railsのサーバー立ち上げでundefined method `formatter' for nil:NilClass (NoMethodError)エラーが直らない

Question

前提・実現したいこと

現在、Railsで簡単なポストアプリを作っています。Redisでのランキングを実装しようと思ったのですが、うまくいかずサーバー再起動をしようとしたところ、サーバーも立ち上がらなくなってしまいました。

Redisの実装時に新しく作成したファイルは全て削除したのですが、それでもエラーがなおりません。

発生している問題・エラーメッセージ

=> Booting Puma
=> Rails 5.2.3 application starting in development
=> Run rails server -h for more startup options
Exiting
Traceback (most recent call last):
19: from bin/rails:4:in <main>' 18: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in require'
17: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in load_dependency' 16: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in block in require'
15: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in require' 14: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in require_with_bootsnap_lfi'
13: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in register' 12: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in block in require_with_bootsnap_lfi'
11: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in require' 10: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands.rb:18:in <top (required)>'
9: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/command.rb:46:in invoke' 8: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/command/base.rb:65:in perform'
7: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/thor-0.20.3/lib/thor.rb:387:in dispatch' 6: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/thor-0.20.3/lib/thor/invocation.rb:126:in invoke_command'
5: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/thor-0.20.3/lib/thor/command.rb:27:in run' 4: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:142:in perform'
3: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:142:in tap' 2: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:147:in block in perform'
1: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:51:in start' /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:92:in log_to_stdout': undefined method formatter' for nil:NilClass (NoMethodError) mb:blog_app fumiyakinoshita$ rails s => Booting Puma => Rails 5.2.3 application starting in development => Run rails server -hfor more startup options Exiting Traceback (most recent call last): 19: from bin/rails:4:in<main>'
18: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in require' 17: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in load_dependency'
16: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in block in require' 15: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in require'
14: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in require_with_bootsnap_lfi' 13: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in register'
12: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in block in require_with_bootsnap_lfi' 11: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in require'
10: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands.rb:18:in <top (required)>' 9: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/command.rb:46:in invoke'
8: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/command/base.rb:65:in perform' 7: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/thor-0.20.3/lib/thor.rb:387:in dispatch'
6: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/thor-0.20.3/lib/thor/invocation.rb:126:in invoke_command' 5: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/thor-0.20.3/lib/thor/command.rb:27:in run'
4: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:142:in perform' 3: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:142:in tap'
2: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:147:in block in perform' 1: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:51:in start'
/Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:92:in log_to_stdout': undefined method formatter' for nil:NilClass (NoMethodError)
mb:blog_app fumiyakinoshita$ rails s
=> Booting Puma
=> Rails 5.2.3 application starting in development
=> Run rails server -h for more startup options
Exiting
Traceback (most recent call last):
19: from bin/rails:4:in <main>' 18: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in require'
17: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in load_dependency' 16: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in block in require'
15: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in require' 14: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in require_with_bootsnap_lfi'
13: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in register' 12: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in block in require_with_bootsnap_lfi'
11: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in require' 10: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands.rb:18:in <top (required)>'
9: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/command.rb:46:in invoke' 8: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/command/base.rb:65:in perform'
7: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/thor-0.20.3/lib/thor.rb:387:in dispatch' 6: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/thor-0.20.3/lib/thor/invocation.rb:126:in invoke_command'
5: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/thor-0.20.3/lib/thor/command.rb:27:in run' 4: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:142:in perform'
3: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:142:in tap' 2: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:147:in block in perform'
1: from /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:51:in start' /Users/fumiyakinoshita/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:92:in log_to_stdout': undefined method `formatter' for nil:NilClass (NoMethodError)

Answer 1

結局、該当エラーを解決する有力な情報を見つけることはできず、アプリを作り直しました。

Answer 2

最終的にエラーを修正する有力な情報を見つけることもできず、アプリ全体を作り直すことになりました。

Answer 3

なんとなくですがbootsnapが怪しい気がするので
tmp/cache内のbootsnap-load-path-cacheおよびbootsnap-compile-cacheを消してみてはいかがでしょうか？

Comments

[退会済みユーザー]

ご回答ありがとうございます！

二つとも一旦ディレクトリの外側に出してみたのですがサーバー起動の実行とともにbootsnap-load-path-cacheが復元され、同じエラーが発生してしまいます…。