With the change to loot tables, the code for having mobs drop worn armor or held items is no longer called.
Easy enough to test, just summon a mob with equipment and set the corresponding HandDropChances or ArmorDropChances to 1.0. Or put a saddle on a pig.
Comments 5
Still in 15w43b. You can also notice that when mob is picking up weapon, the HandDropItems for this weapon is set to 2.0f
Tested on egg-spawned zombie pigmans.
Seems to be fixed in 15w43c also for original swords of pigzombie (with low chance of dropping) and picked up swords (with high, probably 100% chance)
Can confirm with saddled pigs and inventory picked up by mobs. Can't confirm with horses.