ruby installation is missing psych please install libyaml and reinstall your ruby

1. cd.rvm/src

2. sudo rm -rf yaml*

3. cd〜

4. rvm pkg install libyaml

5. brew install libyaml

6. brew link libyaml

7. brewlink--force openssl

转自:https://stackoverflow.com/questions/15738883/please-install-libyaml-and-reinstall-your-ruby

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