[MC-93306] Blocks that occupy the same space as players don't attempt to push you off edges

The Bug

If a block falls on top of you, and it pushes you away, it will not push you completely out of the block when sneaking. This has a small effect on normal gameplay, but a very large effect on multiplayer servers.

Steps to Reproduce

Build the setup as shown in the attachment below. setup.png
Stand on top of the diamond block and begin sneaking.
Break the stone block that's supporting the sand, and once the sand lands on top of you, wait for it to stop attempting to push you out of the way.

Observed Behavior

Blocks that occupy the same space as players don't attempt to push you off edges whilst sneaking.

Expected Behavior

Blocks that occupy the same space as players would push you off edges whilst sneaking.

Linked issues

is duplicated by 1

MC-196569 Block hitbox pushing doesn't work while sneaking Resolved

relates to 1

MC-103943 Magma Block not taking damage on edge of block Resolved

Attachments

MC-93306.mp4

Comments 24

CubeTheThird 2015-11-25T06:06:51Z

Could you clarify how this has an impact on multiplayer? As far as I can tell this works as intended.

Enoch Fox 2015-11-25T18:59:40Z

Based on how Blocks disappear and Reappear in Multiplayer Protected Areas, if you break a block, jump into the slot, and the block Reappears, you will have be able to stay inside that little area and you can reach higher areas by scaling up walls.
This allows for easy exploits on a lot of servers that can't have adventure mode on at the time.
Let me know if you need more info.

SunCat 2015-11-25T20:00:17Z

Plugin servers aren't supported. ("Protected Areas" are made with plugins)

[Mod] redstonehelper 2015-11-25T20:05:41Z

This happens with regular falling sand too.

CubeTheThird 2015-11-25T20:06:57Z

You can make a protected area with Spawn Protection, in vanilla minecraft.

14 more comments

Enoch Fox 2015-11-26T02:29:45Z

@CubeTheThird

I'm not sure, but can it be in more than one place at once? Like 2 Trading Spots 500 blocks apart?
I've played on some servers that have to punish if they see this happen, as they can't really prevent it.

user-f2760 2016-01-31T19:43:36Z

there is no need to comment when you can update the affected versions yourself

MalbaCato 2016-12-27T00:00:30Z

@unknown No, the Spawn Protection area is a sphere centred at the world-spawn, but it doesn't matter, because the bug still exists in vanilla.

Kraif 2018-08-27T16:05:33Z

Confirmed for 1.13.1.

Enoch Fox 2020-07-16T03:31:36Z

This bug may be related to MC-1133 as it thinks you aren't inside the block but rather "on" air instead. This standing on the edge of a block causing weird effects is likely related to this bug.

Avoma 2020-11-26T18:37:55Z

Can confirm in 20w48a.

Avoma 2021-01-12T09:35:25Z

Can confirm in 20w51a.

Avoma 2021-01-24T11:58:08Z

Can confirm in 21w03a.

Avoma 2021-02-06T17:40:59Z

Can confirm in 21w05b.

Avoma 2021-02-16T15:43:36Z

Can confirm in 21w06a. Video attached.

Avoma 2021-02-19T15:46:25Z

Can confirm in 21w07a.

Avoma 2021-05-02T14:58:21Z

Can confirm in 21w17a.

Avoma 2021-06-28T14:10:53Z

Can confirm in 1.17.

Avoma 2021-10-08T15:05:58Z

Can confirm this behavior in 21w40a. Here are some extra details regarding this problem.

The Bug:

Blocks that occupy the same space as players don't attempt to push you off edges whilst sneaking.

Steps to Reproduce:

Build the setup as shown in the attachment below.

[media]

Stand on top of the diamond block and begin sneaking.
Break the stone block that's supporting the sand, and once the sand lands on top of you, wait for it to stop attempting to push you out of the way.

Observed Behavior:

Blocks that occupy the same space as players don't attempt to push you off edges whilst sneaking.

Expected Behavior:

Blocks that occupy the same space as players would push you off edges whilst sneaking.

Avoma 2021-12-22T10:36:08Z

Can confirm in 1.18.1.

Avoma 2022-03-05T18:21:17Z

Can confirm in 1.18.2.

Avoma 2022-06-08T10:27:57Z

Can confirm in 1.19.

Avoma 2022-08-19T14:23:08Z

Can confirm in 1.19.2.

MCVillagerHa 2024-05-12T03:50:36Z

Can Confirm in 1.20.6 And its lower version