Java Edition 12w42a

{
 "title": "Minecraft 12w42a",
 "images": [
 "12w42a Banner.png",
 "Java Edition 12w42a.png"
 ],
 "rows": [
 {
 "field": "''(link to Java Edition article, displayed as Java Edition)''",
 "label": "(link to Edition article, displayed as Edition)"
 },
 {
 "field": "October 17, 2012",
 "label": "Release date"
 },
 {
 "field": "(link to Snapshot article, displayed as Snapshot)",
 "label": "(link to Version types article, displayed as Type)"
 },
 {
 "field": "(link to Java Edition 1.4.2 article, displayed as 1.4.2)",
 "label": "Snapshot for"
 },
 {
 "field": "[https://vault.omniarchive.uk/archive/java/client-release/1.4/pre/12w42a.jar Client] ([https://meta.celestia.sh/versions/v1/12w42a.json .json]) <br />[https://vault.omniarchive.uk/archive/java/server-release/1.4/pre/12w42a.jar Server] ([https://vault.omniarchive.uk/archive/java/server-release/1.4/pre/12w42a.exe .exe]\n(link to Category:Versions using legacy download site article, displayed as Category:Versions using legacy download site))",
 "label": "(link to Tutorial:Installing a version#Manual version installation article, displayed as Downloads)"
 },
 {
 "field": "46",
 "label": "(link to Protocol version article, displayed as Protocol version)"
 },
 {
 "field": "<span class=\"plainlinks\">[https://en.wikipedia.org/wiki/Java_version_history#Java_SE_5 Java SE 5]</span>",
 "label": "<span style=\"white-space: normal;\">Minimum Java version</span>"
 }
 ],
 "invimages": [],
 "footer": "<table style=\"margin: auto; word-break: break-word;\">\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\" >[[Java Edition 1.3.2|<span style=\"margin-right:-0.35em\">◄</span>◄  1.3.2]]</td>\n<td style=\"padding: 0.4em\">'''[[Java Edition 1.4.2|1.4.2]]'''</td>\n<td style=\"padding: 0.4em\" >[[Java Edition 1.4.4| 1.4.4 <span style=\"margin-right:-0.35em\">►</span>►]]</td>\n</tr>\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\">\n[[Java Edition 12w41b|◄  12w41b]]\n</td>\n<td style=\"padding: 0.4em\">''' 12w42a'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 12w42b| 12w42b ►]]\n</td>\n</tr>\n</table>"
}

12w42a is the fourteenth snapshot for Java Edition 1.4.2, released on October 17, 2012.^[1]

Changes

[edit | edit source]

Blocks

[edit | edit source]

Anvils

New crafting recipe, now costs 31 iron ingots instead of 55.
The player can repair items (tools and armor) using their source material.
- To get a tool or piece of armor to its maximum durability when it is nearly broken, one must use four of its source material (planks, cobblestone, iron, gold or diamonds).
- However, hoes are not able to be repaired.
Reduced experience level cost.

Redstone repeaters

When powering either side of a repeater directly with another repeater, it locks the current state of the other repeater until the signal to the powering repeater is turned off.
- If a repeater that is on is locked, it stays on.
- If a repeater that is off is locked, it cannot output a signal.
When locked, the repeater's second torch is no longer be visible and a bar textured similarly to bedrock appears.

Mobs

[edit | edit source]

Bats

Can no longer trample crops, activate pressure plates or tripwire.

General

[edit | edit source]

Language

Updated language file.

Servers

IPs can now be individually hidden.

Controls

Added the ability to use numbers to move items from or to the hotbar in an inventory GUI.

Fixes

[edit | edit source]

9 bugs fixed

Fixed very damaged anvils dropping from at least 6 blocks becoming a glitched entity that cannot be removed until the map is reloaded.
Fixed digging straight down glitching the player into blocks again.
Fixed PvP-disabled servers still allowing players to set other players on fire using Fire Aspect enchanted swords.
Fixed dropping from low heights doing damage on certain occasions.
Fixed dropping an anvil on an end crystal crashing the game.
Fixed the game sometimes crashing when using  +  to show durability on items and then moving the mouse over a non-blank map.
Fixed the game crashing when maximizing the game while in the anvil UI.
Fixed a stack overflow error when dispensers attempted to place water or lava into a solid block.
Fixed the crafting table and cauldron that spawn in swamp huts spawning at the top of the hut.

