Thanks to khasse for bringing this up
… taken care of when RVM is loaded in scripts/rvm
…alling gems. To install, use: rvm install ree --patch zlib-gc-fix Or, rvm install 1.8.7 --patch zlib-gc-fix Fix for zlib / bundler issues found by @tmm1, Original patch for Ruby 1.9 written by Yusuke Endoh. See ruby/ruby@1887f60 for more details of the original patch.