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Minecraft 21w10a

Weekly work-in-progress build. Things break and get removed again. Full source data for this version is extracted and browsable below.

2,087 names shipped in this version. Each result opens the wiki page for that thing.

Contents (11)
  1. What changed in 21w10a
  2. Blocks
  3. Items
  4. Sound events
  5. How to make the new things
  6. Block states changed
  7. New in-game text
  8. Fixes
  9. Development cycle
  10. Browse this version
  11. Neighbouring versions

Java What changed in 21w10a

Everything below is measured by comparing the game files of 21w08b with 21w10a — not copied from patch notes.

+6Blocks
+6Items
+5Sound events
21w10a block and item additions

6 new blocks and items. Hover a slot for the name; click to open its page.

Blocks +6

Cracked Deepslate BricksCracked Deepslate TilesDeepslate Coal OreDeepslate Copper OreDeepslate Emerald OreInfested Deepslate

Items +6

Cracked Deepslate BricksCracked Deepslate TilesDeepslate Coal OreDeepslate Copper OreDeepslate Emerald OreInfested Deepslate

Sound events +5

Entity.Glow Item Frame.Add ItemEntity.Glow Item Frame.BreakEntity.Glow Item Frame.PlaceEntity.Glow Item Frame.Remove ItemEntity.Glow Item Frame.Rotate Item

How to make the new things 2

Hover a slot to see what goes in it.

ResultMade inRecipe
Cracked Deepslate BricksSmeltingSmelting10.0s · 0.1 XP
Cracked Deepslate TilesSmeltingSmelting10.0s · 0.1 XP

Block states changed

BlockAddedRemoved
Acacia Sign—lit = true false
Acacia Wall Sign—lit = true false
Birch Sign—lit = true false
Birch Wall Sign—lit = true false
Crimson Sign—lit = true false
Crimson Wall Sign—lit = true false
Dark Oak Sign—lit = true false
Dark Oak Wall Sign—lit = true false
Deepslateaxis = x y z—
Jungle Sign—lit = true false
Jungle Wall Sign—lit = true false
Oak Sign—lit = true false
Oak Wall Sign—lit = true false
Spruce Sign—lit = true false
Spruce Wall Sign—lit = true false
Warped Sign—lit = true false
Warped Wall Sign—lit = true false

New in-game text 14

KeyText
argument.pos.outofboundsThat position is outside the allowed boundaries.
biome.minecraft.lush_cavesLush Caves
block.minecraft.cracked_deepslate_bricksCracked Deepslate Bricks
block.minecraft.cracked_deepslate_tilesCracked Deepslate Tiles
block.minecraft.deepslate_coal_oreDeepslate Coal Ore
block.minecraft.deepslate_copper_oreDeepslate Copper Ore
block.minecraft.deepslate_emerald_oreDeepslate Emerald Ore
block.minecraft.infested_deepslateInfested Deepslate
commands.give.failed.toomanyitemsCan't give more than %s of %s
subtitles.entity.glow_item_frame.add_itemGlow Item Frame fills
subtitles.entity.glow_item_frame.breakGlow Item Frame breaks
subtitles.entity.glow_item_frame.placeGlow Item Frame placed
subtitles.entity.glow_item_frame.remove_itemGlow Item Frame empties
subtitles.entity.glow_item_frame.rotate_itemGlow Item Frame clicks
Full comparison pageEvery registry, side by side

Fixes 33

Read from Mojang’s own release notes for Minecraft Snapshot 21w10a, published 2021-03-10. Every entry keeps its original bug ID.

33 issues fixed, read from Mojang’s own patch notes. Each entry keeps its original bug ID.

Bugs fixed in 21w10a 33

  • MC-29318 Client misses inventory updates while player is manipulating items causes invisible items
  • MC-84121 Shape of glow effect is based on mob's base layer
  • MC-87019 Only visible slots are updated clientside when you are inside an inventory
  • MC-154094 Lectern running /clear turns items into ghost items
  • MC-175964 Setblock command run by book in lectern to clear inventory run in command block causes ghost items
  • MC-201316 The /give command can create so many items that the game will freeze
  • MC-207818 Placing a sign from the offhand closes the sign UI immediately
  • MC-208301 /clear does not properly affect the item on the mouse pointer after crafting it
  • MC-210408 /spawnpoint allows players to set their spawnpoint to out-of-bounds coordinates, which crashes the game when trying to respawn
  • MC-211666 Guardians attack invisible axolotls
  • MC-212127 Normal ink sac and glow ink sac are not grouped in the creative inventory
  • MC-212144 Subtitles refer to Glow Item Frame as "Item Frame"
  • MC-212168 Ctrl + Pick Block doesn't copy block state "lit"
  • MC-212236 Cannot visually critical-hit a glow squid (No sound/particles
  • MC-212314 Glow squid remains dark even if there is a light source block next to it
  • MC-212325 Glow Squid entity data (potion effects, custom name, ...) does not get saved
  • MC-214629 FOV decreases when underwater regardless of FOV Effects accessibility setting
  • MC-214781 Lava does not generate at the very bottom of noise caves
  • MC-214784 Fossils can generate floating in caves
  • MC-214836 Water caves cause land to be excessively flooded
  • MC-214844 Bedrock can be exposed to the air at the very bottom of the new caves
  • MC-214970 Phantoms continously make too much flapping sounds
  • MC-215194 Structure blocks do not work below y=0
  • MC-215838 There is currently no way to craft deepslate tiles and deepslate bricks
  • MC-215850 Deepslate Tile Wall comes before Deepslate Brick Wall but Deepslate Bricks come before Deepslate Tiles in creative inventory
  • MC-215939 Emerald ore spawns in lower frequencies than it should above y=100
  • MC-216136 Polished deepslate slab isn't grouped with the other deepslate slabs in creative inventory
  • MC-216363 Crash upon replacing soul sand or magma with the other under a tall bubble column using /setblock
  • MC-216735 Stone Lapis Ore generating in Deepslate
  • MC-216736 Lava lakes generate exposed in caves
  • MC-216765 Coal ore can generate below Y=0 when attached to a fossil
  • MC-216817 Inconsistency: Cobbled deepslate cannot be smelted back into deepslate
  • MC-218139 Spectator vision bug

Development cycle

This build was part of the run-up to 1.17. Everything tested here landed in that release.

Minecraft 1.17The release this one led to

Browse this version

BlocksEvery blockItemsEvery itemRecipesEvery recipeTagsEvery tag

Neighbouring versions

← 21w08b (previous)21w11a (next) →