make sure pending results respond to failures

lib/flowerbox/result/pending.rb

@@ -7,6 +7,8 @@ module Flowerbox::Result
     def failure?
       false
     end
+
+    def failures; [] ; end
   end
 end
 

lib/flowerbox/server.rb

@@ -47,6 +47,7 @@ module Flowerbox
       ws.onmessage { |message|
         command, data = JSON.parse(message)
 
+        begin
           output = runner.send(command, [ data ].flatten)
 
           if command == 'load'
@@ -54,6 +55,11 @@ module Flowerbox
           else
             ws.send("ok")
           end
+        rescue => e
+          $stderr.puts e.message
+
+          exit 1
+        end
       }
     end