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Minecraft 21w05a

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

2,027 names shipped in this version. Each result opens the wiki page for that thing.

Contents (12)
  1. What changed in 21w05a
  2. Blocks
  3. Items
  4. Particles
  5. How to make the new things
  6. Sound events
  7. New in-game text
  8. Reworded text
  9. Fixes
  10. Development cycle
  11. Browse this version
  12. Neighbouring versions

Java What changed in 21w05a

Everything below is measured by comparing the game files of 21w03a with 21w05a — not copied from patch notes.

+30Blocks
+28Items
+2Particles
+63Sound events
21w05a block and item additions

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

Blocks +30 · −16

AzaleaAzalea LeavesAzalea Leaves FlowersBig DripleafBig Dripleaf StemCave Vines BodyCave Vines HeadExposed Copper BlockExposed Cut CopperExposed Cut Copper SlabExposed Cut Copper StairsFlowering AzaleaHanging RootsMoss BlockMoss CarpetOxidized Copper BlockOxidized Cut CopperOxidized Cut Copper SlabOxidized Cut Copper StairsRooted DirtSmall DripleafSpore BlossomWaxed Exposed CopperWaxed Exposed Cut CopperWaxed Exposed Cut Copper SlabWaxed Exposed Cut Copper StairsWaxed Weathered CopperWaxed Weathered Cut CopperWaxed Weathered Cut Copper SlabWaxed Weathered Cut Copper Stairs

Removed: minecraft:lightly_weathered_copper_block, minecraft:lightly_weathered_cut_copper, minecraft:lightly_weathered_cut_copper_slab, minecraft:lightly_weathered_cut_copper_stairs, minecraft:semi_weathered_copper_block, minecraft:semi_weathered_cut_copper, minecraft:semi_weathered_cut_copper_slab, minecraft:semi_weathered_cut_copper_stairs, minecraft:waxed_lightly_weathered_copper, minecraft:waxed_lightly_weathered_cut_copper, minecraft:waxed_lightly_weathered_cut_copper_slab, minecraft:waxed_lightly_weathered_cut_copper_stairs, minecraft:waxed_semi_weathered_copper, minecraft:waxed_semi_weathered_cut_copper, minecraft:waxed_semi_weathered_cut_copper_slab, minecraft:waxed_semi_weathered_cut_copper_stairs

Items +28 · −16

AzaleaAzalea LeavesAzalea Leaves FlowersBig DripleafExposed Copper BlockExposed Cut CopperExposed Cut Copper SlabExposed Cut Copper StairsFlowering AzaleaGlow BerriesHanging RootsMoss BlockMoss CarpetOxidized Copper BlockOxidized Cut CopperOxidized Cut Copper SlabOxidized Cut Copper StairsRooted DirtSmall DripleafSpore BlossomWaxed Exposed CopperWaxed Exposed Cut CopperWaxed Exposed Cut Copper SlabWaxed Exposed Cut Copper StairsWaxed Weathered CopperWaxed Weathered Cut CopperWaxed Weathered Cut Copper SlabWaxed Weathered Cut Copper Stairs

Removed: minecraft:lightly_weathered_copper_block, minecraft:lightly_weathered_cut_copper, minecraft:lightly_weathered_cut_copper_slab, minecraft:lightly_weathered_cut_copper_stairs, minecraft:semi_weathered_copper_block, minecraft:semi_weathered_cut_copper, minecraft:semi_weathered_cut_copper_slab, minecraft:semi_weathered_cut_copper_stairs, minecraft:waxed_lightly_weathered_copper, minecraft:waxed_lightly_weathered_cut_copper, minecraft:waxed_lightly_weathered_cut_copper_slab, minecraft:waxed_lightly_weathered_cut_copper_stairs, minecraft:waxed_semi_weathered_copper, minecraft:waxed_semi_weathered_cut_copper, minecraft:waxed_semi_weathered_cut_copper_slab, minecraft:waxed_semi_weathered_cut_copper_stairs

Particles +2

Falling Spore BlossomSpore Blossom Air

How to make the new things 41

Hover a slot to see what goes in it.

