由于readline错误，无法执行“rails console”

Question

I cannot execute rails console due to this error:

localhost:TwitterForZombies wiz$ rails c
/Users/wiz/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/irb/completion.rb:9:in `require': dlopen(/Users/wiz/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/x86_64-darwin12.2.1/readline.bundle, 9): Library not loaded: /usr/local/opt/readline/lib/libreadline.6.2.dylib (LoadError)
  Referenced from: /Users/wiz/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/x86_64-darwin12.2.1/readline.bundle
  Reason: image not found - /Users/wiz/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/x86_64-darwin12.2.1/readline.bundle
    from /Users/wiz/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/irb/completion.rb:9:in `<top (required)>'
    from /Users/wiz/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/commands/console.rb:3:in `require'
    from /Users/wiz/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/commands/console.rb:3:in `<top (required)>'
    from /Users/wiz/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/commands.rb:38:in `require'
    from /Users/wiz/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/commands.rb:38:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

I have installed readline via homebrew. I'd like to keep using rbenv instead of rvm.

Thank you for reading my question.

Answer 1

I had the same issue recently with homebrew and libreadline.7.x.dylib / libreadline.6.x.dylib

I solved it by running:

ln -s /usr/local/opt/readline/lib/libreadline.7.0.dylib /usr/local/opt/readline/lib/libreadline.6.dylib

source: https://github.com/rails/rails/issues/26658

Answer 2

Homebrew is great, but once in a while it doesn't play nice with some of the other moving parts.

A brew update && brew upgrade brought in libreadline.7.x.dylib while automatically removing libreadline.6.x.dylib , which ruby was still relying on.

There may be more clever ways to fix the problem, but brute force worked for me:

$ rbenv uninstall 2.3.1
$ rbenv install 2.3.1
$ cd /path/to/my/app
$ bundle

The above assumes the presence of rbenv's ruby-build and, of course, bundler ; replace 2.3.1 with whatever version of ruby you are using.

Please note that similar problems can occur with different homebrew-managed libraries ( see my own answer to this, for example )

Answer 3

I'm on OSX, ruby2.3.0, rails5. Adding gem 'rb-readline' to my Gemfile fixed this problem.

Answer 4

I got the same error with Ruby 2.1.0, and rails 4.0. After searching and trying a lot, finally it work well:) Here are what I did:

rvm cleanup all
rvm autolibs enable
rvm install 2.1.0 

The other ways:

brew update
brew uninstall readline
brew install readline

The autolibs command will force RVM install all dependencies, so you don't need to worry about it.

Hope it's helpful.

Answer 5

As Sachin hinted, installing readline and then reinstalling ruby is the ideal approach - but the details are a bit different for rbenv. Given your file paths, I'm guessing you're on a Mac, so the following should help:

brew install readline ruby-build
env CONFIGURE_OPTS=--with-readline-dir=`brew --prefix readline` rbenv install 1.9.3-p286

This was taken from the ruby-build Wiki and a quick google search.

Answer 6

Using mac, El Captain version, it is possible to fix just by doing

rvm reinstall your_ruby_version

(like rvm reinstall ruby-2.3.1 )

Hope this helps, good luck!

Answer 7

taken from github user @enderahmetyurt (this is the only solution that worked for me).

Solution: Add gem 'rb-readline' to your Gemfile in development group and bundle install .

It's the easiest solution for silly "readline" errors.

Answer 8

try installing readline, and reinstall your ruby

https://rvm.io/packages/readline/