Last use of an anvil duplicates the item if the player's inventory was full

The bug

The last use of an anvil duplicates the item inside if the player's inventory is full.

A video of this issue can be seen here: https://youtu.be/oSdwwxBgWco

Steps to reproduce

1. Fill your inventory with stone and a single sword
2. Put the sword in the anvil's first slot
3. Put some stone into the remaining slot in your inventory
4. Rename the sword until the anvil breaks
   -> Two swords are dropped onto the ground.