The message for CarrierWave::ProcessingError used to include
- the name of the underlying image processor (RMagick, MiniMagick or
libvips) and
- the original error message produced by it.
The message is used for ActiveRecord validation, and it is often shown for
an end-user. This behavior has some downsides:
- The message may look cryptic and is confusing for end-users. A typical
end-user has no idea what is RMagick, for example.
- The information the message carries may be valuable for an adversary.
Especially, the image processor may not be careful enough to mask
sensitive information in an error message it produces. e.g. MiniMagick
may include stderr of ImageMagick, which may contain file paths and
reveal underlying ImageMagick configurations, in an error message.
This change solves the problems by simply removing those information.
You may still retrieve the original error message with
CarrierWave::ProcessingError#cause for debugging or programatic error
handling.
7af7db3636