ResultMade inRecipe
Exposed Cut CopperCrafting4
Exposed Cut CopperStonecutting
Exposed Cut Copper SlabCrafting6
Exposed Cut Copper SlabStonecutting
Exposed Cut Copper SlabStonecutting
Exposed Cut Copper StairsCrafting4
Exposed Cut Copper StairsStonecutting
Exposed Cut Copper StairsStonecutting
Moss CarpetCrafting3
Oxidized Cut CopperCrafting4
Oxidized Cut CopperStonecutting
Oxidized Cut Copper SlabCrafting6
Oxidized Cut Copper SlabStonecutting
Oxidized Cut Copper SlabStonecutting
Oxidized Cut Copper StairsCrafting4
Oxidized Cut Copper StairsStonecutting
Oxidized Cut Copper StairsStonecutting
Waxed Exposed CopperCrafting
Waxed Exposed Cut CopperCrafting4
Waxed Exposed Cut CopperCrafting
Waxed Exposed Cut CopperStonecutting
Waxed Exposed Cut Copper SlabCrafting6
Waxed Exposed Cut Copper SlabCrafting
Waxed Exposed Cut Copper SlabStonecutting
Waxed Exposed Cut Copper SlabStonecutting
Waxed Exposed Cut Copper StairsCrafting4
Waxed Exposed Cut Copper StairsCrafting
Waxed Exposed Cut Copper StairsStonecutting
Waxed Exposed Cut Copper StairsStonecutting
Waxed Weathered CopperCrafting
Waxed Weathered Cut CopperCrafting4
Waxed Weathered Cut CopperCrafting
Waxed Weathered Cut CopperStonecutting
Waxed Weathered Cut Copper SlabCrafting6
Waxed Weathered Cut Copper SlabCrafting
Waxed Weathered Cut Copper SlabStonecutting
Waxed Weathered Cut Copper SlabStonecutting
Waxed Weathered Cut Copper StairsCrafting4
Waxed Weathered Cut Copper StairsCrafting
Waxed Weathered Cut Copper StairsStonecutting
Waxed Weathered Cut Copper StairsStonecutting

Sound events +63

Block.Azalea.BreakBlock.Azalea.FallBlock.Azalea.HitBlock.Azalea.PlaceBlock.Azalea.StepBlock.Azalea Leaves.BreakBlock.Azalea Leaves.FallBlock.Azalea Leaves.HitBlock.Azalea Leaves.PlaceBlock.Azalea Leaves.StepBlock.Big Dripleaf.BreakBlock.Big Dripleaf.FallBlock.Big Dripleaf.HitBlock.Big Dripleaf.PlaceBlock.Big Dripleaf.StepBlock.Big Dripleaf.Tilt DownBlock.Big Dripleaf.Tilt UpBlock.Cave Vines.BreakBlock.Cave Vines.FallBlock.Cave Vines.HitBlock.Cave Vines.Pick BerriesBlock.Cave Vines.PlaceBlock.Cave Vines.StepBlock.Flowering Azalea.BreakBlock.Flowering Azalea.FallBlock.Flowering Azalea.HitBlock.Flowering Azalea.PlaceBlock.Flowering Azalea.StepBlock.Hanging Roots.BreakBlock.Hanging Roots.FallBlock.Hanging Roots.HitBlock.Hanging Roots.PlaceBlock.Hanging Roots.StepBlock.Moss.BreakBlock.Moss.FallBlock.Moss.HitBlock.Moss.PlaceBlock.Moss.StepBlock.Moss Carpet.BreakBlock.Moss Carpet.FallBlock.Moss Carpet.HitBlock.Moss Carpet.PlaceBlock.Moss Carpet.StepBlock.Rooted Dirt.BreakBlock.Rooted Dirt.FallBlock.Rooted Dirt.HitBlock.Rooted Dirt.PlaceBlock.Rooted Dirt.StepBlock.Small Dripleaf.BreakBlock.Small Dripleaf.FallBlock.Small Dripleaf.HitBlock.Small Dripleaf.PlaceBlock.Small Dripleaf.StepBlock.Spore Blossom.BreakBlock.Spore Blossom.FallBlock.Spore Blossom.HitBlock.Spore Blossom.PlaceBlock.Spore Blossom.StepBlock.Vine.BreakBlock.Vine.FallBlock.Vine.HitBlock.Vine.PlaceEntity.Skeleton.Converted To Stray

