lib/grape/error_formatter/json.rb in grape-0.11.0 vs lib/grape/error_formatter/json.rb in grape-0.12.0

@@ -3,10 +3,10 @@
     module Json
       class << self
         def call(message, backtrace, options = {}, env = nil)
           message = Grape::ErrorFormatter::Base.present(message, env)
 
-          result = message.is_a?(Hash) ? message : { error: message }
+          result = message.is_a?(String) ? { error: message } : message
           if (options[:rescue_options] || {})[:backtrace] && backtrace && !backtrace.empty?
             result = result.merge(backtrace: backtrace)
           end
           MultiJson.dump(result)
         end