1. Do

   /stats entity @p set SuccessCount Success Info 

2. Perform this command:

   /scoreboard objectives add Info dummy
   

3. Perform this command:

   /scoreboard objectives setdisplay sidebar Info
   

4. Then do this (this is necessary as there is another bug in 14w28b)

   /scoreboard players set Success Info 0
   

5. Now throw some items on the ground and perform the following command until you see a 1 for the SuccessCount instead of the item count

   /execute @e ~ ~ ~ summon item ~ ~ ~ {Item:{id:"minecraft:wooden_sword",Count:1b}}
   

You shouldn't do this in your normal world, please create a testworld therefore