rails generate devise:install hangs

I ran into this issue today whilst I was trying to deploy jumpstart template into my Rails 5.2.1 App

When I ran rails generate devise:install nothing happened. No errors, no output – nothing. Normally, this completes in seconds. In the end I aborted the rails generate task with a Ctrl-C. I noticed that the following output was barfed out to the screen:

generate  devise:install

/Users/felendernukeri/.rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/fileutils.rb:90: warning: already initialized constant FileUtils::VERSION
/Users/felendernukeri/.rvm/gems/ruby-2.5.1/gems/fileutils-1.1.0/lib/fileutils.rb:92: warning: previous definition of VERSION was here
/Users/felendernukeri/.rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/fileutils.rb:1188: warning: already initialized constant FileUtils::Entry_::S_IF_DOOR
/Users/felendernukeri/.rvm/gems/ruby-2.5.1/gems/fileutils-1.1.0/lib/fileutils.rb:1267: warning: previous definition of S_IF_DOOR was here
/Users/felendernukeri/.rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/fileutils.rb:1446: warning: already initialized constant FileUtils::Entry_::DIRECTORY_TERM
/Users/felendernukeri/.rvm/gems/ruby-2.5.1/gems/fileutils-1.1.0/lib/fileutils.rb:1541: warning: previous definition of DIRECTORY_TERM was here
/Users/felendernukeri/.rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/fileutils.rb:1448: warning: already initialized constant FileUtils::Entry_::SYSCASE
/Users/felendernukeri/.rvm/gems/ruby-2.5.1/gems/fileutils-1.1.0/lib/fileutils.rb:1543: warning: previous definition of SYSCASE was here
/Users/felendernukeri/.rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/fileutils.rb:1501: warning: already initialized constant FileUtils::OPT_TABLE
/Users/felendernukeri/.rvm/gems/ruby-2.5.1/gems/fileutils-1.1.0/lib/fileutils.rb:1596: warning: previous definition of OPT_TABLE was here
/Users/felendernukeri/.rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/fileutils.rb:1555: warning: already initialized constant FileUtils::LOW_METHODS
/Users/felendernukeri/.rvm/gems/ruby-2.5.1/gems/fileutils-1.1.0/lib/fileutils.rb:1650: warning: previous definition of LOW_METHODS was here
/Users/felendernukeri/.rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/fileutils.rb:1562: warning: already initialized constant FileUtils::METHODS
/Users/felendernukeri/.rvm/gems/ruby-2.5.1/gems/fileutils-1.1.0/lib/fileutils.rb:1657: warning: previous definition of METHODS was here
RAILS_ENV=development environment is not defined in config/webpacker.yml, falling back to production environment
Running via Spring preloader in process 11760

Full errors:
https://imgur.com/S5OMubu
https://imgur.com/Lu5uo26
https://imgur.com/0gpv1ey
https://imgur.com/hLckCui

I didn’t think anything of this at first, and assumed I had a dodgy install of devise, or rails or something.

So I uninstalled and reinstalled devise, warden and rails – and reran rails generate devise:install.

Nothing happened. I hit Ctrl-C, and got the same

Try running "spring stop" in the new app folder, delete the folder, and then try again. Spring will cache files like that and do weird things.

I resolved the problem by doing the following:

gem uninstall fileutils
Successfully uninstalled fileutils-1.1.0
gem update --default
Updating installed gems
Updating fileutils
Fetching: fileutils-1.1.0.gem (100%)
Successfully installed fileutils-1.1.0