ruby 版本：1.8.7
OS：Ubuntu12.04
在rails项目下执行安装gemfile的命令
bundle install --path .bundle
得到下面结果
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/bin/ruby1.9.1 extconf.rb
extconf.rb:6: stack level too deep (SystemStackError)
Gem files will remain installed in /home/username/path/.bundle/ruby/1.9.1/gems/libxml-ruby-0.8.3 for inspection.
Results logged to /home/username/path/.bundle/ruby/1.9.1/gems/libxml-ruby-0.8.3/ext/libxml/gem_make.out
An error occurred while installing libxml-ruby (0.8.3), and Bundler cannot continue.
Make sure that `gem install libxml-ruby -v '0.8.3'` succeeds before bundling.
运行
sudo gem install libxml-ruby -v '0.8.3'
却提示：
Building native extensions. This could take a while...
Successfully installed libxml-ruby-0.8.3
Installing ri documentation for libxml-ruby-0.8.3
No definition for input_callbacks_add_scheme
No definition for input_callbacks_remove_scheme
No definition for ruby_xml_node2_new_native
Enclosing class/module 'cXMLSaxParser' for module Callbacks not known
No definition for ruby_xml_html_parser_new_file
No definition for ruby_xml_html_parser_new_io
No definition for ruby_xml_html_parser_filename_get
No definition for ruby_xml_html_parser_filename_set
No definition for ruby_xml_html_parser_io_get
No definition for ruby_xml_html_parser_io_set
No definition for ruby_xml_parser_context_options_get
No definition for ruby_xml_parser_context_options_set
/usr/local/lib/ruby/1.8/rdoc/rdoc.rb:280: warning: conflicting chdir during another chdir block
/usr/local/lib/ruby/1.8/rdoc/rdoc.rb:287: warning: conflicting chdir during another chdir block
Done installing documentation for libxml-ruby after 2 seconds
1 gem installed
但Gemfile.lock没法正常生成。