Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
cfd18bd0 SPIGOT-6436: Add Player#stopAllSounds
CraftBukkit Changes:
b58f4299 SPIGOT-6436: Add Player#stopAllSounds
eb191612 SPIGOT-6783: Items do not appear in custom anvil inventories
376edf4f SPIGOT-6779: Fix LivingEntity#attack for Player entities
747a73ec SPIGOT-6772: Use entity mailbox and re-schedule entities if they get unloaded
