pry-warning出错：已经初始化的常量DEFAULT_HOOKS的前一个定义就在这里
我整年都在终端上使用过pry而没有任何问题。 但是从昨晚开始，每当我在终端中输入pry时，它都不会打开，而是给我一个很长的错误记录。 我尝试了几件事，花了很多时间搜索，但我迷路了，不知道接下来该做什么。 我不明白为什么它给了我一些具有不同错误的ruby文件的行号，因为它通常在不与文件相关的情况下工作。 日志有点长，但错误会重复出现。 我把一切都放在重要的事情上。 我非常感谢一些指导。
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Sylvies-MacBook-Air:~ sylviecottrell$ pry /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:14: warning: already initialized constant Pry::DEFAULT_HOOKS /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:14: warning: previous definition of DEFAULT_HOOKS was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:20: warning: already initialized constant Pry::DEFAULT_PRINT /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:20: warning: previous definition of DEFAULT_PRINT was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:29: warning: already initialized constant Pry::SIMPLE_PRINT /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:29: warning: previous definition of SIMPLE_PRINT was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:38: warning: already initialized constant Pry::CLIPPED_PRINT /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:38: warning: previous definition of CLIPPED_PRINT was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:43: warning: already initialized constant Pry::DEFAULT_EXCEPTION_HANDLER /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:43: warning: previous definition of DEFAULT_EXCEPTION_HANDLER was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:52: warning: already initialized constant Pry::DEFAULT_PROMPT_NAME /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:52: warning: previous definition of DEFAULT_PROMPT_NAME was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:55: warning: already initialized constant Pry::DEFAULT_PROMPT /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:55: warning: previous definition of DEFAULT_PROMPT was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:65: warning: already initialized constant Pry::DEFAULT_PROMPT_SAFE_OBJECTS /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:65: warning: previous definition of DEFAULT_PROMPT_SAFE_OBJECTS was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:68: warning: already initialized constant Pry::SIMPLE_PROMPT /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:68: warning: previous definition of SIMPLE_PROMPT was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:70: warning: already initialized constant Pry::NO_PROMPT /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:70: warning: previous definition of NO_PROMPT was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:72: warning: already initialized constant Pry::SHELL_PROMPT /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:72: warning: previous definition of SHELL_PROMPT was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:79: warning: already initialized constant Pry::NAV_PROMPT /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:79: warning: previous definition of NAV_PROMPT was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:94: warning: already initialized constant Pry::DEFAULT_CONTROL_D_HANDLER /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:94: warning: previous definition of DEFAULT_CONTROL_D_HANDLER was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:109: warning: already initialized constant Pry::DEFAULT_SYSTEM /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:109: warning: previous definition of DEFAULT_SYSTEM was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:117: warning: already initialized constant Pry::INITIAL_PWD /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:117: warning: previous definition of INITIAL_PWD was here /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry/cli.rb:6: warning: already initialized constant Pry::CLI::NoOptionsError /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry/cli.rb:6: warning: previous definition of NoOptionsError was here /usr/local/rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/specification.rb:1998:in `raise_if_conflicts': Unable to activate pry-byebug-1.3.2, because pry-0.10.0 conflicts with pry (~> 0.9.12) (Gem::LoadError) from /usr/local/rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/specification.rb:1235:in `activate' from /usr/local/rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems.rb:194:in `rescue in try_activate' from /usr/local/rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems.rb:191:in `try_activate' from /usr/local/rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:132:in `rescue in require' from /usr/local/rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:144:in `require' from /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-byebug-1.3.2/lib/pry-byebug/cli.rb:1:in `' from /usr/local/rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /usr/local/rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry/plugins.rb:38:in `load_cli_options' from /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry/cli.rb:40:in `block in add_plugin_options' from /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry/cli.rb:39:in `each' from /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry/cli.rb:39:in `add_plugin_options' from /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry/cli.rb:107:in `' from /usr/local/rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /usr/local/rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/lib/pry.rb:150:in `' from /usr/local/rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /usr/local/rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/bin/pry:12:in `rescue in ' from /usr/local/rvm/gems/ruby-2.0.0-p353/gems/pry-0.10.0/bin/pry:8:in `' from /usr/local/rvm/gems/ruby-2.0.0-p353/bin/pry:23:in `load' from /usr/local/rvm/gems/ruby-2.0.0-p353/bin/pry:23:in `' from /usr/local/rvm/gems/ruby-2.0.0-p353/bin/ruby_executable_hooks:15:in `eval' from /usr/local/rvm/gems/ruby-2.0.0-p353/bin/ruby_executable_hooks:15:in `' Sylvies-MacBook-Air:~ sylviec Pry最近从版本9.12升级到版本10，似乎更新创建了与bye-bug或pry-nav不兼容……两者中的一个。 我已经通过恢复到Pry版本9.12来解决这个问题。 您可以通过键入…来完成此操作
gem uninstall pry
它会问你要卸载哪个版本，你要卸载版本’10。 如果它没有问你并完全卸载Pry，你可以马上回来……
gem install pry -v 0.9.12
希望这可以帮助。