15w51a is the forty-seventh snapshot released for 1.9, released to fix bugs and crashes.


Commands Contents 1 Usage 1.1 Tilde notation 1.2 Target selectors 1.2.1 Target selector variables 1.2.2 Target selector arguments 1.3 Data tags 1.4 Raw JSON text 1.5 Block/item names 2 Summary of commands 3 List of commands



Frost Walker "Flame" redirects here. For the non-solid damage-dealing block, see Fire. “ How does enchanting work in Minecraft? Well, you open a magical book and pick a random spell, not quite sure knowing what it will minecraft enchantment
  • No longer frosts water blocks that do not have an air block above.
Spectator Java Edition Only Spectator mode is a game mode which allows you to fly around and observe the world without interacting with it in any way. Spectator mode can be entered by using the command Mode
  • A spectator is no longer able to open a chest where the loot has not been generated yet. They are given the message: "Unable to open. Loot not generated yet."
Status effects "Healing" redirects here. For health, see health. Contents 1 Behavior 2 Summary of effects 3 List of effects 3.1 Absorption 3.2 Bad Luck 3.3 Blindness 3.4 Fire Resistance 3.5 Glowing 3.6 Haste 3.7 Health Boost minecraft
A comparison of the glowing effect on an ender dragon before and after this snapshot.
  • Glowing Status effect now outlines players and mobs more exactly, arrows stuck in them or items held and transparencies will now be obeyed.

Command format

  • Using /gamerule to set a gamerule will now report the change: ⃢₀ₜGame rule has been updated to .⃢₀₝

World generation

  • When riding minecart, boat, pig or horse, terrain will now normally generate.


Ice Ice Transparency PC: Partial (-2 to light) PE: No Luminance No Blast resistance 2.5 Tool Renewable Yes Stackable Yes (64) Flammable No Drops None Data value dec: 79 hex: 4F bin: 1001111 Name ice See minecraft
  • Water produced by melting ice now flows.


Creepers Creeper Health points 20 () Attack strength Varies by proximity and difficulty. Maximum damage: Normal: 49 ( × 24.5) Charged: 97 ( × 48.5) Size Height: 1.7 Blocks Width: 0.6 Blocks Spawn Light level of minecraft
  • No longer drop music discs when /gamerule doMobLoot false is set.
Mob "Monster" redirects here. For the mob called "monster" in the code, see Human. Mobs are living, moving game entities. The term "mob" is short for "mobile". 1] Contents 1 Spawning 2 Behavior 3 List of minecraft AI and pathfinding
  • Has been improved.

Non-mob entities

Boats Boat Type Vehicles Durability N/A Renewable Yes Stackable No Flammable No, but drops except in lava Internal ID PC: 41 PE: 90 Network ID PC: 1 Entity ID boat Drops See Drops Health points 4 minecraft
  • Will now drop their corresponding wood planks when broken.
Ender Crystal End Crystal Type Decorations Durability N/A Renewable Yes Stackable Yes (64) Internal ID PC: 200 PE: 71 Network ID PC: 51 Entity ID ender_crystal Drops None First appearances See History Data value dec: 426 hex: 1AA bin: 110101010 minecraft
  • End crystals can no longer be placed in Adventure gamemode.


22 issues fixed
From released versions before 1.9
  • MC-3564 – Debug message “Unable to locate Sign at (x, y, z)” left inside Minecraft client.
  • MC-13046 – Certain supported characters glitch out, clearing out lines of text.
  • MC-51725 – Gamerule doMobLoot does not affect the dropping of music discs.
  • MC-69072 – /worldborder warning distance/time throws an error when used without arguments.
  • MC-73886 – Villagers don’t recognize blocked doors correctly.
  • MC-75256 – spawn-protection is also spawn randomization size.
  • MC-93614 – Bats fly from creative players.
From the 1.9 development versions
  • MC-85709 – The ender dragon is incorrectly outlined when it has the Glowing effect.
  • MC-86099 – The outline of glowing guardian’s tail is bigger than the tail itself.
  • MC-89246 – When the “glowing” effect finishes on an entity it un-renders things for one frame.
  • MC-89915 – Chunks don’t load when the player is in a minecart/on a horse/pig.
  • MC-89954 – All boat types drop oak wood planks.
  • MC-90585 – Navigating on a boat wearing Frost Walker enchantment frosts the water layer below the boat.
  • MC-92915 – Items, blocks & XP orbs appear transparent and/or gray when picked up
  • MC-93503 – Inner elytra texture doesn`t render while holding a skull.
  • MC-93532 – Holding items will slightly brighten an elytra being worn.
  • MC-93622 – Endermen remain hostile after switching gamemodes.
  • MC-93772 – Mobs follow player in creative and spectator mode.
  • MC-93844 – Transparent hat pixels on skull render opaque.
  • MC-93944 – Default resource pack is ordered topmost until closing and re-entering the resource pack dialogue.
  • MC-94010 – Wolves joining an attack stay aggressive on the player even after changing gamemode.
From the previous development version
  • MC-94295 – Ender dragon respawns on its own in pre-1.9 worlds.