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  1. Minecraft: Java Edition
  2. MC-133855

Upgrading chunks with "LightPopulated" set to false deletes them (caused by using external editor)


    • Icon: Bug Bug
    • Resolution: Invalid
    • None
    • Minecraft 1.13-pre10
    • None
    • Unconfirmed

      Resolution note

      Quote of comment by fry from a private report about this:

      The chunks that are regenerated have the flag "LightPopulated" set to false, which normally can only happen to the chunks on the border of the world, so the upgrade process drops them (since they might have not generated fully). This is a reasonable behavior, since those chunks couldn't've been modified by the player. Our guess is that you used some kind of a tool to edit the chunks; if so, please set that flag to true, and it should fix this issue for you.

      Mod note

      If your server is/was a Spigot server you will need to use CraftBukkit/Spigot to convert the world. Spigot in 1.12 didn't set the "LightPopulated" flag, so that vanilla Minecraft will reset those chunks.
      After a conversion with Spigot 1.13 the world can be opened in vanilla Minecraft again without problems.
      See also the Bukkit, CraftBukkit, Spigot & BungeeCord 1.13 release notes:

      +++ Spigot 1.12.2 worlds must be converted using CraftBukkit/Spigot and NOT Vanilla.

      When i migrated my island world from 1.12 to 1.13, i have only 1/4 island. Around is new generated world.

      1.12 world download - https://mega.nz/#F!C3g3kKwK!VjHjeZ9cHEDmWBikp6rwyg

      World location - /tp -1536 80 1536

      Images - https://imgur.com/a/KI70rz5

            Unassigned Unassigned
            MrFiliper Filip Šandera
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