References

[edit | edit source]

↑ https://web.archive.org/web/20121019034945/http://www.mojang.com/2012/10/minecraft-snapshot-12w42a/

Navigation

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Minecraft: Java Edition versions

👁 EnvSprite chunk.png: Sprite image for chunk in Minecraft
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👁 Image
Indev (2009–2010)

👁 LegacyBlockSprite mossy-cobblestone-je1-be1.png: Sprite image for mossy-cobblestone-je1-be1 in Minecraft 0.31	👁 ItemSprite quiver.png: Sprite image for quiver in Minecraft December 2009	👁 EntitySprite rana.png: Sprite image for rana in Minecraft 23-0040^† (dev) 👁 Image 23-1459 31-1856^† 31-2004^† 31-2013^† 31-2033^† 👁 Image 31-2147^† 31-2255
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	👁 ItemSprite wheat-pre-texture-update.png: Sprite image for wheat-pre-texture-update in Minecraft February 2010	01-0025 01-0038^† 01-2227 02*** 04-1541^† 04-2027^† 04-2153^† 05-1558^† 05-2241^† 06-1437^†
👁 ItemSprite wooden-hoe-pre-texture-update.png: Sprite image for wooden-hoe-pre-texture-update in Minecraft Minecraft Indev		👁 Image 06-2034^† 06-2103 07-1057^† 07-1101 07-1647^† 07-1703 11-2327^† 11-2333^† 11-2340^† 👁 Image 12-1210 12-1622 13 14 18-0011^† 18-0016 👁 Image 19 👁 Image 23

👁 Image
Infdev (2010)

👁 LegacyBlockSprite bricks-je1.png: Sprite image for bricks-je1 in Minecraft
Minecraft Infdev

👁 EnvSprite brick-pyramid.png: Sprite image for brick-pyramid in Minecraft
Phase 1

👁 EnvSprite oak-tree.png: Sprite image for oak-tree in Minecraft
Phase 2

👁 LegacyBlockSprite spawner-je1.png: Sprite image for spawner-je1 in Minecraft
Phase 3

👁 ItemSprite minecart-pre-texture-update.png: Sprite image for minecart-pre-texture-update in Minecraft SF1	618 624 625-0922
👁 LegacyBlockSprite spawner-je1.png: Sprite image for spawner-je1 in Minecraft SF2	625-1917 627
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👁 Image
Alpha (2010)

👁 ItemSprite redstone-dust-pre-texture-update.png: Sprite image for redstone-dust-pre-texture-update in Minecraft
v1.0
(Guide)

👁 LegacyBlockSprite redstone-ore-je1-be1.png: Sprite image for redstone-ore-je1-be1 in Minecraft SF3	v1.0.1^† _01 v1.0.2^† _01 _02 v1.0.3
👁 LegacyBlockSprite ice-je1-be1.png: Sprite image for ice-je1-be1 in Minecraft SF4	v1.0.4 v1.0.5* _01
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👁 LegacyBlockSprite bookshelf-je1-be1.png: Sprite image for bookshelf-je1-be1 in Minecraft SF6	v1.0.11 v1.0.12 v1.0.13 _01^‡
👁 ItemSprite egg-pre-texture-update.png: Sprite image for egg-pre-texture-update in Minecraft SF7	v1.0.14* v1.0.15 v1.0.16 _01 02
👁 BlockSprite oak-fence.png: Sprite image for oak-fence in Minecraft SF8	v1.0.17^† _01^† 02 03 04

👁 ItemSprite compass-revision-1.png: Sprite image for compass-revision-1 in Minecraft
v1.1
(Guide)

👁 ItemSprite compass-revision-1.png: Sprite image for compass-revision-1 in Minecraft SF9	v1.1.0**
👁 ItemSprite fishing-rod-pre-texture-update.png: Sprite image for fishing-rod-pre-texture-update in Minecraft SS1	v1.1.1 v1.1.2 _01

