更新至OS X 10.10後，Gem無法正常工作Yosemite Beta

Question

更新至10.10優勝美地後，我無法讓寶石工作。

運行這個（或任何其他寶石安裝/卸載）：

sudo gem install mysql2psql 

它總是給我下面的錯誤：

/Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:159:in `synchronize': ERROR: Failed to build gem native extension. (Gem::Ext::BuildError) 

    ERROR: Failed to build gem native extension. 

    deadlock; recursive locking 

Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/mysql-2.9.1 for inspection. 
Results logged to /Library/Ruby/Gems/2.0.0/extensions/universal-darwin-14/2.0.0/mysql-2.9.1/gem_make.out 


Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/mysql-2.9.1 for inspection. 
Results logged to /Library/Ruby/Gems/2.0.0/extensions/universal-darwin-14/2.0.0/mysql-2.9.1/gem_make.out 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:159:in `build_extension' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:198:in `block in build_extensions' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:195:in `each' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:195:in `build_extensions' 
    from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:1436:in `block in build_extensions' 
    from /Library/Ruby/Site/2.0.0/rubygems/user_interaction.rb:45:in `use_ui' 
    from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:1434:in `build_extensions' 
    from /Library/Ruby/Site/2.0.0/rubygems/stub_specification.rb:60:in `build_extensions' 
    from /Library/Ruby/Site/2.0.0/rubygems/basic_specification.rb:56:in `contains_requirable_file?' 
    from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:925:in `block in find_inactive_by_path' 
    from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:924:in `each' 
    from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:924:in `find' 
    from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:924:in `find_inactive_by_path' 
    from /Library/Ruby/Site/2.0.0/rubygems.rb:185:in `try_activate' 
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:132:in `rescue in require' 
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:144:in `require' 
    from /Library/Ruby/Site/2.0.0/rubygems.rb:601:in `load_yaml' 
    from /Library/Ruby/Site/2.0.0/rubygems/config_file.rb:328:in `load_file' 
    from /Library/Ruby/Site/2.0.0/rubygems/config_file.rb:197:in `initialize' 
    from /Library/Ruby/Site/2.0.0/rubygems.rb:289:in `new' 
    from /Library/Ruby/Site/2.0.0/rubygems.rb:289:in `configuration' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:63:in `run' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/ext_conf_builder.rb:38:in `block in build' 
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/tempfile.rb:324:in `open' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/ext_conf_builder.rb:17:in `build' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:161:in `block (2 levels) in build_extension' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:160:in `chdir' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:160:in `block in build_extension' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:159:in `synchronize' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:159:in `build_extension' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:198:in `block in build_extensions' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:195:in `each' 
    from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:195:in `build_extensions' 
    from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:1436:in `block in build_extensions' 
    from /Library/Ruby/Site/2.0.0/rubygems/user_interaction.rb:45:in `use_ui' 
    from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:1434:in `build_extensions' 
    from /Library/Ruby/Site/2.0.0/rubygems/stub_specification.rb:60:in `build_extensions' 
    from /Library/Ruby/Site/2.0.0/rubygems/basic_specification.rb:56:in `contains_requirable_file?' 
    from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:925:in `block in find_inactive_by_path' 
    from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:924:in `each' 
    from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:924:in `find' 
    from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:924:in `find_inactive_by_path' 
    from /Library/Ruby/Site/2.0.0/rubygems.rb:185:in `try_activate' 
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:132:in `rescue in require' 
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:144:in `require' 
    from /Library/Ruby/Site/2.0.0/rubygems.rb:601:in `load_yaml' 
    from /Library/Ruby/Site/2.0.0/rubygems/config_file.rb:328:in `load_file' 
    from /Library/Ruby/Site/2.0.0/rubygems/config_file.rb:197:in `initialize' 
    from /Library/Ruby/Site/2.0.0/rubygems/gem_runner.rb:74:in `new' 
    from /Library/Ruby/Site/2.0.0/rubygems/gem_runner.rb:74:in `do_configuration' 
    from /Library/Ruby/Site/2.0.0/rubygems/gem_runner.rb:39:in `run' 
    from /usr/bin/gem:21:in `<main>' 

也許有人能幫助！ Xcode 6測試版安裝了包括命令行工具。

非常感謝！

Answer 1

我有同樣的問題，並通過刪除我的寶石，並重新安裝解決了這個問題：

sudo rm -rf /Library/Ruby/Gems/*; 
sudo gem update --system 

（如描述 here）