MC-270603

Crash updating world: ClassCastException: RegularImmutableList cannot be cast to class com.mojang.datafixers.util.Pair

Attached is a world created freshly in 1.8.9 that crashes my game when attempting to open it in the prerelease. I've attached the crash report, but don't have much more information.

Status:Fixed

Reporter:[Mod] tryashtar

Assignee:[Mojang] Bartosz Bok

Created:2024-04-10, 09:23 PM

Updated:2024-04-12, 01:35 PM

Resolved:2024-04-12, 01:35 PM

Votes:2

Watchers:1

Confirmation Status:Confirmed

Mojang Priority:Very Important

Area:Platform

Category:Crash, Datafixer

Labels:

Affects Versions:1.20.5 Pre-Release 1

Fix Versions:1.20.5 Pre-Release 2