IRB 未加载库 libreadline

Question

试图进入 irb 但突然开始收到此错误。尝试重新安装 brew readline 并重新链接，但没有成功。有什么建议吗？

/Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require': dlopen(/Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/x86_64-darwin17/readline.bundle, 9): Library not loaded: /usr/local/opt/readline/lib/libreadline.7.dylib (LoadError)
  Referenced from: /Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/x86_64-darwin17/readline.bundle
  Reason: image not found - /Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/x86_64-darwin17/readline.bundle
    from /Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/irb/ext/save-history.rb:12:in `<top (required)>'
    from /Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/irb/extend-command.rb:243:in `save_history='
    from /Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/irb/context.rb:92:in `initialize'
    from /Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/irb.rb:412:in `new'
    from /Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/irb.rb:412:in `initialize'
    from /Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/irb.rb:383:in `new'
    from /Users/asahmed/.rbenv/versions/2.4.2/lib/ruby/2.4.0/irb.rb:383:in `start'
    from /Users/asahmed/.rbenv/versions/2.4.2/bin/irb:11:in `<main>'

Answer 1

您可能已经升级了替换 readline 库的内容，现在有必要重建您的 Ruby。当你运行 brew clean 时，这种事情很少发生在 Homebrew 上，它会删除依赖项的过时版本，而没有意识到你的 Ruby 构建依赖于它。这是因为 Rbenv 无法与 Homebrew 沟通它仍然需要那个库。

这通常很容易解决。尝试：

rbenv install 2.4.2

您可能还想花时间更新到最新版本，即今天的 2.5.3。

IRB 未加载库 libreadline

IRB not loading library libreadline

ruby

irb

readline