Bot can't move in y=256 or 255

[slonkazoid]

[X] The FAQ doesn't contain a resolution to my issue

Versions

• mineflayer: ^2.23.0
• server: paper
• node: 12 LTS

Detailed description of a problem

Bot thinks that it is surrounded by blocks in y=256 or 255.

So it cannot move.

Expected behavior

Bot should move normally

Additional context

Works perfectly in other ground: https://streamable.com/ud7kgn

Can't move in y=255 or 256 https://streamable.com/myfeqy

(sorry for the item names. I didn't name them.)

[TheDudeFromCI]

I think this is related to blocks outside of the world bounds being considered undefined, and not being handled properly.

[Karang]

Not undefined, bedrock: https://github.com/PrismarineJS/mineflayer/blob/master/lib/plugins/blocks.js#L190 (just remove the line) I fixed it some time ago https://github.com/PrismarineJS/mineflayer/pull/1022 but had to revert the changes (don't remember why)

[Karang]

Ah got it, is was needed to also fix https://github.com/PrismarineJS/prismarine-chunk/blob/master/src/pc/1.13/ChunkColumn.js#L50 (for all versions), because the section is undefined (not null).

[IdanHo]

would the proper fix be to detect out of bounds y levels (< 0 || > 255) and return an air block on the mineflayer layer or the prismarine-chunk layer then?

[Karang]

In prismarine-chunk https://github.com/PrismarineJS/prismarine-chunk/pull/95 Once merged we can remove https://github.com/PrismarineJS/mineflayer/blob/master/lib/plugins/blocks.js#L190

[slonkazoid]

I guess this is done