[MC-29613] Bonus chests generate on top of water

The bug

The bonus chest generates above water despite there being solid ground with space above it around the water area.

How to reproduce

Possibly outdated

Using seed -9068686719535872623 in a swamp buffet world, the chest appears above water, despite there being plenty of land nearby.

Last checked: 1.16.2

World type: Default
Seed: 4091996699329202483

Last checked: 1.20 Release Candidate 1
World type: Default
Seed: -8450249545086940980

Linked issues

is duplicated by 14

MC-133165 Bonus chest can spawn in air Resolved

MC-151833 Bonus chest spawned in mid-air above water Resolved

MC-167051 Bonus chest spawned over water Resolved

MC-168421 Bonus Chest spawns on top of water Resolved

MC-183728 Bonus Chest Spawn over the ocean Resolved

9 more links

relates to 2

MC-610 Grass / Flowers / Snow are placed incorrectly in newly created chunks Resolved

MC-146623 Bonus chest can spawn in the air or over grass Resolved

Attachments

seed 6991637125011401927 (high chance of reproduction).png

Comments 30

Earthcomputer 2017-05-19T18:10:44Z

This could be more serious if the chest generates over a large lava lake

bemoty 2017-08-16T20:02:15Z

Can confirm for MC 1.12.1.

Yanis48 2018-05-28T12:39:41Z

Is this still an issue with the new block tag "valid_spawn"?

EDIT:

After creating 12 different worlds, appears to be fixed. On a Buffet world type with only the ocean biome, the bonus chest spawned on a non-submerged island. So I think its apparition is managed by "valid_spawn" block tag. @kumasasa

Yanis48 2018-05-29T14:29:13Z

Still fixed

shufboyardee 2018-06-09T02:58:57Z

Issue's been that after the bonus chest is placed on valid land, a lake carves itself out beneath it. It may be that in the current 1.13 generator, bonus chests are placed after lakes, which would solve the issue. Someone could check that if they were so inclined.

20 more comments

Kraif 2018-08-24T11:04:32Z

Tried to reproduce it for 1.13.1 but nothing.

carpet0928 2018-09-12T13:16:22Z

Likely still present in 1.13.1, but seed -9068686719535872623 no longer demonstrates this issue. If anyone can reproduce in the current version please provide a new seed and coordinates.

Bogdan Barbu 2019-04-04T19:50:46Z

Still an issue in 19w14a. Also, I'm not sure the seed helps because, as far as I've seen in the past, the bonus chest's location is not based on the seed. However, it shouldn't be too hard to replicate because I got this on 5 consecutive new worlds with random seeds. It's not that the chest generates above lakes in particular but it generates in floating in air without any torches around it (probably because there are no valid locations for them—however, they don't appear as entities on the ground either).

Swekob 2019-11-13T21:57:55Z

Affects 19w46a.

Now that MC-146623 is fixed, @unknown's comment is no longer valid regarding bonus chests floating in the air.

Swekob 2019-11-13T22:09:05Z

While normal worlds do have this bug, bonus chests in buffet worlds set to deep ocean is the fastest way to reproduce.

My suggestion for scenarios where bonus chests have no non-water block to generate on, generate a plank block beneath the chest and subtract one plank block that were going to be inside the bonus chest.

Swekob 2019-11-14T16:12:05Z

Affects 19w46b.

Title should be changed to "Bonus chests generate on top of water" to be more clear. The description should also change slightly.

Swekob 2019-11-22T16:20:58Z

Affects 1.15-pre1

montlikadani 2019-12-31T14:05:12Z

Confirmed in 1.15.1

Seed: 4091996699329202483

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Oliolio 2020-04-03T11:24:08Z

Confirmed in 20w14a

Seed: 2833266223617890175