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  1. Minecraft: Java Edition
  2. MC-123369

Trying to recreate world from future version shows no warning and can crash


    • Icon: Bug Bug
    • Resolution: Fixed
    • Minecraft 1.13-pre7
    • Minecraft 17w50a, Minecraft 1.13-pre1, Minecraft 1.13-pre2
    • Confirmed

      The bug

      Trying to recreate a 1.13 world in 1.12 causes crashes and unexpected behavior. Expected would be that exceptions are caught and that a warning is displayed, similar to the one which appears when opening a world created in a future version.

      This report is completely valid because it does not require any game downgrading.

      Related to MC-123218?

      How to reproduce

      1. Create a world in 17w50a or a newer version
      2. Start the launcher in 1.12.2 release, re-create the world that you just created in a future version
        → Your game will crash.

      3. Start the launcher in 1.12.2, notice that, although you just crashed, the game did re-create that world for you.
      4. Enter the re-created world.
        → Your game will crash.

      Note: The crash as described seems to occur with Void worlds.
      I don't get the exact crash outcome if I test it with other premade customized worlds.

      Note the "Block being updated" referring to "tile.cocoa".

            ProfMobius ProfMobius (Thomas Guimbretiere)
            LapisDemon Meri Diana
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            2 Start watching this issue