$ rails generate migration add_password_digest_to_users password_digest:string
Have to add password_digest to user but rails generate comand doesn't work. It just pretending to work but seems like it will lasts forever. No errors or backtrace were returned, just new line.
It is spring problem. This problem appears due to interrupting $ rails generate
command.
To solve it you should stop all spring processes:
$ spring stop
And then:
$ rails generate
You can find more details here https://github.com/rails/rails/issues/13381