ruby-on-rails - merge 分支和包更新后不推送到 heroku

Question

我做了几处更改，并尝试推送到 heroku，但它崩溃了，并给了我调试器 gem 的错误，我在堆栈溢出中搜索了它。

我做了 bundle update 来修复它(正如人们所说)，并从 gemfile 中删除了调试器。但是现在，它又会报错，不会推送或编译 Assets 。

错误是:

 NoMethodError: undefined method `environment' for nil:NilClass

这太奇怪了，因为它正在重新安装 Heroku 中的每个 gem，并且像第一次一样编译 Assets 。请帮忙，我无法推送新功能!非常感谢

-----> Ruby app detected
-----> Compiling Ruby/Rails
-----> Using Ruby version: ruby-2.0.0
-----> Installing dependencies using 1.6.3
       Ruby version change detected. Clearing bundler cache.
       Old: ruby 2.0.0p481 (2014-05-08 revision 45883) [x86_64-linux]
       New: ruby 2.0.0p576 (2014-09-19 revision 47628) [x86_64-linux]
       Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
       Fetching source index from https://rubygems.org/
       Fetching git://github.com/gregbell/active_admin.git
       Installing minitest 4.7.5
       Installing i18n 0.6.11
       Installing rake 10.3.2
       Installing thread_safe 0.3.4
       Installing multi_json 1.10.1
       Installing builder 3.1.4
       Installing erubis 2.7.0
       Installing tzinfo 0.3.41
       Installing mime-types 1.25.1
       Installing rack 1.5.2
       Installing polyglot 0.3.5
       Installing coffee-script-source 1.8.0
       Installing thor 0.19.1
       Installing execjs 2.2.1
       Installing sass 3.4.4
       Using bundler 1.6.3
       Installing activerecord-deprecated_finders 1.0.3
       Installing hike 1.2.3
       Installing arel 4.0.2
       Installing tilt 1.4.1
       Installing acts_as_votable 0.8.0
       Installing coderay 1.1.0
       Installing daemons 1.1.9
       Installing orm_adapter 0.5.0
       Installing json 1.8.1
       Installing bcrypt 3.1.7
       Installing multipart-post 2.0.0
       Installing formatador 0.2.5
       Installing excon 0.39.5
       Installing inflecto 0.0.2
       Installing ipaddress 0.8.0
       Installing mini_portile 0.6.0
       Installing net-ssh 2.9.1
       Installing hashie 3.3.1
       Installing jwt 1.0.0
       Installing method_source 0.8.2
       Installing subexec 0.2.3
       Installing multi_xml 0.5.5
       Installing nifty-generators 0.4.6
       Installing httpclient 2.4.0
       Installing slop 3.6.0
       Installing rails_serve_static_assets 0.0.2
       Installing rails_stdout_logging 0.0.3
       Installing eventmachine 1.0.3
       Installing rolify 3.4.1
       Installing will_paginate 3.0.7
       Installing faker 1.3.0
       Installing fog-json 1.0.0
       Installing sitemap_generator 5.0.5
       Installing activesupport 4.0.0
       Installing rack-test 0.6.2
       Installing pg 0.17.1
       Installing warden 1.2.3
       Installing coffee-script 2.3.0
       Installing treetop 1.4.15
       Installing bourbon 4.0.2
       Installing sprockets 2.12.2
       Installing haml 4.0.5
       Installing zurb-foundation 4.3.2
       Installing rdoc 4.1.2
       Installing uglifier 2.5.3
       Installing faraday 0.9.0
       Installing mandrill-api 1.0.52
       Installing net-scp 1.2.1
       Installing omniauth 1.2.2
       Installing mini_magick 3.8.1
       Installing pry 0.10.1
       Installing rails_12factor 0.0.2
       Installing thin 1.6.2
       Installing arbre 1.0.2
       Installing activemodel 4.0.0
       Installing jbuilder 1.5.3
       Installing actionpack 4.0.0
       Installing rmagick 2.13.3
       Installing mail 2.5.4
       Installing faraday_middleware 0.9.1
       Installing sdoc 0.4.1
       Installing oauth2 1.0.0
       Installing activerecord 4.0.0
       Installing fog-core 1.24.0
       Installing carrierwave 0.10.0
       Installing railties 4.0.0
       Installing formtastic 2.3.1
       Installing has_scope 0.6.0.rc
       Installing kaminari 0.16.1
       Installing sprockets-rails 2.0.1
       Installing meta-tags 2.0.0
       Installing mandrill_mailer 0.4.8
       Installing actionmailer 4.0.0
       Installing simple_form 3.0.2
       Installing omniauth-oauth2 1.2.0
       Installing polyamorous 1.1.0
       Installing instagram 1.1.3
       Installing friendly_id 5.0.4
       Installing fog-brightbox 0.5.1
       Installing coffee-rails 4.0.1
       Installing fog-softlayer 0.3.17
       Installing nokogiri 1.6.3.1
       Installing responders 1.0.0
       Installing jquery-ui-rails 5.0.0
       Installing jquery-rails 3.1.2
       Installing devise 3.3.0
       Installing jquery-fileupload-rails 0.4.1
       Installing mail_form 1.5.0
       Installing sass-rails 4.0.1
       Installing omniauth-facebook 2.0.0
       Installing ransack 1.3.0
       Installing rails 4.0.0
       Installing impressionist 1.5.1
       Installing best_in_place 0.2.3
       Installing inherited_resources 1.4.1
       Installing rails3-jquery-autocomplete 1.0.14
