cannot load such file — readline (LoadError) when running heroku create --stack cedar

Question

I\'m trying to deploy my Rails application to Heroku to test it out by following these instructions:

http://devcenter.heroku.com/articles/rails3#prerequisites

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Answer 1

Such an error usually occurs when your rvm ruby was compiled without readline extension (which happens when there weren't readline headers installed before ruby compilation). So, try the following: install libreadline-dev, then reinstall ruby:

rvm remove 1.9.3 
rvm install 1.9.3