👁 EnvSprite nether-portal.png: Sprite image for nether-portal in Minecraft
Halloween Update
(Guide)

v1.2.0*	preview

👁 EntitySprite old-player.png: Sprite image for old-player in Minecraft
Server

👁 Image
Beta (2010–2011)

👁 Old Mojang Cape (sprite).png: Sprite image for Old Mojang Cape (sprite).png in Minecraft
1.0
(Guide)

👁 BlockSprite oak-leaves-revision-1.png: Sprite image for oak-leaves-revision-1 in Minecraft
1.1
(Guide)

👁 ItemSprite cake-pre-texture-update.png: Sprite image for cake-pre-texture-update in Minecraft
1.2
(Guide)

👁 ItemSprite redstone-repeater.png: Sprite image for redstone-repeater in Minecraft
1.3
(Guide)

1.3**
1.3_01
- Demo

👁 EntitySprite wolf-pre-texture-update.png: Sprite image for wolf-pre-texture-update in Minecraft
1.4
(Guide)

1.4* (dev)
1.4_01

👁 EntitySprite charged-creeper.png: Sprite image for charged-creeper in Minecraft
1.5
(Guide)

1.5 (dev)
1.5_01
1.5_02

👁 ItemSprite map-pre-texture-update.png: Sprite image for map-pre-texture-update in Minecraft
1.6
(Guide)

1.6	preview Test Build 3

👁 LegacyBlockSprite piston-side-je1-be1.png: Sprite image for piston-side-je1-be1 in Minecraft
1.7
(Guide)

1.7	preview

👁 🍗
Adventure Update: Part I
(Guide)

1.8	PAX Prime preview pre* pre2*

1.8.1

👁 Image
Full Release (1.0–1.9) (2011–2016)

👁 EntitySprite ender-dragon.png: Sprite image for ender-dragon in Minecraft
Adventure Update: Part II
(Guide)

1.0.0^‡	pre pre2 Beta 2 pre3* pre4 pre5 pre6 RC1 RC2

1.0.1

👁 ItemSprite spawn-egg.png: Sprite image for spawn-egg in Minecraft
1.1
(Guide)

1.1	11w47a 11w48a 11w49a 11w50a 12w01a

👁 EntitySprite ocelot-pre-texture-update.png: Sprite image for ocelot-pre-texture-update in Minecraft
1.2.1
(Guide)

1.2.1	12w03a 12w04a 12w05a* 12w05b 12w06a 12w07a 12w07b 12w08a 1.2

1.2.2
1.2.3
1.2.4
1.2.5

👁 ItemSprite emerald-pre-texture-update.png: Sprite image for emerald-pre-texture-update in Minecraft
1.3.1
(Guide)

1.3.1	12w15a 12w16a 12w17a 12w18a 12w19a 12w21a 12w21b 12w22a 12w23a 12w23b 12w24a 12w25a 12w26a 12w27a 12w30a 12w30b 12w30c 12w30d 12w30e 1.3

1.3.2

👁 EntitySprite wither-pre-texture-update.png: Sprite image for wither-pre-texture-update in Minecraft
Pretty Scary Update
(Guide)

1.4.2	12w32a 12w34a 12w34b 12w36a 12w37a 12w38a 12w38b 12w39a 12w39b 12w40a 12w40b 12w41a 12w41b 12w42b 1.4 1.4.1*
1.4.4	1.4.3
1.4.5	pre
1.4.6	12w49a 12w50a 12w50b pre*

1.4.7

👁 LegacyBlockSprite block-of-redstone-je1-be1.png: Sprite image for block-of-redstone-je1-be1 in Minecraft
Redstone Update
(Guide)

1.5	13w01a 13w01b 13w02a* 13w02b 13w03a** 13w04a* 13w05a* 13w05b 13w06a* 13w07a 13w09a 13w09b 13w09c 13w10a 13w10b pre
1.5.1	13w11a 13w12~* pre
1.5.2	pre

👁 EntitySprite horse-revision-1.png: Sprite image for horse-revision-1 in Minecraft
Horse Update
(Guide)

1.6.1	13w16a* 13w16b 13w17a 13w18a 13w18b 13w18c 13w19a 13w21a 13w21b 13w22a* 13w23a 13w23b* 13w24a 13w24b 13w25a 13w25b 13w25c 13w26a 1.6*
1.6.2*	pre**
1.6.4	1.6.3*

