instance method compose_exception_message

# File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 148
      def compose_exception_message(wrapper)
        trace = wrapper.exception_trace

        message = []
        message << "  "
        if wrapper.has_cause?
          message << "#{wrapper.exception_class_name} (#{wrapper.message})"
          wrapper.wrapped_causes.each do |wrapped_cause|
            message << "Caused by: #{wrapped_cause.exception_class_name} (#{wrapped_cause.message})"
          end

          message << "\nInformation for: #{wrapper.exception_class_name} (#{wrapper.message}):"
        else
          message << "#{wrapper.exception_class_name} (#{wrapper.message}):"
        end

        message.concat(wrapper.annotated_source_code)
        message << "  "
        message.concat(trace)

        if wrapper.has_cause?
          wrapper.wrapped_causes.each do |wrapped_cause|
            message << "\nInformation for cause: #{wrapped_cause.exception_class_name} (#{wrapped_cause.message}):"
            message.concat(wrapped_cause.annotated_source_code)
            message << "  "
            message.concat(wrapped_cause.exception_trace)
          end
        end

        message
      end