启动服务器时导轨错误

Question

我刚刚开始使用rails，并且在启动服务器时出现以下错误。

$ rails s 
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/linecache19-0.5.12/lib/tracelines19.rb:12:in `require': dlopen(/usr/local/rvm/gems/ruby-1.9.3-p194/gems/linecache19-0.5.12/lib/trace_nums19.bundle, 9): Symbol not found: _ruby_current_thread (LoadError) 
Referenced from: /usr/local/rvm/gems/ruby-1.9.3-p194/gems/linecache19-0.5.12/lib/trace_nums19.bundle 
Expected in: flat namespace in /usr/local/rvm/gems/ruby-1.9.3-p194/gems/linecache19-0.5.12/lib/trace_nums19.bundle - /usr/local/rvm/gems/ruby-1.9.3-p194/gems/linecache19-0.5.12/lib/trace_nums19.bundle 
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/linecache19-0.5.12/lib/tracelines19.rb:12:in `rescue in <module:TraceLineNumbers>' 
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/linecache19-0.5.12/lib/tracelines19.rb:8:in `<module:TraceLineNumbers>' 
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/linecache19-0.5.12/lib/tracelines19.rb:6:in `<top (required)>' 
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/linecache19-0.5.12/lib/linecache19.rb:69:in `require' 
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/linecache19-0.5.12/lib/linecache19.rb:69:in `<top (required)>' 
from /usr/local/rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/runtime.rb:68:in `require' 
from /usr/local/rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/runtime.rb:68:in `block (2 levels) in require' 
from /usr/local/rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/runtime.rb:66:in `each' 
from /usr/local/rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/runtime.rb:66:in `block in require' 
from /usr/local/rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/runtime.rb:55:in `each' 
from /usr/local/rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/runtime.rb:55:in `require' 
from /usr/local/rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler.rb:119:in `require' 
from /Users/Crysfel/Sites/rails/quizzpot/config/application.rb:13:in `<top (required)>' 
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:53:in `require' 
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:53:in `block in <top (required)>' 
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:50:in `tap' 
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:50:in `<top (required)>' 
from script/rails:6:in `require' 
from script/rails:6:in `<main>' 

我使用：

的Rails 3.2.8 红宝石1.9.3p194

这里是我的config/application.rb中的文件：

require File.expand_path('../boot', __FILE__) 

    # Pick the frameworks you want: 
    require "active_record/railtie" 
    require "action_controller/railtie" 
    require "action_mailer/railtie" 
    require "active_resource/railtie" 
    require "sprockets/railtie" 
    # require "rails/test_unit/railtie" 

    if defined?(Bundler) 
     # If you precompile assets before deploying to production, use this line 
     Bundler.require(*Rails.groups(:assets => %w(development test))) 
     # If you want your assets lazily compiled in production, use this line 
     # Bundler.require(:default, :assets, Rails.env) 
    end 

    module Quizzpot 
     class Application < Rails::Application 
    # Settings in config/environments/* take precedence over those specified here. 
    # Application configuration should go into files in config/initializers 
    # -- all .rb files in that directory are automatically loaded. 

    # Custom directories with classes and modules you want to be autoloadable. 
    # config.autoload_paths += %W(#{config.root}/extras) 

    # Only load the plugins named here, in the order given (default is alphabetical). 
    # :all can be used as a placeholder for all plugins not explicitly named. 
    # config.plugins = [ :exception_notification, :ssl_requirement, :all ] 

    # Activate observers that should always be running. 
    # config.active_record.observers = :cacher, :garbage_collector, :forum_observer 

    # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone. 
    # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC. 
    # config.time_zone = 'Central Time (US & Canada)' 

    # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded. 
    # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s] 
    # config.i18n.default_locale = :de 

    # Configure the default encoding used in templates for Ruby 1.9. 
    config.encoding = "utf-8" 

    # Configure sensitive parameters which will be filtered from the log file. 
    config.filter_parameters += [:password] 

    # Use SQL instead of Active Record's schema dumper when creating the database. 
    # This is necessary if your schema can't be completely dumped by the schema dumper, 
    # like if you have constraints or database-specific column types 
    # config.active_record.schema_format = :sql 

    # Enforce whitelist mode for mass assignment. 
    # This will create an empty whitelist of attributes available for mass-assignment for all models 
    # in your app. As such, your models will need to explicitly whitelist or blacklist accessible 
    # parameters by using an attr_accessible or attr_protected declaration. 
    # config.active_record.whitelist_attributes = true 

    # Enable the asset pipeline 
    config.assets.enabled = true 

    # Version of your assets, change this if you want to expire all your assets 
    config.assets.version = '1.0' 
    end 
end 

Answer 1

堆栈跟踪显示你与linecache19宝石有问题。谷歌搜索表明，其他人也遇到了同样的问题：它似乎是该宝石和Ruby 1.9.3之间的不兼容。

是你的Gemfile中的linecache19？如果是这样，你可以删除它吗？ （你真的需要它吗？）如果它不在Gemfile中，请查看Gemfile.lock并查看它是否被列为其他宝石之一的依赖项。