When running a
brew upgrade, it upgraded
readline to version 7.0. This
broke the Rails console.
Here’s how that looked:
bundle exec rails c Running via Spring preloader in process 69075 /Users/mroach/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-126.96.36.199/lib/active_support/dependencies.rb:293:in `require': dlopen(/Users/mroach/.rbenv/versions/2.3.1/lib/ruby/2.3.0/x86_64-darwin15/readline.bundle, 9): Library not loaded: /usr/local/opt/readline/lib/libreadline.6.dylib (LoadError)
Here’s how I reverted to readline 6.3.8 to fix this:
# Uninstall this incompatible version brew uninstall readline # Go to the local clone of homebrew-core cd $(brew --prefix)/Homebrew/Library/Taps/homebrew/homebrew-core # Move to the homebrew-core revision that had 6.3.8 git checkout 35fed817726f61a9d40c8420582f6fde59eb5f14 # Re-install readline brew reinstall readline # Switch back to HEAD git checkout master # Pin readline so this can't happen again brew pin readline