👁 LegacyBlockSprite peony-top-je1-be1.png: Sprite image for peony-top-je1-be1 in Minecraft
The Update that
Changed the World
(Guide)

1.7.2	13w36a* 13w36b** 13w37a 13w37b 13w38a 13w38b 13w38c* 13w39a 13w39b 13w41a 13w41b* 13w42a 13w42b 13w43a 1.7* 1.7.1
1.7.4	13w47a 13w47b 13w47c 13w47d 13w47e 13w48a 13w48b 13w49a 1.7.3 pre

1.7.5
- -wip

1.7.6	pre1 pre2

1.7.10	pre1 pre2* pre3 pre4

👁 EntitySprite guardian-pre-texture-update.png: Sprite image for guardian-pre-texture-update in Minecraft
Bountiful Update
(Guide)

1.8	14w02a 14w02b 14w02c 14w03a 14w03b 14w04a* 14w04b* 14w05a 14w05b 14w06a 14w06b 14w07a 14w08a 14w10a 14w10b 14w10c* 14w11a 14w11b* 14w17a 14w18a 14w18b 14w19a 14w20a 14w20b 14w21a 14w21b 14w25a 14w25b 14w26a 14w26b 14w26c 14w27a 14w27b* 14w28a 14w28b 14w29a 14w29b 14w30a 14w30b 14w30c 14w31a 14w32a 14w32b 14w32c 14w32d 14w33a 14w33b 14w33c 14w34a 14w34b 14w34c* 14w34d pre1 pre2 pre3
1.8.1	pre1 pre2 pre3 pre4 pre5
1.8.2	pre1 pre2 pre3 pre4 pre5 pre6 pre7

1.8.3
1.8.4
1.8.5
1.8.6
1.8.7
1.8.8
1.8.9

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Combat Update
(Guide)

1.9

1.9.1

1.9.2

1.9.3	16w14a 16w15a 16w15b pre1 pre2 pre3

1.9.4

👁 Image
Full Release (1.10–1.19) (2016–2023)

👁 EntitySprite polar-bear.png: Sprite image for polar-bear in Minecraft
Frostburn Update
(Guide)

1.10	16w20a 16w21a 16w21b pre1 pre2

1.10.1
1.10.2

👁 ItemSprite ocean-explorer-map-pre-texture-update.png: Sprite image for ocean-explorer-map-pre-texture-update in Minecraft
Exploration Update
(Guide)

1.11	16w32a 16w32b 16w33a 16w35a 16w36a 16w38a 16w39a 16w39b 16w39c 16w40a 16w41a 16w42a 16w43a 16w44a pre1
1.11.1	pre 16w50a

1.11.2

👁 BlockSprite white-glazed-terracotta.png: Sprite image for white-glazed-terracotta in Minecraft
World of Color Update
(Guide)

1.12	17w06a 17w13a* 17w13b 17w14a 17w15a 17w16a 17w16b 17w17a 17w17b 17w18a* 17w18b pre1 pre2 pre3* pre4 pre5 pre6 pre7
1.12.1	17w31a pre1
1.12.2	pre1 pre2

👁 ItemSprite trident.png: Sprite image for trident in Minecraft
Update Aquatic
(Guide)

1.13	17w43a 17w43b 17w45a 17w45b 17w46a 17w47a 17w47b 17w48a 17w49a 17w49b 17w50a 18w01a 18w02a 18w03a 18w03b 18w05a 18w06a 18w07a 18w07b 18w07c 18w08a 18w08b 18w09a 18w10a 18w10b 18w10c 18w10d 18w11a 18w14a 18w14b 18w15a 18w16a 18w19a 18w19b 18w20a 18w20b 18w20c 18w21a 18w21b 18w22a 18w22b 18w22c pre1 pre2 pre3 pre4 pre5 pre6 pre7 pre8 pre9 pre10
1.13.1	18w30a 18w30b 18w31a 18w32a 18w33a pre1 pre2
1.13.2	pre1 pre2

👁 EffectSprite bad-omen-revision-2.png: Sprite image for bad-omen-revision-2 in Minecraft
Village & Pillage
& 👁 BlockSprite block-of-emerald.png: Sprite image for block-of-emerald in Minecraft
Texture Update
(Guide)

