installed into ./vendor/bundle.
remote: Post-install message from sass:
remote:
remote: Ruby Sass is deprecated and will be unmaintained as of 26 March 2019.
remote:
remote: * If you use Sass as a command-line tool, we recommend using Dart Sass, the new
remote: primary implementation: https://sass-lang.com/install
remote:
remote: * If you use Sass as a plug-in for a Ruby web framework, we recommend using the
remote: sassc gem: https://github.com/sass/sassc-ruby#readme
remote:
remote: * For more details, please refer to the Sass blog:
remote: http://sass.logdown.com/posts/7081811
remote:
remote: Bundle completed (3.60s)
remote: Cleaning up the bundler cache.
remote: Warning: the running version of Bundler (1.15.2) is older than the version that created the lockfile (1.17.1). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
remote: Removing jbuilder (2.7.0)
remote: Removing method_source (0.9.0)
remote: Removing rack (2.0.5)
remote: Removing concurrent-ruby (1.0.5)
remote: Removing sass (3.6.0)
remote: The latest bundler is 2.0.0.pre.1, but you are currently running 1.15.2.
remote: To update, run `gem install bundler --pre`
remote: -----> Installing node-v8.10.0-linux-x64
remote: -----> Detecting rake tasks
remote: -----> Preparing app for Rails asset pipeline
remote: Running: rake assets:precompile
remote: Yarn executable was not detected in the system.
remote: Download Yarn at https://yarnpkg.com/en/docs/install
remote: I, [2018-11-10T02:53:43.116047 #407] INFO -- : Writing /tmp/build_6086175200f5550c5b9817387635ee22/public/assets/application-50b71e7b0b661292fd6fba40f84e1a84bfbb82bd7cccf29f36f75e6851fc30f1.js
remote: I, [2018-11-10T02:53:43.116490 #407] INFO -- : Writing /tmp/build_6086175200f5550c5b9817387635ee22/public/assets/application-50b71e7b0b661292fd6fba40f84e1a84bfbb82bd7cccf29f36f75e6851fc30f1.js.gz
remote: rake aborted!
remote: Sass::SyntaxError: Invalid CSS after "...top: 4px solid ": expected ";", was "\ ;"
remote: (sass):4014
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:1305:in `expected'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:1235:in `expected'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:1230:in `tok!'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:815:in `block in try_declaration'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:1281:in `rethrow'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:820:in `try_declaration'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:743:in `declaration_or_ruleset'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:708:in `block_child'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:700:in `block_contents'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:689:in `block'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:681:in `ruleset'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:707:in `block_child'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:700:in `block_contents'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:137:in `stylesheet'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/scss/parser.rb:41:in `parse'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/engine.rb:414:in `_to_tree'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sass-3.7.0/lib/sass/engine.rb:290:in `render'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/sass_compressor.rb:48:in `call'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/sass_compressor.rb:28:in `call'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:75:in `call_processor'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:57:in `block in call_processors'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:56:in `reverse_each'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:56:in `call_processors'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/loader.rb:134:in `load_from_unloaded'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/loader.rb:60:in `block in load'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/loader.rb:317:in `fetch_asset_from_dependency_cache'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/loader.rb:44:in `load'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/cached_environment.rb:20:in `block in initialize'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/cached_environment.rb:47:in `load'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/base.rb:66:in `find_asset'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/base.rb:73:in `find_all_linked_assets'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/manifest.rb:142:in `block in find'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/legacy.rb:114:in `block (2 levels) in logical_paths'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/path_utils.rb:228:in `block in stat_tree'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/path_utils.rb:212:in `block in stat_directory'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/path_utils.rb:209:in `each'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/path_utils.rb:209:in `stat_directory'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/path_utils.rb:227:in `stat_tree'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/legacy.rb:105:in `each'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/legacy.rb:105:in `block in logical_paths'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/legacy.rb:104:in `each'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/legacy.rb:104:in `logical_paths'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/manifest.rb:140:in `find'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/sprockets/manifest.rb:186:in `compile'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:68:in `block (3 levels) in define'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.2/lib/rake/sprocketstask.rb:147:in `with_logger'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:67:in `block (2 levels) in define'
remote: /tmp/build_6086175200f5550c5b9817387635ee22/vendor/bundle/ruby/2.4.0/gems/rake-12.3.1/exe/rake:27:in `<top (required)>'
remote: Tasks: TOP => assets:precompile
remote: (See full trace by running task with --trace)
remote:
remote: !
remote: ! Precompiling assets failed.
remote: !
remote: ! Push rejected, failed to compile Ruby app.
remote:
remote: ! Push failed
remote: Verifying deploy...
remote:
remote: ! Push rejected to haunted-pumpkin-39985.
remote:
To https://git.heroku.com/haunted-pumpkin-39985.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/haunted-pumpkin-39985.git'
我注意到错误“在系统中未检测到纱线可执行文件”。我到处搜索，并按照安装纱的说明和此问题中的说明进行操作：Rails precompile assets Yarn executable was not detected
仍然没有帮助。我不确定这是否是为什么heroku无法更新的问题。我也注意到运行
的评论gem install bundler --pre
我这样做了，终端上的一切似乎都可以正常安装，但是即使在推送后，在尝试推送到heroku时，我仍然会遇到相同的错误。非常感谢您的帮助，我感觉自己在这里看不到任何东西。
编辑：对我来说摆脱这个错误的原因是
gem install sassc
我现在有一个完全不同的错误，但是如果我不明白，那是针对另一个线程的错误。谢谢大家的帮助！
答案 0 :(得分：0)
对于这个特定问题，我的问题是Sass。正在运行
gem install sassc
为我解决了这个问题。我仍然无法部署到heroku来处理Bundler问题，但是不再存在关于预编译资产的问题。