After upgrading Homebrew to version 1.1.0 a few programs were broken.
$ bundler exec ./bin/dev Sorry, you can't use Pry without Readline or a compatible library. Possible solutions: * Rebuild Ruby with Readline support using `--with-readline` * Use the rb-readline gem, which is a pure-Ruby port of Readline * Use the pry-coolline gem, a pure-ruby alternative to Readline bundler: failed to load command: ./bin/dev (./bin/dev) LoadError: dlopen(/Users/thefox/.rbenv/versions/2.3.1/lib/ruby/2.3.0/x86_64-darwin14/readline.bundle, 9): Library not loaded: /usr/local/opt/readline/lib/libreadline.6.dylib
rbenv is not working anymore:
$ rbenv install 2.3.1 rbenv: /Users/thefox/.rbenv/versions/2.3.1 already exists continue with installation? (y/N) y Downloading ruby-2.3.1.tar.bz2... -> https://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.1.tar.bz2 Installing ruby-2.3.1... BUILD FAILED (OS X 10.10.5 using ruby-build 20160602) Inspect or clean up the working tree at /var/folders/fb/46 Results logged to /var/folders/fb/46.log Last 10 log lines: configure: ruby library version = 2.3.0 configure: creating ./config.status config.status: creating GNUmakefile dyld: Library not loaded: /usr/local/opt/readline/lib/libreadline.6.dylib Referenced from: /usr/local/bin/awk Reason: image not found
So you cannot reinstall Ruby.
You need to uninstall all versions of readline first.
$ brew uninstall --force readline $ brew install readline
In my case
awk was affected too.
$ awk dyld: Library not loaded: /usr/local/opt/readline/lib/libreadline.6.dylib Referenced from: /usr/local/bin/awk Reason: image not found Trace/BPT trap: 5
So I needed to reinstall
gawk) as well.
$ brew uninstall --force gawk $ brew install gawk
After that I was able to reinstall Ruby version 2.3.1 using
Conclusion: You need to reinstall readline and all programs that uses readline.