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e3ace39
(Get the code!)
I think this issue is also affecting Rails 6.1 on the system ruby/ruby-bundler packages. Testing on the latest Ubuntu Focal stable packages:
$ sudo gem install rails -v 6.1.1
$ rails new my-app
$ cd my-app && bundle exec rails db:setup
rails aborted!
TypeError: superclass mismatch for class Command
The workaround mentioned above involving adding "gem 'thor', '~> 0.20.3'" to the Gemfile doesn't work anymore as of Rails 6.1 because railties 6.1 now specifies thor ~> 1.0.