SystemStackError: stack level too deep

[mbajur]

I'm trying to generate few versions using my carrierwave uploader (rails 4.0.3, carrierwave 2.2.2) but all i can see is an exception SystemStackError: stack level too deep. My code looks like that:

keyframe_uploader.rb

class KeyframeUploader < CarrierWave::Uploader::Base

  # ...

  # Keyframe thumbnail sizes
  version :small do
    process resize_to_fill: [180, 180], if: :square?
    process resize_to_fill: [320, 180], if: :not_square?
  end

  version :medium do
    process resize_to_fill: [460, 460], if: :square?
    process resize_to_fill: [640, 460], if: :not_square?
  end

  version :large do
    process resize_to_fill: [720, 720], if: :square?
    process resize_to_fill: [1280, 720], if: :not_square?
  end


  private

    # Checks if image is a square
    def square? file
      img = Magick::Image.read(file.path)
      img[0].columns == img[0].rows
    end

    # Oposite to #square?
    def not_square? file
      !square? file
    end

end

keyframe.rb

class Keyframe < ActiveRecord::Base
  belongs_to :video

  mount_uploader :file, KeyframeUploader
end

Stack trace

SystemStackError: stack level too deep
from /usr/local/rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/irb/workspace.rb:86

Have you any idea what can be wrong i here? Original question: http://stackoverflow.com/questions/22206350/stack-level-too-deep-when-using-carrierwave-versions-with-sidekiq

Thanks in advance!

[mshibuya]

Dup of #1330.

[mbajur]

Yes, that's it! Sorry, google didn't found that thread.
Thank you.