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  1. Minecraft: Java Edition
  2. MC-207077

Crash on loading pre-1.13 world with noteblock + note NBT in inventory


    • Icon: Bug Bug
    • Resolution: Fixed
    • 1.19.1 Pre-release 6
    • 1.16.4, 21w03a, 1.16.5, 1.17, 1.18.1
    • Confirmed
    • Crash
    • Very Important

      Introduction: Worlds created before 1.13 store the note information of a note block as NBT, that means (in Minecraft up to 1.12.2) any note block could be CTRL/CMD-picked and retain the note information when placed. Pre-1.13 worlds opened in 1.13 up to 1.15.2 will load with the inventory cleared if the player has a note block with attached NBT. Starting from 1.16, loading those worlds causes the game to crash.

      Steps to reproduce:
      1. Open a pre-1.13 Minecraft installation. Create a world
      2. Place a noteblock
      3. CTRL/CMD-Pick the note block. Keep it in the inventory
      4. Save the world. Close Minecraft
      5. Open a 1.16 to 1.16.4 Minecraft installation
      6. Load the previous world

      Observed result:
      Minecraft crashes with the following error:
      java.lang.IllegalArgumentException: Unknown type minecraft:noteblock in akn$$Lambda$476/1476061457

      Expected result:
      The world loads with the player inventory cleared

      Additional notes:
      Opening a pre-1.13 world in 1.13 up to 1.16.4, which has a chest containing a note block with note NBT, causes the game to regenerate the chunk in which the chest was placed. Considering the added warning before loading pre-1.13 worlds, and the fact the game somewhat gracefully fails while still properly rendering the other chunks, the chunk-corruption issue doesn't seem to be of higher priority.

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