[MC-241651] Mineshafts can get cut off at chunk borders

The Bug:

Mineshafts can get cut off at chunk borders.

Occasionally, mineshafts get cut off at chunk borders. However, this can not be consistently reproduced; sometimes, the generated parts don't generate at all.

Previously part of a double-issue bug; MC-214963.

Here is an example:

Version: 1.19.3

Seed: -1374521101267461444
Coordinates: /execute in minecraft:overworld run tp @s 1422.42 -30.00 222.01 -137.85 21.90

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.
Take note as to whether or not mineshafts can get cut off at chunk borders.

Observed Behavior:

Mineshafts can get cut off at chunk borders.

Expected Behavior:

Mineshafts would not be able to get cut off at chunk borders.

Attachments

Comments 4

Avoma 2021-11-18T16:46:47Z

I can confirm this issue exists in 1.18 Pre-release 4.

[media]

Here are some extra details regarding this problem.

The Bug:

Mineshafts can sometimes get cut off at chunk borders.

Steps to Reproduce:

Generate a world with the following seed and teleport to the following coordinates.

Version: 1.18 Pre-release 4
Seed: 2671478887814226195
Coordinates: /execute in minecraft:overworld run tp @s 9328.70 -39.53 -834.30 523.90 16.27

Look at the generation of the mineshaft closely.
Take note as to whether or not mineshafts can sometimes get cut off at chunk borders.

Observed Behavior:

Mineshafts can sometimes get cut off at chunk borders.

Expected Behavior:

Mineshafts would not get cut off at chunk borders.

Avoma 2021-12-30T12:03:36Z

Can confirm in 1.18.1.

Avoma 2022-08-02T09:30:31Z

Can confirm in 1.19.1.

[media]

Version: 1.19.1

Seed: -8413791146211211132
Coordinates: /execute in minecraft:overworld run tp @s 232.03 -28.26 139.33 -25.55 48.40

J Z 2024-12-22T17:19:41Z

Can confirm in 1.21.4 with the seed and coordinates in the description.