[MC-215876] Dirt can generate below y=0 from mineshafts

In the 21w07a snapshot, dirt is said to stop generating below y 0, but mineshafts still generate dirt rooms as part of their structure below y 0.

Seed: 1717221929747746810
Coords: /tp @s -612.30 -49.09 -113.43 -574.20 36.15

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This is probably WAI as it is part of the mineshaft generation

This dirt is part of the mineshaft.

The changelog was about the "patches" of dirt/granite/diorite that you can find underground. Not dirt in general.

Reopened to be reconsidered by Mojang, seeing as MC-216765 has been triaged

Can confirm in 21w11a.

Can confirm in 21w13a.

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Feature that caused this bug is removed in the latest 1.17 snapshots and release 1.17

Can confirm that this is still an issue in 1.17.

Can confirm in 1.17.1.

Caves & Cliffs 1.17.1 Datapack Preview
Seed: 63654350
Coordinates: /execute in minecraft:overworld run tp @s 3.37 -29.46 6.44 -88.55 30.29

How did this get solved?

Abandoned mineshafts don't have those dirt center rooms anymore?

@unknown, just remember that discussion regarding issues should be mentioned outside of the bug tracker.