[MC-221311] Decorations can replace parts of mineshafts

The Bug:

Decorations can replace parts of mineshafts.

Just for clarification reasons, decoration blocks are blocks such as grass, moss carpet, azalea, dripleaf, cave vines, pointed dripstone etc...

Here is an example:

Version: 1.18.2

Seed: -6901966002481662265
Coordinates: /execute in minecraft:overworld run tp @s 231 -1 35 -320 37

Steps to Reproduce:

Generate a world with the seed provided above and teleport to the given coordinates.
Look closely at the generation of the mineshaft and how nearby decorations intersect it.
Take note as to whether or not decorations can replace parts of mineshafts.

Observed Behavior:

Decorations can replace parts of mineshafts.

Expected Behavior:

Decorations would not be able to replace parts of mineshafts.

Linked issues

is duplicated by 11

MC-227623 Cave vines and mineshafts colliding can make the cave vines float Resolved

MC-237459 Mineshaft Collision Resolved

MC-241195 Cave vines generate on air blocks in Mineshafts Resolved

MC-241355 Cave vines go though wood in mineshafts Resolved

MC-241678 Surface Features in Cave Biomes sometimes generate 1 block too high/low Resolved

6 more links

relates to 1

MC-221312 Decorations can occasionally replace logs that support mineshafts when generating Resolved

Attachments

MC-221311.mp4

MC-221311 - Behavior in 22w05a (Fixed).png

Comments 12

Avoma 2021-03-30T11:00:58Z

Relates to MC-221312.

user-c84db 2021-04-06T17:56:48Z

Relates to [MC-216589]

user-aa418 2021-08-16T17:48:09Z

I found an example:

Single Biome: Lush Caves
Seed: 100413440131279243
Coordinates: /execute in minecraft:overworld run tp @s 789.54 32.00 2914.78 432.00 48.90

user-f2760 2021-09-25T22:09:07Z

Just clarifying, this is not those things replacing the pillars, it's the mineshaft's logs that are placed after other generation not replacing them. (supporting blocks from structures are generally done last in generation)

ampolive 2021-10-06T11:56:20Z

Can confirm in 21w39a.

2 more comments

Robomnz 2021-11-17T02:31:41Z

1.18 pre release 1 and 2 both contain this bug

Jareth The Rad 2021-11-24T08:07:42Z

Apparently Cave Vines getting CUT OFF by a Mineshaft below is still the same bug, so I'll add screenshots of that.
Seed in those 3 pictures is -347828615443259447

Brain81505 2023-01-21T13:09:40Z

Can confirm in 23w03a
Seed: 8587948038190963789
XYZ: 3082 -42 9684
World type: Default
Image:

[media]

Ceresjanin123 2024-02-04T22:19:36Z

I cannot reproduce this in 1.20.4
Spend 30 minutes flying in a lush cave world on seed 107038380838084 and didn't find a single instance

j_p_smith 2024-02-06T07:20:45Z

I was able to reproduce this in 1.20.4.

World type: Single biome (lush caves)
Seed: -9028795212135345755
Coordinates: 1294 28 -323

[media]

Due to MC-219200, however, I haven't been able to reproduce this a second time, even at the same location.