[MC-90842] Sweep attack knocks back marker armor stands

The bug

You can knock back armor stands with a sword. See

[media]

.
This could be maybe considered as works as intended for regular armor stands, but definitely not so for armor stands whose Marker-tag is set to true; those shouldn't be affected at all by sweep attacks or anything at all, except commands, as they're used by mapmakers who partially also still have to rely on Marker-true-Armor stands.

How to reproduce

Give yourself an armor stand with Marker set to true, e.g. with:

/give @p minecraft:armor_stand{EntityTag:{CustomNameVisible:1b,Marker:1b,CustomName:"{\"text\":\"Marker 1\"}"}} 1

Place a couple of those armor stands close to each other.
Spawn an entity with a spawn egg (Pigmen work well) right in front of or also inbetween those Marker-true-Armor stands, notice the armor stands get knock-backed as well.

:info: With the above test setup, this doesn't seem to be reproducible while you're flying (hovering) or swimming.

Linked issues

is duplicated by 6

MC-87633 third* sword speciall atack bug Resolved

MC-99310 Move armorstands with sword knockbacks Resolved

MC-99520 Sword sweeping attack pushing invisible armor stands Resolved

MC-100027 Armor stand sweep attack Resolved

MC-104805 Moving Armor Stands Resolved

1 more links

relates to 2

MC-91050 Armor stands can have potion effects Resolved

MC-116724 Minecart can move armor stands Resolved

Attachments

bug.mp4

Comments 22

ghotion 2016-06-27T00:16:55Z

This happens even when the stand is tagged Marker:1 which is a big problem for custom maps

TheAfroOfDoom 2017-04-07T04:44:11Z

Confirmed to affect 17w14a and 17w13b.

wobst.michael 2017-04-21T14:01:59Z

@unknown ticket is yours now.

Meri Diana 2017-04-21T14:19:28Z

@unknown Thank you very much! 🙂

Panda4994 2018-06-27T18:57:44Z

Confirmed for 1.13pre4.

12 more comments

Panda4994 2018-07-04T18:14:30Z

Confirmed for 1.13-pre6.

Panda4994 2018-07-13T10:51:34Z

Confirmed for 1.13-pre7.

Kraif 2018-07-13T12:42:13Z

Confirmed for 1.13-pre8.

Kraif 2018-07-17T09:39:19Z

Confirmed for 1.13-pre9.

Kraif 2018-07-18T10:38:53Z

Confirmed for 1.13-pre10.

Kraif 2018-07-18T20:54:54Z

Confirmed for 1.13.

Kraif 2018-07-25T15:48:58Z

Confirmed for 18w30a.

Kraif 2018-07-26T20:47:07Z

Confirmed for 18w30b.

Kraif 2018-08-01T16:12:51Z

Confirmed for 18w31a.

Kraif 2018-08-08T14:35:17Z

Confirmed for 18w32a.

CreeperMagnet_ 2018-08-13T13:24:21Z

Just wondering, @unknown, what was the fix for this? No knockback on any armor stands, or no knockback just for marker stands? (That, and can you take a look at a similar issue with marker armor stands, MC-107529?)

Meri Diana 2018-08-13T13:54:36Z

It'd be beneficial for mapmakers if they could have both options. I'm uncertain whether the majority of Survival players would be fine when regular armor stands can be knocked back. Personally, I don't see it as a major issue for Survival, but definitely so for Marker-true armor stands/mapmakers. I'm also curious how Mojang decided that, but we'll see next snapshot I guess, if Mr. Letellier can't reply.

As for MC-107529, I asked two Java Devs a while back about a fix for it, but it doesn't seem to be that easy. A fix would be definitely great though for mapmakers.

rockenroll4life (Josh Letellier) 2018-08-13T17:31:53Z

The fix for this was to have marker armor stands ignored when a swipe attack is made, as they normally will ignore attacks against them anyways.

rockenroll4life (Josh Letellier) 2018-08-13T17:33:33Z

As for MC-107529, I can make a note to look into it when I get the opportunity.

Meri Diana 2018-08-13T18:02:23Z

@unknown Awesome, thank you very much, for both 🙂

CreeperMagnet_ 2018-08-14T14:05:32Z

Thanks! It'd be awesome to have MC-107529 fixed. 🙂

Meri Diana 2018-12-03T12:35:19Z

Can't reproduce in 18w48b with the previous/described method for Marker-true armor stands.

Anybody else?