我正在尝试启动并运行旧的Ruby on Rails项目。该项目使用Ruby 1.9.3p484和一堆宝石，包括mysql2，这些宝石在我运行bundle install时都已成功安装。但是，当我运行script/rails server（就像我说的旧版本的RoR）时，我得到以下 mysql2 错误：
/Users/ryan/.rvm/gems/ruby-1.9.3-p484@iwny/gems/bundler-1.11.2/lib/bundler/runtime.rb:81:in在块中救援（2级）在require'：尝试加载gem'mysql2'时出错。 （捆扎机:: GemRequireError）
和堆栈跟踪：
/Users/ryan/.rvm/gems/ruby-1.9.3-p484@iwny/gems/bundler-1.11.2/lib/bundler/runtime.rb:81:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'mysql2'. (Bundler::GemRequireError)
from /Users/ryan/.rvm/gems/ruby-1.9.3-p484@iwny/gems/bundler-1.11.2/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
from /Users/ryan/.rvm/gems/ruby-1.9.3-p484@iwny/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `each'
from /Users/ryan/.rvm/gems/ruby-1.9.3-p484@iwny/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `block in require'
from /Users/ryan/.rvm/gems/ruby-1.9.3-p484@iwny/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in `each'
from /Users/ryan/.rvm/gems/ruby-1.9.3-p484@iwny/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in `require'
from /Users/ryan/.rvm/gems/ruby-1.9.3-p484@iwny/gems/bundler-1.11.2/lib/bundler.rb:99:in `require'
from /Users/ryan/vagrant/source/adage/web/htdocs/iwny/config/application.rb:8:in `<top (required)>'
from /Users/ryan/.rvm/gems/ruby-1.9.3-p484@iwny/gems/railties-3.0.20/lib/rails/commands.rb:28:in `require'
from /Users/ryan/.rvm/gems/ruby-1.9.3-p484@iwny/gems/railties-3.0.20/lib/rails/commands.rb:28:in `block in <top (required)>'
from /Users/ryan/.rvm/gems/ruby-1.9.3-p484@iwny/gems/railties-3.0.20/lib/rails/commands.rb:27:in `tap'
from /Users/ryan/.rvm/gems/ruby-1.9.3-p484@iwny/gems/railties-3.0.20/lib/rails/commands.rb:27:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
就像我说的那样，bundle install工作得很好。 Gemfile包含
gem 'mysql2', '< 0.3'
以及各种软件的版本包括以下内容：
Server version: 5.5.44-37.3-log Source distribution 我不能真正搞乱太多的核心东西，因为这是一个既定的网站/回购，所以我必须使用我在这里的东西。