[MC-86082] Cannot summon an entity with a custom UUID

Hi,

I wanted to summon an entity with a custom UUID to combine with the "ownerName" in some projectiles.

But it seems that it's not possible anymore:

/scoreboard objectives add test dummy
    /scoreboard objectives setdisplay sidebar test
    /summon ArmorStand 275 56 920 {UUID:"8ed0f252-5fea-41e6-9189-75915fb00b9c"}
    /scoreboard players set @e[type=ArmorStand] test 1

And each time I have a different UUID displayed but never the one I specified.

This UUID is one that the ArmorStand once took
There's only me and this ArmorStand in this world (no other entities) and my UUID is not that one
Even with "2-2-2-2-2" as UUID the problem is the same. It worked back in some previous snapshot (in summon and in ownerName) but not anymore.

Thanks

Korko

Linked issues

relates to 1

MC-44904 Mobs Can Spawn With The Same UUID As Other Mobs In World Resolved

Comments 4

michael 2015-08-14T10:09:20Z

It was necessary for several bug fixes to remove access to the entity UUID through NBT in commands. Please use something like {Tags:["REFERENCETAG"]} instead.

Korko 2015-08-14T10:35:31Z

Ok but Tags doesn't allow to use the ownerName as you can't summon a snowball with {ownerName:@e[tag=launcher]}...

michael 2015-08-14T15:37:09Z

Ok, disregard my first comment. I checked the code and for /summon it's still possible to specify a custom UUID, but you NEED to use the UUIDMost and UUIDLeast syntax, becasue the NBT tag that was simply called UUID is not parsed anymore.

Korko 2015-08-14T17:57:32Z

Hooray, UUIDMost:6L and UUIDLeast:6L really summon an entity with UUID:0-0-6-0-6

Thanks Searge