When decreasing world height using a datapack in the latest snapshot the game crashes. Removing the datapack does fix this again
In previous versions, doing this correctly truncates the chunks with no crashes or other major issues (although log errors are thrown each time a chunk is loaded for the first time after the change).
This may simply be unsupported behaviour, but the inconsistency with previous versions suggests an underlying technical change - if this is intentional then that's fine but it would be nice to have clarification, and/or a warning when loading the pack
Linked issues
is duplicated by 4
MC-277476
Server crash: Exception loading chunk
Resolved
MC-279119
Reducing height of dimension resets existing chunks, rather than preserving area
Resolved
MC-279600
Worlds created in 1.20-1.21 fail to load when upgrading them to 1.21.4
Resolved
MC-280496
Using 25w10a will crash when entering a 25w09b world
Resolved
Attachments
Comments 8
Confirmed for 1.21.2-pre1, here's my world that's also affected: https://www.mediafire.com/file/4e38p1miwd1pvmi/MC-277476_-_altered_world_copy.zip/file
This needs fixing before release, or map makers are going to be severely hindered from updating their maps.
And still in RC2. If a mod/helper oor the reporter would add this version, unlike the last 2 versions I confirmed it for....
This seems to have been fixed in 1.21.4-Release Candidate 1, the world no longer seems to crash but it displays this error whenever loading into the world:
[media]This has been reported in MC-279119
Can confirm:
[media]