1.14	18w43a 18w43b 18w43c 18w44a 18w45a 18w46a 18w47a 18w47b 18w48a 18w48b 18w49a 18w50a 19w02a 19w03a 19w03b 19w03c 19w04a 19w04b 19w05a 19w06a 19w07a 19w08a 19w08b 19w09a 19w11a 19w11b 19w12a 19w12b 19w13a 19w13b* 19w14a 19w14b pre1 pre2 pre3 pre4 pre5
1.14.1	pre1 pre2
1.14.2	pre1 pre2 pre3 pre4*
1.14.3	pre1 pre2 pre3 pre4
1.14.4	pre1 pre2 pre3 pre4 pre5 pre6 pre7

👁 EntitySprite bee.png: Sprite image for bee in Minecraft
Buzzy Bees
(Guide)

1.15	19w34a 19w35a 19w36a 19w37a 19w38a 19w38b 19w39a 19w40a 19w41a 19w42a 19w44a 19w45a 19w45b 19w46a 19w46b pre1 pre2 pre3 pre4 pre5 pre6 pre7
1.15.1	pre1
1.15.2	pre1 pre2

👁 ItemSprite netherite-ingot.png: Sprite image for netherite-ingot in Minecraft
Nether Update
(Guide)

1.16*	20w06a 20w07a 20w08a 20w09a 20w10a 20w11a 20w12a 20w13a 20w13b 20w14a 20w15a 20w16a 20w17a 20w18a 20w19a 20w20a 20w20b 20w21a 20w22a pre1 pre2 pre3 pre4 pre5 pre6 pre7 pre8 rc1

1.16.1

1.16.2	20w27a 20w28a 20w29a 20w30a pre1 pre2 pre3 rc1 rc2
1.16.3	rc1
1.16.4	pre1 pre2 rc1
1.16.5	pre1 rc1

👁 BlockSprite amethyst-cluster.png: Sprite image for amethyst-cluster in Minecraft
Caves & Cliffs: Part I
(Guide)

1.17	20w45a 20w46a 20w48a 20w49a 20w51a 21w03a 21w05a 21w05b 21w06a 21w07a 21w08a 21w08b 21w10a 21w11a 21w13a 21w14a 21w15a 21w16a 21w17a 21w18a 21w19a 21w20a pre1 pre2 pre3 pre4 pre5 rc1 rc2
1.17.1	pre1 pre2 pre3 rc1 rc2

👁 ItemSprite music-disc-otherside.png: Sprite image for music-disc-otherside in Minecraft
Caves & Cliffs: Part II
(Guide)

1.18	Experimental 1 2 3 4 5 6 gameplay-tweaks 7 21w37a 21w38a 21w39a 21w40a 21w41a 21w42a 21w43a 21w44a pre1 pre2 pre3 pre4 pre5 pre6 pre7 pre8 rc1 rc2 rc3 rc4
1.18.1	pre1 rc1 rc2 rc3
1.18.2	22w03a 22w05a 22w06a 22w07a pre1 pre2 pre3 rc1

👁 BlockSprite sculk-sensor.png: Sprite image for sculk-sensor in Minecraft
The Wild Update
(Guide)

1.19	Experimental 1 22w11a 22w12a 22w13a 22w14a 22w15a 22w16a 22w16b 22w17a 22w18a 22w19a pre1 pre2 pre3 pre4 pre5 rc1 rc2
1.19.1	22w24a pre1 rc1 pre2 pre3 pre4 pre5 pre6 rc2 rc3
1.19.2	rc1 rc2
1.19.3	22w42a 22w43a 22w44a 22w45a 22w46a pre1 pre2 pre3 rc1 rc2 rc3
1.19.4	23w03a 23w04a 23w05a 23w06a 23w07a pre1 pre2 pre3 pre4 rc1 rc2 rc3

👁 Image
Full Release (1.20–1.21) (2023–2025)

👁 ItemSprite brush.png: Sprite image for brush in Minecraft
Trails & Tales
(Guide)