New in-game text 38

KeyText
block.minecraft.azaleaAzalea
block.minecraft.azalea_leavesAzalea Leaves
block.minecraft.azalea_leaves_flowersFlowering Azalea Leaves
block.minecraft.big_dripleafBig Dripleaf
block.minecraft.big_dripleaf_stemBig Dripleaf Stem
block.minecraft.cave_vines_bodyCave Vines
block.minecraft.cave_vines_headCave Vines
block.minecraft.exposed_copper_blockExposed Copper Block
block.minecraft.exposed_cut_copperExposed Cut Copper
block.minecraft.exposed_cut_copper_slabExposed Cut Copper Slab
block.minecraft.exposed_cut_copper_stairsExposed Cut Copper Stairs
block.minecraft.flowering_azaleaFlowering Azalea
block.minecraft.hanging_rootsHanging Roots
block.minecraft.moss_blockMoss Block
block.minecraft.moss_carpetMoss Carpet
block.minecraft.oxidized_copper_blockOxidized Copper Block
block.minecraft.oxidized_cut_copperOxidized Cut Copper
block.minecraft.oxidized_cut_copper_slabOxidized Cut Copper Slab
block.minecraft.oxidized_cut_copper_stairsOxidized Cut Copper Stairs
block.minecraft.rooted_dirtRooted Dirt
block.minecraft.small_dripleafSmall Dripleaf
block.minecraft.spore_blossomSpore Blossom
block.minecraft.waxed_exposed_copperWaxed Exposed Copper
block.minecraft.waxed_exposed_copper_blockWaxed Exposed Copper Block
block.minecraft.waxed_exposed_cut_copperWaxed Exposed Cut Copper
block.minecraft.waxed_exposed_cut_copper_slabWaxed Exposed Cut Copper Slab
block.minecraft.waxed_exposed_cut_copper_stairsWaxed Exposed Cut Copper Stairs
block.minecraft.waxed_weathered_copperWaxed Weathered Copper
block.minecraft.waxed_weathered_copper_blockWaxed Weathered Copper Block
block.minecraft.waxed_weathered_cut_copperWaxed Weathered Cut Copper
block.minecraft.waxed_weathered_cut_copper_slabWaxed Weathered Cut Copper Slab
block.minecraft.waxed_weathered_cut_copper_stairsWaxed Weathered Cut Copper Stairs
item.minecraft.glow_berriesGlow Berries
subtitles.block.big_dripleaf.tilt_downDripleaf tilts down
subtitles.block.big_dripleaf.tilt_upDripleaf tilts up
subtitles.entity.skeleton.converted_to_straySkeleton converts to Stray
tutorial.bundleInsert.descriptionRight Click to add items
tutorial.bundleInsert.titleUse a Bundle

Reworded text 1

Wording Mojang changed in this version.

KeyBeforeAfter
block.minecraft.weathered_copper_blockWeathered Copper BlocKWeathered Copper Block
Full comparison pageEvery registry, side by side

Fixes 70

Read from Mojang’s own release notes for Minecraft Snapshot 21w05a, published 2021-02-03. Every entry keeps its original bug ID.

