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@Takkiii(瀧ヶ崎 翔)

rails consoleでLibrary not loaded: /usr/local/opt/readline/lib/libreadline.7.dylib (LoadError)ってエラーが出る件について

Posted at

まずエラー載せますね。
参考になるかもしれないのでエラーログまるごと。

YourName@YourName application_name % bundle exec rails c
Traceback (most recent call last):
    42: from bin/rails:4:in `<main>'
    41: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `require'
    40: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:291:in `load_dependency'
    39: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `block in require'
    38: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
    37: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
    36: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
    35: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
    34: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
    33: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-6.0.2.1/lib/rails/commands.rb:18:in `<top (required)>'
    32: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-6.0.2.1/lib/rails/command.rb:44:in `invoke'
    31: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-6.0.2.1/lib/rails/command.rb:70:in `find_by_namespace'
    30: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-6.0.2.1/lib/rails/command/behavior.rb:39:in `lookup'
    29: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-6.0.2.1/lib/rails/command/behavior.rb:39:in `each'
    28: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-6.0.2.1/lib/rails/command/behavior.rb:40:in `block in lookup'
    27: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-6.0.2.1/lib/rails/command/behavior.rb:40:in `each'
    26: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-6.0.2.1/lib/rails/command/behavior.rb:44:in `block (2 levels) in lookup'
    25: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `require'
    24: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:291:in `load_dependency'
    23: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `block in require'
    22: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
    21: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
    20: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
    19: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
    18: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
    17: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-6.0.2.1/lib/rails/commands/console/console_command.rb:4:in `<top (required)>'
    16: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `require'
    15: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:291:in `load_dependency'
    14: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `block in require'
    13: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
    12: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
    11: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
    10: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
     9: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
     8: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/2.5.0/irb/completion.rb:10:in `<top (required)>'
     7: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `require'
     6: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:291:in `load_dependency'
     5: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `block in require'
     4: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
     3: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
     2: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
     1: from /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
/Users/YourName/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require': dlopen(/Users/YourName/.rbenv/versions/2.5.1/lib/ruby/2.5.0/x86_64-darwin18/readline.bundle, 9): Library not loaded: /usr/local/opt/readline/lib/libreadline.7.dylib (LoadError)
  Referenced from: /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/2.5.0/x86_64-darwin18/readline.bundle
  Reason: image not found - /Users/YourName/.rbenv/versions/2.5.1/lib/ruby/2.5.0/x86_64-darwin18/readline.bundle

さて、これの解決方法について調べてみると、

  1. /usr/local/opt/readline/lib に以下のファイルを、->のようにシンボリックリンクする

    • libreadline.dylib -> libreadline.dylib
    • libhistory.dylib -> libreadline.dylib

  2. ７系のreadlineを入れて、そちらを使用するようにする

  3. rb-readlineを突っ込む

などが見受けられましたが、個人的には3が影響範囲小さくて良いなと思い、そちらを選択しました。
本当はもっとちゃんと調べたかったけど、rails consoleを使いたいだけなのに、ここに時間を取られるのもアホらしいなと思ったので雑に解決。

おわりに

brew info readlineとかやっても７系のreadline出てこなかったんですが、もうインストールできないのだろうか？

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