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Minecraft 21w39a

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

2,111 names shipped in this version. Each result opens the wiki page for that thing.

Contents (6)
  1. What changed in 21w39a
  2. New in-game text
  3. Fixes
  4. Development cycle
  5. Browse this version
  6. Neighbouring versions

Java What changed in 21w39a

Everything below is measured by comparing the game files of 21w38a with 21w39a — not copied from patch notes.

New in-game text 9

KeyText
advancements.adventure.fall_from_world_height.descriptionFree fall from the top of the world (build limit) to the bottom of the world and survive
advancements.adventure.fall_from_world_height.titleCaves & Cliffs
advancements.adventure.trade_at_world_height.descriptionTrade with a villager at the build height limit
advancements.adventure.trade_at_world_height.titleStar Trader
advancements.husbandry.play_jukebox_in_meadows.descriptionMake the Meadows come alive with the sound of music from a jukebox
advancements.husbandry.play_jukebox_in_meadows.titleSound of Music
advancements.nether.ride_strider_in_overworld_lava.descriptionTake a Strider for a loooong ride on a lava lake in the Overworld
advancements.nether.ride_strider_in_overworld_lava.titleFeels like home
options.gamma.defaultDefault

Fixes 10

Read from Mojang’s own release notes for Minecraft Snapshot 21w39a, published 2021-09-29. Every entry keeps its original bug ID.

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

Fixed bugs in 21w39a 10

  • MC-116359 Status effects aren't displayed in inventory when recipe book is open
  • MC-149822 Bottom border on status effect displays in the inventory is missing
  • MC-193348 Status effect bars shift the player's inventory in creative mode
  • MC-196723 Potion effects obtained in creative mode while in inventory do not show up until reopening inventory
  • MC-214894 Bamboo generates in caves under jungles
  • MC-214959 Sugar cane generated in cave
  • MC-218167 Chatting causes lag to occur
  • MC-236755 "Feature Placement" Crash / java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0
  • MC-236903 Naturally generated cave vines have an age between 17-25
  • MC-237505 Certain Biome Builder debug values do not change

Development cycle

This build was part of the run-up to 1.18. Everything tested here landed in that release.

Browse this version