如何将应用程序从Ruby 2.0.0降级到1.9.3
我的应用程序使用的是Ruby 2.0.0-p247，但我需要降级到1.9.3（对我的应用程序至关重要的自定义模块在2.0.0中不起作用，但在1.9.3中起作用）。
为此，我更新了我的gemfile
ruby '1.9.3' 在我输入的命令行中：
rvm use 1.9.3
我还编辑了.ruby-version文件并将其内容替换为：
1.9.3
我运行了bundle install，然后输入以下命令尝试启动应用程序：
rails s
它试图启动，但然后给出一个分段错误（很久以来我看到其中一个）。 输出的错误粘贴在下面。
/Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json/common.rb:67: [BUG] Segmentation fault ruby 1.9.3p448 (2013-06-27 revision 41675) [x86_64-darwin12.4.0] -- Control frame information ----------------------------------------------- c:0048 p:---- s:0137 b:0137 l:000136 d:000136 CFUNC :initialize c:0047 p:---- s:0135 b:0135 l:000134 d:000134 CFUNC :new c:0046 p:0099 s:0132 b:0130 l:000129 d:000129 METHOD /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json/common.rb:67 c:0045 p:0090 s:0121 b:0120 l:000119 d:000119 CLASS /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json/ext.rb:17 c:0044 p:0011 s:0118 b:0118 l:000117 d:000117 CLASS /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json/ext.rb:12 c:0043 p:0074 s:0116 b:0116 l:000115 d:000115 TOP /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json/ext.rb:9 c:0042 p:---- s:0114 b:0114 l:000113 d:000113 FINISH c:0041 p:---- s:0112 b:0112 l:000111 d:000111 CFUNC :require c:0040 p:0027 s:0108 b:0108 l:000107 d:000107 CLASS /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json.rb:58 c:0039 p:0021 s:0106 b:0106 l:000105 d:000105 TOP /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json.rb:54 c:0038 p:---- s:0104 b:0104 l:000103 d:000103 FINISH c:0037 p:---- s:0102 b:0102 l:000101 d:000101 CFUNC :require c:0036 p:0013 s:0098 b:0098 l:000097 d:000097 TOP /Users/taimoor/railsdev/connect/vendor/bundle/gems/activesupport-4.0.0/lib/active_support/core_ext/object/to_json.rb:3 c:0035 p:---- s:0096 b:0096 l:000095 d:000095 FINISH c:0034 p:---- s:0094 b:0094 l:000093 d:000093 CFUNC :require c:0033 p:0107 s:0090 b:0090 l:000089 d:000089 TOP /Users/taimoor/railsdev/connect/vendor/bundle/gems/activesupport-4.0.0/lib/active_support/core_ext/object.rb:11 c:0032 p:---- s:0088 b:0088 l:000087 d:000087 FINISH c:0031 p:---- s:0086 b:0086 l:000085 d:000085 CFUNC :require c:0030 p:0035 s:0082 b:0082 l:000081 d:000081 TOP /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/configuration.rb:3 c:0029 p:---- s:0080 b:0080 l:000079 d:000079 FINISH c:0028 p:---- s:0078 b:0078 l:000077 d:000077 CFUNC :require c:0027 p:0023 s:0074 b:0074 l:000073 d:000073 TOP /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/railtie.rb:2 c:0026 p:---- s:0072 b:0072 l:000071 d:000071 FINISH c:0025 p:---- s:0070 b:0070 l:000069 d:000069 CFUNC :require c:0024 p:0011 s:0066 b:0066 l:000065 d:000065 TOP /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/engine.rb:1 c:0023 p:---- s:0064 b:0064 l:000063 d:000063 FINISH c:0022 p:---- s:0062 b:0062 l:000061 d:000061 CFUNC :require c:0021 p:0047 s:0058 b:0058 l:000057 d:000057 TOP /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/application.rb:4 c:0020 p:---- s:0056 b:0056 l:000055 d:000055 FINISH c:0019 p:---- s:0054 b:0054 l:000053 d:000053 CFUNC :require c:0018 p:0071 s:0050 b:0050 l:000049 d:000049 TOP /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails.rb:9 c:0017 p:---- s:0048 b:0048 l:000047 d:000047 FINISH c:0016 p:---- s:0046 b:0046 l:000045 d:000045 CFUNC :require c:0015 p:0011 s:0042 b:0042 l:000041 d:000041 TOP /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/all.rb:1 c:0014 p:---- s:0040 b:0040 l:000039 d:000039 FINISH c:0013 p:---- s:0038 b:0038 l:000037 d:000037 CFUNC :require c:0012 p:0038 s:0034 b:0034 l:000033 d:000033 TOP /Users/taimoor/railsdev/connect/config/application.rb:3 c:0011 p:---- s:0032 b:0032 l:000031 d:000031 FINISH c:0010 p:---- s:0030 b:0030 l:000029 d:000029 CFUNC :require c:0009 p:0016 s:0026 b:0026 l:000017 d:000025 BLOCK /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/commands.rb:76 c:0008 p:---- s:0023 b:0023 l:000022 d:000022 FINISH c:0007 p:---- s:0021 b:0021 l:000020 d:000020 CFUNC :tap c:0006 p:0793 s:0018 b:0018 l:000017 d:000017 TOP /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/commands.rb:73 c:0005 p:---- s:0012 b:0012 l:000011 d:000011 FINISH c:0004 p:---- s:0010 b:0010 l:000009 d:000009 CFUNC :require c:0003 p:0046 s:0006 b:0006 l:002008 d:000498 EVAL bin/rails:4 c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH c:0001 p:0000 s:0002 b:0002 l:002008 d:002008 TOP -- Ruby level backtrace information ---------------------------------------- bin/rails:4:in `' bin/rails:4:in `require' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/commands.rb:73:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/commands.rb:73:in `tap' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/commands.rb:76:in `block in ' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/commands.rb:76:in `require' /Users/taimoor/railsdev/connect/config/application.rb:3:in `' /Users/taimoor/railsdev/connect/config/application.rb:3:in `require' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/all.rb:1:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/all.rb:1:in `require' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails.rb:9:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails.rb:9:in `require' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/application.rb:4:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/application.rb:4:in `require' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/engine.rb:1:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/engine.rb:1:in `require' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/railtie.rb:2:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/railtie.rb:2:in `require' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/configuration.rb:3:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/railties-4.0.0/lib/rails/configuration.rb:3:in `require' /Users/taimoor/railsdev/connect/vendor/bundle/gems/activesupport-4.0.0/lib/active_support/core_ext/object.rb:11:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/activesupport-4.0.0/lib/active_support/core_ext/object.rb:11:in `require' /Users/taimoor/railsdev/connect/vendor/bundle/gems/activesupport-4.0.0/lib/active_support/core_ext/object/to_json.rb:3:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/activesupport-4.0.0/lib/active_support/core_ext/object/to_json.rb:3:in `require' /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json.rb:54:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json.rb:58:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json.rb:58:in `require' /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json/ext.rb:9:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json/ext.rb:12:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json/ext.rb:17:in `' /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json/common.rb:67:in `generator=' /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json/common.rb:67:in `new' /Users/taimoor/railsdev/connect/vendor/bundle/gems/json-1.8.1/lib/json/common.rb:67:in `initialize' -- C level backtrace information ------------------------------------------- See Crash Report log file under ~/Library/Logs/CrashReporter or /Library/Logs/CrashReporter, for the more detail of. -- Other runtime information ----------------------------------------------- * Loaded script: bin/rails * Loaded features: 0 enumerator.so 1 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/enc/encdb.bundle 2 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/enc/trans/transdb.bundle 3 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/rbconfig.rb 4 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/compatibility.rb 5 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/defaults.rb 6 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/deprecate.rb 7 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/errors.rb 8 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/version.rb 9 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/requirement.rb 10 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/platform.rb 11 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/basic_specification.rb 12 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/stub_specification.rb 13 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/util/stringio.rb 14 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb 15 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/exceptions.rb 16 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_gem.rb 17 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/thread.rb 18 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/monitor.rb 19 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb 20 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems.rb 21 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/pathname.bundle 22 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/pathname.rb 23 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/io/console.bundle 24 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/user_interaction.rb 25 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/etc.bundle 26 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb 27 