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

Fixed Bugs in 21w05a 70

  • MC-9568 Mobs suffocate / go through blocks when growing up near a solid block
  • MC-130098 Debug world spawns player at y=2 instead at y=70 where all the blocks are
  • MC-142711 Baby turtles take damage when pushed against ceiling
  • MC-148432 Sound spam while in water and lava at the same time
  • MC-149495 Pufferfish triggers tripwire without colliding with it upon reloading the game
  • MC-152265 Starting server outputs "unable to resolve BlockEntity for ItemStack" errors
  • MC-153254 Baby zombies/piglins take damage when pushed against ceiling by bubble columns
  • MC-163673 Baby husks, piglins, zombies, zombie villagers, and zombified piglins take damage when jumping into a space with a solid block above it
  • MC-186879 Standing in fire and water spams the extinguish sound
  • MC-191714 Player is dismounted when standing on farmland while riding a horse/boat while the farmland turns to dirt, causing a desync
  • MC-198432 Pufferfish phases through blocks after reloading world
  • MC-199356 chatDelay in options.txt has a space between the colon and the value
  • MC-200906 Pufferfish hitbox incorrect when reloading world
  • MC-204801 Large amounts of copper blocks lag the server and causes the worldsave to take forever
  • MC-205079 Cauldrons don't fill with powder snow in some biomes
  • MC-205401 "Fire extinguishes" Sound repeatedly plays when a mob that burns in daylight is in powder snow
  • MC-205477 Occasional desync when trying to enter/exit a boat while the server is lagging
  • MC-205735 Baby cows can suffocate on stairs
  • MC-206113 Powder Snow causes Z-Fighting with Falling Blocks
  • MC-207258 Sculk sensors do not react to minecarts being driven
  • MC-207261 Bell ringing event is not considered a vibration
  • MC-207262 Drinking potions or milk doesn’t cause vibrations even though eating does
  • MC-207263 Inconsistency: Filling cauldrons with liquids or powder snow is not detected by sculk sensors
  • MC-207277 Sculk sensor can't detect setting a fire with fire charge
  • MC-207283 Extinguishing a campfire is not detected by sculk sensor
  • MC-207300 Blocks being placed or picked up by an enderman are not detected by sculk sensors
  • MC-207329 Sculk sensors don't properly detect eating from other mobs
  • MC-207340 Sculk sensors do not detect buckets of fish being emptied
  • MC-207358 Sculk sensors don't detect shulkers opening and closing
  • MC-207384 Flame arrows repeatedly trigger sculk sensors
  • MC-207387 Sculk sensors can sense players sneaking in water when they move, even when they're not swimming
  • MC-207391 Sculk sensors don't detect certain flying mobs
  • MC-207397 The fire extinguish sound plays every tick when the player is on fire and freezing
  • MC-207407 Villages will always generate at least on y=0
  • MC-207417 Directly breaking fire does not alert sculk sensors, but removing its supporting block correctly does
  • MC-207418 Breaking paintings/item frames/glow item frames does not alert sculk sensors, even though placing them does
  • MC-207445 Sculk sensor doesn't detect squids swimming
  • MC-207473 Sculk sensors do not detect when ghasts shoot
  • MC-207520 Sculk sensors don't react to ravager roars
  • MC-207521 Ocelots and cats can still emit vibrations while sneaking
  • MC-207592 Shooting bow with flame enchantment while sneaking triggers sculk sensor
  • MC-207600 Sculk sensor detects wrong sound for fishing rod
  • MC-207670 Sculk sensors do not detect the placement of boats and minecarts
  • MC-207671 Sculk sensors do not detect candles being placed into cakes
  • MC-207672 Sculk sensors do not detect when creepers are set off with flint and steel
  • MC-207673 Sculk sensors do not detect lighting TNT with flint and steel
  • MC-207674 Sculk sensors do not detect placing things in flower pots
  • MC-207675 Sculk sensors do not detect books being placed onto lecterns
  • MC-207677 Sculk sensors do not detect collecting water with bottles
  • MC-207678 Sculk sensors do not detect collecting honey bottles
  • MC-207679 Sculk sensors do not detect the breaking of bee nests and beehives in Creative mode
  • MC-207745 Sculk sensors do not detect when ender dragons shoot fireballs
  • MC-208193 Sculk sensors do not detect removing things from flower pots
  • MC-208194 Sculk sensors do not detect when candle cakes are eaten
  • MC-208477 Going into a dimension that has height higher than the maximum height crashes the game
  • MC-209361 Game crashes upon instantly click-replacing the block underneath a bamboo sapling with another bamboo
  • MC-209625 Baby llamas suffocate when below a solid block while standing on top of a carpet
  • MC-212117 Placing glow lichen in lava creates waterlogged glow lichen
  • MC-212141 Shulkers get rotated when upgrading to 21w03a
  • MC-212149 Shulker is sometimes mis-rotated when player teleports through a nether portal and reloading an active chunk with Shulker
  • MC-212284 Crammed enitities pushed through blocks when growing to adults
  • MC-212290 Commands "setblock" and "fill" don't work at or above height 1024 in some cases
  • MC-212291 Client can dismount vehicles independently from the server, causing a de-sync
  • MC-212331 Boats dismount you in the direction the boat is facing instead of the direction of the player
  • MC-212347 Importing custom world file height is limited to 2047 instead of 2048
  • MC-212422 Game crashes when generating a world with increased height limit
  • MC-212532 Shulkers are spawned slightly mis-rotated after a shulker was hit by another shulker's shulker bullet
  • MC-212537 Standing near a shulker slightly lifts you when they open
  • MC-212541 Shulkers are often incorrectly rotated upon generation
  • MC-213512 Copper blocks are named differently from bedrock edition

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

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Neighbouring versions

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