1.20	23w12a 23w13a 23w14a 23w16a 23w17a 23w18a pre1 pre2 pre3 pre4 pre5 pre6 pre7 rc1
1.20.1	rc1
1.20.2	23w31a 23w32a 23w33a 23w35a pre1 pre2 pre3 pre4 rc1 rc2

👁 EntitySprite bat.png: Sprite image for bat in Minecraft
Bats and Pots
(Guide)

1.20.3	23w40a 23w41a 23w42a 23w43a 23w43b 23w44a 23w45a 23w46a pre1 pre2 pre3 pre4 rc1
1.20.4	rc1

👁 EntitySprite armadillo.png: Sprite image for armadillo in Minecraft
Armored Paws
(Guide)

1.20.5	23w51a 23w51b 24w03a 24w03b 24w04a 24w05a 24w05b 24w06a 24w07a 24w09a 24w10a 24w11a 24w12a 24w13a 24w14a pre1 pre2 pre3 pre4 rc1 rc2 rc3
1.20.6	rc1

👁 ItemSprite mace.png: Sprite image for mace in Minecraft
Tricky Trials
(Guide)

1.21	24w18a 24w19a 24w19b 24w20a 24w21a 24w21b pre1 pre2 pre3 pre4 rc1
1.21.1	rc1

👁 ItemSprite bundle.png: Sprite image for bundle in Minecraft
Bundles of Bravery
(Guide)

1.21.2	24w33a 24w34a 24w35a 24w36a 24w37a 24w38a 24w39a 24w40a pre1 pre2 pre3 pre4 pre5 rc1 rc2

1.21.3

👁 BlockSprite open-eyeblossom.png: Sprite image for open-eyeblossom in Minecraft
The Garden Awakens
(Guide)

1.21.4	24w44a 24w45a 24w46a pre1 pre2 pre3 rc1 rc2 rc3

👁 BlockSprite wildflowers.png: Sprite image for wildflowers in Minecraft
Spring to Life
(Guide)

1.21.5	25w02a 25w03a 25w04a 25w05a 25w06a 25w07a 25w08a 25w09a 25w09b 25w10a pre1 pre2 pre3 rc1 rc2

👁 EntitySprite happy-ghast.png: Sprite image for happy-ghast in Minecraft
Chase the Skies
(Guide)

1.21.6	25w15a 25w16a 25w17a 25w18a 25w19a 25w20a 25w21a pre1 pre2 pre3 pre4 rc1
1.21.7	rc1 rc2
1.21.8	rc1

👁 EntitySprite copper-golem.png: Sprite image for copper-golem in Minecraft
The Copper Age
(Guide)

1.21.9	25w31a 25w32a 25w33a 25w34a 25w34b 25w35a 25w36a 25w36b 25w37a pre1 pre2 pre3 pre4 rc1
1.21.10	rc1

👁 ItemSprite spear.png: Sprite image for spear in Minecraft
Mounts of Mayhem
(Guide)

1.21.11^‡	25w41a 25w42a 25w43a 25w44a 25w45a^‡ 25w46a^‡ pre1^‡ pre2^‡ pre3^‡ pre4^‡ pre5^‡ rc1^‡ rc2^‡ rc3^‡

👁 Image
Full Release (2026–present)

👁 EntitySprite baby-chicken.png: Sprite image for baby-chicken in Minecraft
Tiny Takeover
(Guide)

26.1	snap1 snap2 snap3 snap4 snap5 snap6 snap7 snap8 snap9 snap10 snap11 pre1 pre2 pre3 rc1 rc2 rc3
26.1.1	rc1
26.1.2	rc1

👁 EntitySprite sulfur-cube.png: Sprite image for sulfur-cube in Minecraft
Chaos Cubed
(Guide)

26.2	snap1 snap2 snap3 snap4 snap5 snap6 snap7 snap8 pre1 pre2 pre3 pre4 pre5 pre6 rc1 rc2

👁 BlockSprite poplar-sapling.png: Sprite image for poplar-sapling in Minecraft
Third Drop 2026
(Guide)

26.3	snap1

* indicates a reupload | ^† indicates a lost version | ^‡ indicates a version with a variant

Retrieved from "https://minecraft.wiki/w/Java_Edition_12w42a?oldid=3618469"

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Java Edition 12w42a

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