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/rubygems_integration.rb 28 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb 29 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/shared_helpers.rb 30 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/fileutils.rb 31 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/gem_path_manipulation.rb 32 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/gem_helpers.rb 33 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/match_platform.rb 34 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/rubygems_ext.rb 35 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/version.rb 36 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler.rb 37 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/settings.rb 38 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/digest.bundle 39 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/digest.rb 40 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/digest/sha1.bundle 41 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/set.rb 42 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/definition.rb 43 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/dependency.rb 44 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/ruby_dsl.rb 45 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/dsl.rb 46 /Users/taimoor/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/source.rb 47 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/uri/common.rb 48 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/uri/generic.rb 49 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/uri/ftp.rb 50 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/uri/http.rb 51 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/uri/https.rb 52 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/uri/ldap.rb 53 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/uri/ldaps.rb 54 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/uri/mailto.rb 55 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/uri.rb 56 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/socket.bundle 57 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/socket.rb 58 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/timeout.rb 59 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/protocol.rb 60 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/zlib.bundle 61 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/stringio.bundle 62 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/http.rb 63 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/date_core.bundle 64 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/date/format.rb 65 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/date.rb 66 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/time.rb 67 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/request.rb 68 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/cgi/core.rb 69 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/cgi/cookie.rb 70 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/cgi/util.rb 71 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/cgi.rb 72 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/site_ruby/1.9.1/rubygems/uri_formatter.rb 73 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/fcntl.bundle 74 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/x86_64-darwin12.4.0/openssl.bundle 75 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/openssl/bn.rb 76 /Users/taimoor/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/openssl/cipher.rb 77 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/Users/taimoor/railsdev/connect/vendor/bundle/gems/actionpack-4.0.0/lib/action_pack/version.rb 162 /Users/taimoor/railsdev/connect/vendor/bundle/gems/actionpack-4.0.0/lib/action_pack.rb ... ommitting some lines since it exceeded 30,000 characters [NOTE] You may have encountered a bug in the Ruby interpreter or extension libraries. Bug reports are welcome. For details: http://www.ruby-lang.org/bugreport.html Abort trap: 6
关于我做错的任何想法？ 我是OSX Mavericks，如果这有助于隔离问题。
在您正在使用的版本控制系统中进行提交，以便在需要时可以回滚。 您还应该将ruby 1.9.3更新到最新的1.9.3-484。
rvm get stable rvm upgrade 1.9.3
卸载你的json gem
gem uninstall json
它可能会警告依赖关系，这应该没问题，因为您将重新安装。 现在捆绑：
bundle install
您可能必须使用其他gem，直到在该环境中安装任何具有基于ruby版本的不同版本或依赖项的gem。
编辑
因为它不适合你，我可以在Ruby 1.9.3-p484上创建一个Rails 4.0.2应用程序并使用json（1.8.1）运行服务器就好了我会尝试这个：
为项目创建一个新目录， cd进入该目录，然后设置rvm以使用正确的ruby：
rvm use ruby-1.9.3-p484
然后为该gem集安装rails
gem install rails
现在创建一个与旧旧应用程序名称相同的新rails应用程序
rails new ....
然后将所有应用程序的文件复制到新的rails应用程序。 我想你可以覆盖一切。 不要复制Gemfile.lock文件 。 在新应用程序的目录中运行
bundle install
这应该添加你在新环境的gem集中缺少的任何gem。