Put the summary of the bug you're having here
What I expected to happen was...:
Placing two damaged items (i.e. pickaxes) of the same type onto a crafting grid should allow you to craft another item of the same type with less damage.
What actually happened was...:
No product appeared in the crafting output slot even though both items in the crafting grid were damaged and of the same type.
Steps to Reproduce:
1. Take 2 stone pickaxes with durability approximately 40%.
2. Place them in the player's crafting grid
This has been changed, WAI (MC-140549).