thrown error picks message over to_s

thrown_error.message_over_to_s.txt

# message is shown over to_s (not checked for inspect)
# when an error is raised

class DefaultError < StandardError
  def message
    "default-message"
  end
end

class SameMessageError < DefaultError
end

class SpecificError < DefaultError
  alias :message :to_s
end

f = SameMessageError.new "specific-message"
# raise f #default-message is shown and NOT specific-message

f = SpecificError.new "specific-message"
raise f #specific-message is shown this time and NOT default-message