title: How to solve the "[BUG] Segmentation fault"?
body: <p>I am using a Mac OS running Snow Leopard 10.6.8 and RVM 1.10.3, Ruby 1.9.3-p125, Ruby on Rails 3.2.2 and rspec-rails-2.8.1. I have properly installed and configured all gems, but when in the Terminal window I run the <code>rake spec</code> command I get the following:</p>
  
  <pre><code>$ rake spec
  /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/yard-0.7.5/lib/yard/cli/command.rb:10: [BUG] Segmentation fault
  ruby 1.9.3p125 (2012-02-16 revision 34643) [x86_64-darwin10.8.0]
  
  -- Control frame information -----------------------------------------------
  c:0045 p:0011 s:0136 b:0136 l:000135 d:000135 CLASS  /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/yard-0.7.5/lib/yard/cli/command.rb:10
  c:0044 p:0011 s:0134 b:0134 l:000133 d:000133 CLASS  /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/yard-0.7.5/lib/yard/cli/command.rb:4
  c:0043 p:0021 s:0132 b:0132 l:000131 d:000131 TOP    /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-
  1.9.3-p125/gems/yard-0.7.5/lib/yard/cli/command.rb:3
  c:0033 p:0220 s:0104 b:0104 l:0020f0 d:0020f0 TOP    /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/yard-0.7.5/lib/yard.rb:57
  c:0032 p:---- s:0101 b:0101 l:000100 d:000100 FINISH
  c:0031 p:---- s:0099 b:0099 l:000098 d:000098 CFUNC  :require
  c:0030 p:0026 s:0095 b:0095 l:000380 d:000470 BLOCK  /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/runtime.rb:68
  c:0029 p:---- s:0092 b:0092 l:000091 d:000091 FINISH
  c:0028 p:---- s:0090 b:0090 l:000089 d:000089 CFUNC  :each
  c:0027 p:0091 s:0087 b:0087 l:000380 d:000408 BLOCK  /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/runtime.rb:66
  c:0026 p:---- s:0081 b:0081 l:000080 d:000080 FINISH
  c:0025 p:---- s:0079 b:0079 l:000078 d:000078 CFUNC  :each
  c:0024 p:0046 s:0076 b:0076 l:000380 d:000380 METHOD /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/runtime.rb:55
  c:0023 p:0021 s:0072 b:0072 l:0004e0 d:0004e0 METHOD /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler.rb:118
  c:0022 p:0089 s:0068 b:0068 l:000548 d:000548 TOP    /&lt;ABSOLUT_PATH&gt;/Sites/&lt;APPLICATION_NAME&gt;/config/application.rb:7
  c:0021 p:---- s:0066 b:0066 l:000065 d:000065 FINISH
  c:0020 p:---- s:0064 b:0064 l:000063 d:000063 CFUNC  :require
  c:0019 p:0026 s:0060 b:0060 l:0005a8 d:0005a8 TOP    /&lt;ABSOLUT_PATH&gt;/Sites/&lt;APPLICATION_NAME&gt;/config/environment.rb:2
  c:0018 p:---- s:0058 b:0058 l:000057 d:000057 FINISH
  c:0017 p:---- s:0056 b:0056 l:000055 d:000055 CFUNC  :require
  c:0016 p:0058 s:0052 b:0052 l:000608 d:000608 TOP    /&lt;ABSOLUT_PATH&gt;/Sites/&lt;APPLICATION_NAME&gt;/spec/spec_helper.rb:3
  c:0015 p:---- s:0050 b:0050 l:000049 d:000049 FINISH
  c:0014 p:---- s:0048 b:0048 l:000047 d:000047 CFUNC  :require
  c:0013 p:0011 s:0044 b:0044 l:000668 d:000668 TOP    /&lt;ABSOLUT_PATH&gt;/Sites/&lt;APPLICATION_NAME&gt;/spec/controllers/users_controller_spec.rb:1
  c:0012 p:---- s:0042 b:0042 l:000041 d:000041 FINISH
  c:0011 p:---- s:0040 b:0040 l:000039 d:000039 CFUNC  :load
  c:0010 p:0025 s:0036 b:0036 l:0006c8 d:000730 BLOCK  /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/rspec-core-2.8.0/lib/rspec/core/configuration.rb:698
  c:0009 p:---- s:0033 b:0033 l:000032 d:000032 FINISH
  c:0008 p:---- s:0031 b:0031 l:000030 d:000030 CFUNC  :map
  c:0007 p:0023 s:0028 b:0028 l:0006c8 d:0006c8 METHOD /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/rspec-core-2.8.0/lib/rspec/core/configuration.rb:698
  c:0006 p:0074 s:0025 b:0025 l:0007a8 d:0007a8 METHOD /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/rspec-core-2.8.0/lib/rspec/core/command_line.rb:22
  c:0005 p:0055 s:0020 b:0020 l:000820 d:000820 METHOD /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/rspec-core-2.8.0/lib/rspec/core/runner.rb:80
  c:0004 p:0101 s:0014 b:0014 l:0008a8 d:0008a8 METHOD /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/rspec-core-2.8.0/lib/rspec/core/runner.rb:69
  c:0003 p:0021 s:0007 b:0006 l:001788 d:000908 BLOCK  /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/gems/rspec-core-2.8.0/lib/rspec/core/runner.rb:10
  c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
  c:0001 p:0000 s:0002 b:0002 l:002388 d:002388 TOP
  
  -- 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: /&lt;ABSOLUT_PATH&gt;/.rvm/gems/ruby-1.9.3-p125/bin/rspec
  
  * Loaded features:
  
      0 enumerator.so
      1 /&lt;ABSOLUT_PATH&gt;/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/x86_64-darwin10.8.0/enc/encdb.bundle
      2 /&lt;ABSOLUT_PATH&gt;/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/x86_64-darwin10.8.0/enc/trans/transdb.bundle
      3 /&lt;ABSOLUT_PATH&gt;/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/defaults.rb
      ...
  
  [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
  
  rake aborted!
  /&lt;ABSOLUT_PATH&gt;/.rvm/rubies/ruby-1.9.3-p125/bin/ruby -S rspec ./spec/controllers/users_controller_spec.rb ... failed
  </code></pre>
  
  <p><strong>How can I solve the issue?</strong></p>
  
  <p><em>Note</em>: I noted that the problem happens sometimes, <em>randomly!</em></p>
  
  <hr>
  
  <p>In my Gemfile I have:</p>
  
  <pre><code>...
  
  group :development, :test do
    gem "rspec-rails"
    gem 'webrat'
  end
  
  group :test do
    gem 'factory_girl_rails'
    gem 'cucumber-rails'
    gem 'turn', :require =&gt; false
  end
  
  ...
  </code></pre>