Heroku rejecting push in mature application (pre-receive hook declined)

Question

I\'m getting

   FAILED: http://devcenter.heroku.com/articles/bundler

! Heroku push rejected, failed to install gems via Bundler To git@hero

Answer 1

I've just had the same problem, and the following fixed it for me:

I had a combination of gems grouped by requirement (test, development etc), and some that were used by both e.g.

group :development do
  gem "hpricot"
  gem "ruby_parser"
  gem "haml-rails", ">= 0.3.4"
end

and

gem "rspec-rails", ">= 2.9.0.rc2", :group => [:development, :test]

I deleted the single line ones, and just duplicated them in the relevant blocks (not DRY I know, but what the heck).

Did a quick Bundle, and hey presto I could push to Heroku again...