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  1. Minecraft: Java Edition
  2. MC-88097

Snow blocks receive (useless) random updates and can get destroyed when there is a light glitch



    • Icon: Bug Bug
    • Resolution: Fixed
    • Minecraft 18w43a
    • Minecraft 1.8.8, Minecraft 15w36b, Minecraft 15w36c, Minecraft 15w36d, Minecraft 15w37a, Minecraft 15w38a, Minecraft 15w38b, Minecraft 15w39b, Minecraft 15w39c, Minecraft 15w46a, Minecraft 15w47a, Minecraft 15w47b, Minecraft 15w47c, Minecraft 1.8.9, Minecraft 1.9 Pre-Release 2, Minecraft 1.9 Pre-Release 3, Minecraft 1.9 Pre-Release 4, Minecraft 1.9, Minecraft 1.9.1 Pre-Release 1, Minecraft 1.9.1 Pre-Release 2, Minecraft 1.9.1 Pre-Release 3, Minecraft 1.9.1, Minecraft 1.9.2, Minecraft 16w14a, Minecraft 16w15a, Minecraft 16w15b, Minecraft 1.9.3 Pre-Release 1, Minecraft 1.9.3 Pre-Release 2, Minecraft 1.9.3 Pre-Release 3, Minecraft 1.9.3, Minecraft 1.9.4, Minecraft 16w20a, Minecraft 16w21a, Minecraft 16w21b, Minecraft 1.10 Pre-Release 1, Minecraft 1.10 Pre-Release 2, Minecraft 1.10, Minecraft 1.10.2, Minecraft 16w43a, Minecraft 16w44a, Minecraft 1.11 Pre-Release 1, Minecraft 1.11, Minecraft 1.11.2, Minecraft 1.12, Minecraft 1.12.1 Pre-Release 1, Minecraft 1.12.1, Minecraft 1.12.2, Minecraft 18w02a, Minecraft 18w20b, Minecraft 1.13-pre1, Minecraft 1.13-pre2, Minecraft 1.13-pre3, Minecraft 1.13-pre4, Minecraft 1.13-pre6, Minecraft 1.13-pre7, Minecraft 1.13-pre8, Minecraft 1.13, Minecraft 1.13.1
    • None
    • Confirmed


      The bug

      I always was under the impression that snow blocks (other than snow layers) are not intended to melt. However, recently I managed to get some to melt when trying to move a giant flying machine.
      I would expect snow blocks to not randomly disappear, but instead snow blocks pop out as items under certain conditions.

      How to reproduce

      1. Create a new super flat world and don't move while executing these commands
      2. Make sure you are on render distance 16
      3. /gamemode spectator
      4. /tp ~1024 ~ ~
      5. /fill ~ ~-1 ~ ~3 ~-1 ~15 minecraft:glowstone
      6. /fill ~ ~ ~ ~ ~ ~15 minecraft:piston[facing=east]
      7. /fill ~1 ~ ~ ~1 ~ ~15 minecraft:snow_block
      8. /tp ~-256 ~ ~
      9. /fill ~255 ~ ~ ~255 ~ ~15 minecraft:redstone_block
      10. /tp ~256 ~ ~
      11. /gamemode creative
      12. You may move now and see snow blocks disappear. (/gamerule randomTickSpeed 100, to speed it up)

      Video demonstrating the issue: https://youtu.be/ZkI3uU7hoBA?t=1m38s

      What's going on?

      So apparently snow blocks have the same part of code to them that makes snow layers melt. It never comes to play though because it checks for the light level inside the block (which is always 0, unless you cause a light glitch).
      It is likely that at some point snow blocks where actually intended to melt but didn't due to the light level.
      But please don't make them melt now. I'm someone (and not the only one) who builds a lot with snow. So all the old builds would melt if snow would ever melt.
      So my request is to remove this part of code and take snow blocks of the list of tickable blocks (as that currently doesn't do anything anyway).




            boq [Mojang] Bartosz Bok
            panda4994 [Mojang] Panda
            61 Vote for this issue
            17 Start watching this issue