       Using activeadmin 1.0.0.pre from git://github.com/gregbell/active_admin.git (at master)
       Installing fog 1.23.0
       Your bundle is complete!
       Gems in the groups development and test were not installed.
       It was installed into ./vendor/bundle
       Post-install message from sitemap_generator:
       NOTE: SitemapGenerator 4.x uses a new file naming scheme which is more standards-compliant.
       If you're upgrading from 3.x, please see the release note in the README:
       https://github.com/kjvarga/sitemap_generator#important-changes-in-version-4
       The simple answer is that your index file is now called sitemap.xml.gz
       and not sitemap_index.xml.gz, but please take a look and see what else has changed.
       Post-install message from haml:
       HEADS UP! Haml 4.0 has many improvements, but also has changes that may break
       your application:
       * Support for Ruby 1.8.6 dropped
       * Support for Rails 2 dropped
       * Sass filter now always outputs <style> tags
       * Data attributes are now hyphenated, not underscored
       * html2haml utility moved to the html2haml gem
       * Textile and Maruku filters moved to the haml-contrib gem
       For more info see:
       http://rubydoc.info/github/haml/haml/file/CHANGELOG.md
       Post-install message from rdoc:
       Depending on your version of ruby, you may need to install ruby rdoc/ri data:
       <= 1.8.6 : unsupported
       = 1.8.7 : gem install rdoc-data; rdoc-data --install
       = 1.9.1 : gem install rdoc-data; rdoc-data --install
       >= 1.9.2 : nothing to do! Yay!
       Post-install message from rmagick:
       Please report any bugs. See https://github.com/gemhome/rmagick/compare/RMagick_2-13-2...master and https://github.com/rmagick/rmagick/issues/18
       Post-install message from instagram:
       ********************************************************************************
       Instagram REST and Search APIs
       ------------------------------
       Our developer site documents all the Instagram REST and Search APIs.
       (http://instagram.com/developer)
       Blog
       ----------------------------
       ********************************************************************************
       Bundle completed (159.26s)
       Cleaning up the bundler cache.
-----> Writing config/database.yml to read from DATABASE_URL
-----> Preparing app for Rails asset pipeline
       Running: rake assets:precompile
       [deprecated] I18n.enforce_available_locales will default to true in the future. If you really want to skip validation of your locale you can set I18n.enforce_available_locales = false to avoid this message.
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       rake aborted!
       NoMethodError: undefined method `environment' for nil:NilClass
       (in /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/app/assets/stylesheets/foundation_and_overrides.scss)
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-rails-4.0.1/lib/sass/rails/importer.rb:84:in `evaluate'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-rails-4.0.1/lib/sass/rails/importer.rb:70:in `engine_from_path'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-rails-4.0.1/lib/sass/rails/importer.rb:35:in `find'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/import_node.rb:54:in `block in import'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/import_node.rb:53:in `each'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/import_node.rb:53:in `import'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/import_node.rb:28:in `imported_file'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/import_node.rb:37:in `css_import?'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/perform.rb:301:in `visit_import'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/base.rb:36:in `visit'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/stack.rb:79:in `block in with_base'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/stack.rb:115:in `with_frame'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/stack.rb:79:in `with_base'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/perform.rb:158:in `visit'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/base.rb:52:in `block in visit_children'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/base.rb:52:in `map'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/base.rb:52:in `visit_children'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/perform.rb:167:in `block in visit_children'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/perform.rb:166:in `visit_children'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/base.rb:36:in `block in visit'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/perform.rb:186:in `visit_root'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/base.rb:36:in `visit'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/perform.rb:157:in `visit'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/visitors/perform.rb:8:in `visit'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/root_node.rb:36:in `css_tree'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/tree/root_node.rb:20:in `render'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sass-3.4.4/lib/sass/engine.rb:268:in `render'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/sass_template.rb:53:in `evaluate'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/tilt-1.4.1/lib/tilt/template.rb:103:in `render'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/context.rb:197:in `block in evaluate'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/context.rb:194:in `each'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/context.rb:194:in `evaluate'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/processed_asset.rb:12:in `initialize'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:374:in `new'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:374:in `block in build_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:395:in `circular_call_protection'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:373:in `build_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/index.rb:94:in `block in build_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/caching.rb:58:in `cache_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/index.rb:93:in `build_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:287:in `find_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/index.rb:61:in `find_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/processed_asset.rb:111:in `block in resolve_dependencies'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/processed_asset.rb:105:in `each'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/processed_asset.rb:105:in `resolve_dependencies'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/processed_asset.rb:97:in `build_required_assets'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/processed_asset.rb:16:in `initialize'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:374:in `new'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:374:in `block in build_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:395:in `circular_call_protection'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:373:in `build_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/index.rb:94:in `block in build_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/caching.rb:58:in `cache_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/index.rb:93:in `build_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:287:in `find_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/index.rb:61:in `find_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/bundled_asset.rb:16:in `initialize'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:377:in `new'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:377:in `build_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/index.rb:94:in `block in build_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/caching.rb:58:in `cache_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/index.rb:93:in `build_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/base.rb:287:in `find_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/index.rb:61:in `find_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/manifest.rb:211:in `block in find_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/manifest.rb:257:in `benchmark'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/manifest.rb:210:in `find_asset'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/manifest.rb:119:in `block in compile'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/manifest.rb:118:in `each'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/sprockets/manifest.rb:118:in `compile'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-rails-2.0.1/lib/sprockets/rails/task.rb:60:in `block (3 levels) in define'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-2.12.2/lib/rake/sprocketstask.rb:146:in `with_logger'
       /tmp/build_0c151ed0-2c3a-484c-bfdf-a8944781130b/vendor/bundle/ruby/2.0.0/gems/sprockets-rails-2.0.1/lib/sprockets/rails/task.rb:59:in `block (2 levels) in define'
       Tasks: TOP => assets:precompile
       (See full trace by running task with --trace)
 !
 !     Precompiling assets failed.
 !

 !     Push rejected, failed to compile Ruby app

Answer 1

我遇到了同样的问题并解决了它:

根据您的日志，您的 RVM gemset 是 2.0.0p481。 Heroku 已经升级到 2.0.0p576。

您需要升级到最新的 Ruby 包。如果您使用的是 RVM:

rvm install ruby-2.0.0-p576
bundle update

然后提交并部署到 heroku。