開発環境
VS Code
Rails 5.2.3
ruby 2.5.1
$ bundle exec rails c
#エラー文
Running via Spring preloader in process 62552
色々調べてみた
qiita.com
Gemfile
gem 'rb-readline'
$ bundle install
$ rails c
Running via Spring preloader in process 63491
Loading development environment (Rails 5.2.3)
[1] pry(main)>
#成功