[MC-106416] Chorus fruit and Enderman can teleport to outside the world border and into powder snow

The Bug

Endermen and chorus fruit consider blocks outside of the world border, and powder snow as valid teleporting locations.

Note: This report contains endermen and chorus fruit because as of 1.11.2 they use the same method (net.minecraft.entity.EntityLivingBase.attemptTeleport(double, double, double)) to teleport.

How to reproduce

Set the center of the world border to your current position and to 10 blocks wide
```
/worldborder center ~ ~
/worldborder set 10
```
Obtain some chorus fruit and eat it until you end up outside of the world border
→ ❌ Notice how chorus fruit considers blocks outside of the world border as valid teleporting locations
Summon an enderman and make it teleport by placing some water nearby
→ ❌ Notice how endermen consider blocks outside of the world border as valid teleporting locations

Examples

Here are a few examples:

Enderman:
[media][media]
Chorus fruit:
Video:

[media]

Expected behavior

The expected behavior would be that endermen and chorus fruit consider blocks outside of the world border, and powder snow as invalid teleporting locations.

Linked issues

is duplicated by

MC-86261 Chorus Fruit can teleport you outside the world border

MC-128716 Endermen teleport out of the world border

MC-172231 Enderman teleports out of World Border

MC-237382 Enderman bypass Worldborder

relates to

MC-102836 Enderman and chorus fruit can teleport to some dangerous places

MC-214113 Endermen and Shulkers can teleport onto the Nether roof

MC-136074 Enderman can teleport onto waterlogged blocks

Attachments

Chorus fruit can teleport you outside the world border.mp4

MC-106416.mp4

Comments

[Mod]Les3awe 2016-08-21T06:49:41Z

This issue relates to MC-102836.

migrated 2019-09-07T10:39:44Z

That is a feature, not a bug. Mobs can go through the border unlike the player.

violine1101 2019-09-07T12:08:03Z

@unknown, source?

migrated 2019-10-02T11:52:06Z

Pixdo.et, enderman going outside the world may be intended, but chorus fruit teleporting you outside is definitely a bug

Avoma 2021-02-04T19:26:57Z

Can confirm in 21w05b.

Avoma 2021-09-26T09:22:21Z

I am able to confirm this behavior in 21w38a. Here are some extra details regarding this problem.

The Bug:

Endermen and chorus fruit consider blocks outside of the world border as valid teleporting locations.

Steps to Reproduce:

Set the center of the world border to your current position and to 10 blocks wide.

/worldborder center ~ ~
/worldborder set 10

Obtain some chorus fruit and eat it until you end up outside of the world border.
→ ❌ Notice how chorus fruit considers blocks outside of the world border as valid teleporting locations.
Summon an enderman and make it teleport by placing some water nearby.
→ ❌ Notice how endermen consider blocks outside of the world border as valid teleporting locations.

Expected Behavior:

The expected behavior would be that endermen and chorus fruit consider blocks outside of the world border as invalid teleporting locations.

Avoma 2022-02-16T14:29:16Z

Can confirm in 1.18.1.

Avoma 2022-03-05T11:49:40Z

Can confirm in 1.18.2.

MMK21 2022-06-01T07:40:59Z

Powder Snow is also not considered when checking for valid teleport destinations. (See MC-252243 for more information.)