Heroku：由于gem install bundler而无法推送到Heroku

Question

突然之间，我无法推送到Heroku上，并且构建成功，但是在编译时，我看到以下内容：

remote: -----> Build succeeded!
remote: -----> Ruby app detected
remote: -----> Compiling Ruby/Rails
remote: sh: 1: gem-install-bundler: not found
remote: sh: 1: gem-install-bundler: not found
remote:  !
remote:  !     An error occurred while installing ruby-2.2.3-The-latest-bundler-is-1.15.2,-but-you-are-currently-running-1.15.1.-To-update,-run-`gem-install-bundler`
remote:  !     
remote:  !     Heroku recommends you use the latest supported Ruby version listed here:
remote:  !     https://devcenter.heroku.com/articles/ruby-support#supported-runtimes
remote:  !     
remote:  !     For more information on syntax for declaring a Ruby version see:
remote:  !     https://devcenter.heroku.com/articles/ruby-versions
remote:  !     
remote:  !     
remote:  !     Debug InformationCommand: 'set -o pipefail; curl -L --fail --retry 5 --retry-delay 1 --connect-timeout 3 --max-time 30 https://s3-external-1.amazonaws.com/heroku-buildpack-ruby/cedar-14/ruby-2.2.3-The-latest-bundler-is-1.15.2,-but-you-are-currently-running-1.15.1.-To-update,-run-`gem-install-bundler`.tgz -s -o - | tar zxf - ' failed unexpectedly:
remote:  !     bash: gem-install-bundler: command not found
remote:  !     
remote:  !     gzip: stdin: unexpected end of file
remote:  !     tar: Child returned status 1
remote:  !     tar: Error is not recoverable: exiting now
remote:  !
remote:  !     Push rejected, failed to compile Ruby app.
remote: 
remote:  !     Push failed

据我所知，我认为我需要更新捆绑软件，因此我将捆绑软件更新为1.15.2版，并尝试再次将其推上去，但是显示了相同的错误。 我的gemfile.lock甚至说BUNDLED WITH 1.15.2 。

我有什么想念的吗？

Answer 1

我联系了Heroku，他们向我展示了我有多个buildpack：

感谢您就安装红宝石方面的问题与我们联系。 似乎该应用程序为Ruby指定了两次Heroku Buildpack，而后者指定了主版本，而不是发行版本：

$ heroku buildpacks -a app-name
=== app-name Buildpack URLs
1. heroku/ruby
2. https://github.com/heroku/heroku-buildpack-nodejs.git
3. https://github.com/heroku/heroku-buildpack-ruby.git

然后，他们继续向我展示如何解决该问题：

您能否尝试一次指定每个buildpack以及使用发布的版本来查看问题是否持久？

$ heroku buildpacks:remove -i 3 -a app-name
$ heroku buildpacks:remove -i 2 -a app-name
$ heroku buildpacks:remove -i 1 -a app-name
$ heroku buildpacks:add heroku/nodejs -a app-name
$ heroku buildpacks:add heroku/ruby -a app-name
$ git push heroku master

这解决了一切！

Answer 2

您是否将生成的Gemfile.lock检查到版本控制中

git add Gemfile.lock