需要'ruby-debug'LoadError：找不到符號

Question

我已經破壞了我的ruby配置，我不知道如何解決它。下面是一個IRB會議：

>> require 'ruby-debug' 
LoadError: dlsym(0x101a272d0, Init_ruby_debug): symbol not found - /opt/local/lib/ruby/gems/1.8/gems/ruby-debug-base-0.10.3/lib/ruby_debug.bundle 
     from /opt/local/lib/ruby/gems/1.8/gems/ruby-debug-base-0.10.3/lib/ruby_debug.bundle 
     from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' 
     from /opt/local/lib/ruby/gems/1.8/gems/ruby-debug-base-0.10.3/lib/ruby-debug-base.rb:1 
     from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' 
     from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' 
     from /opt/local/lib/ruby/gems/1.8/gems/ruby-debug-0.10.3/cli/ruby-debug.rb:5 
     from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require' 
     from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require' 
     from (irb):1 

這裏是我的紅寶石版本：

ruby 1.8.7 (2010-06-23 patchlevel 299) [i686-darwin10] 

我不知道如何去診斷和修復此。有什麼建議麼？我應該提供哪些其他信息？

重新安裝寶石沒有解決它：

$ sudo gem install ruby-debug 
Password: 
Successfully installed ruby-debug-0.10.3 
1 gem installed 
Installing ri documentation for ruby-debug-0.10.3... 
Installing RDoc documentation for ruby-debug-0.10.3... 

Answer 1

通過rvm重新安裝1.8.7爲我解決了這個問題。

Answer 2

也許它缺少一些依賴.so文件？我會用ldd -l在linux中確定這個，不知道mac。