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  1. Minecraft: Java Edition
  2. MC-125377

Structures from old worlds don't regenerate if opened with 1.13 standalone client/server


    • Icon: Bug Bug
    • Resolution: Fixed
    • Minecraft 18w21a
    • Minecraft 18w07a, Minecraft 18w07c, Minecraft 18w09a, Minecraft 18w10c, Minecraft 18w10d, Minecraft 18w11a, Minecraft 18w15a, Minecraft 18w20a, Minecraft 18w20c
    • Confirmed

      The bug

      Information about previous structures (generated in the world) saved in data/*.dat files seem not to load when a 1.12.2 and below world is opened with 1.13 (tested on client and server).

      How to reproduce

      1. Run 1.12.2 client, create a new world, seed 2791111690993685248
      2. Teleport to about 5256.0 65.0 -248.0
      3. Observe guardians frolicking in the autumn mist
      4. Close 1.12.2
      5. Open 1.13 and enter the world
      6. Fly up to Y190 to let the existing hostiles despawn
      7. Descend to Y60
      8. Observer no more guardians to spawn
      9. Confirm the observation typing /kill @e[type=minecraft:guardian]

      The ability to store previously generated structures, even if the newer world generation/format had different opinion about it, allowed for players with stubborn personalities to continue playing in their old and dingy worlds even in the newest and shiniest of Minecraft versions.

        1. 2018-02-14_21.11.34.png
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        2. 2018-02-14_21.17.06.png
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        3. nbt ocean monuments.PNG
          nbt ocean monuments.PNG
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        4. region refernces 1.PNG
          region refernces 1.PNG
          120 kB
        5. region starts 1.PNG
          region starts 1.PNG
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            ProfMobius ProfMobius (Thomas Guimbretiere)
            gnembon [Mojang] Gnembon
            74 Vote for this issue
            38 Start watching this issue