[MC-241827] Partially generated structures from older versions can get cut off along chunk borders

The bug

Partially generated structures from older versions get cut off along chunk borders.

To reproduce

Open the attached world

[media]

.
1. Alternatively, open a world in 1.15.2 with the following seed and teleport to the coordinates:
```
Seed: -4086024126150179283
Coordinates: -2100 80 700
```
2. Close the world and open it in the newest version.
/execute in minecraft:overworld run tp @s -2167.50 46.85 702.53 -93.60 30.75.

Expected result

Partially generated structures from older versions would not get cut off along chunk borders.

Related issues

duplicates

MC-224729 Partially generated chunks are not saved in some situations

Attachments

Test.zip

Comments

migrated 2021-11-18T00:02:46Z

[media][media][media]

ampolive 2021-11-18T00:08:31Z

Might be a case of MC-185253, I don't know if it is a separate issue.
Discovered while testing MC-241308, which I have not been able to reproduce since.

migrated 2021-11-18T01:08:12Z

I don't think it is a duplicate of MC-185253, but it is at least related.

Moesh 2021-11-19T09:13:28Z

Was this world edited or pruned with MCEdit or other editing software?

ampolive 2021-11-19T11:00:05Z

No, it was generated in vanilla and was not modified.