Java Edition 1.12/Development versions

This is a list of Java Edition 1.12 development versions.

17w06a

17w06a is the first snapshot released for Java Edition 1.12, and the first snapshot released in 2017.

Additions

Blocks

Concrete

• Comes in the 16 traditional dye colors
• Created when Concrete Powder comes into contact with still or flowing water

Concrete powder

• Comes in the 16 traditional dye colors
• Gravity affected (like sand and gravel).
• When it touches water, it turns into a Concrete block.
• Craftable. Crafting: 4 sand, 4 gravel and one of any dye to get 8 concrete powder blocks. The recipe is shapeless.

Glazed terracotta

• Comes in the 16 traditional dye colors
• Smelt any colored stained clay in a furnace to obtain the glazed terracotta of that color (not for regular hardened clay).
• Can be placed in 4 directions: north, south, west and east.
  • When placed down while facing the right directions, a repeating pattern can be created. For example, the white glazed terracotta will create the pattern of a sun when 4 are placed down correctly.

General

Creative

• Added "Saved Toolbars" tab
  • Save toolbars in Creative Mode with Ctrl+1-9/⌘ Cmd+1-9 and load them with ⇧ Shift+1-9.
  • Can save up to 9 toolbars.
  • If an empty toolbar is saved, it will clear the bookmarked toolbar and put back the 'informational paper' in the respective slot.

Changes

Blocks

A comparison of banner colors before and after 17w06a. Image by Jeb.

Wool and carpets

• New palette texture.

Banners

• New palette texture.

Magma blocks

• Are now able to burn infinitely, like Netherrack.

Beds

• Now you can sleep when a neutral Zombie Pigman is near.

Mobs

Sheep

• New color palette for wool on body.

Non-mob entities

Paintings

• Will now try to place the largest possible in the available space it has.

General

Creative

• Materials tab merged with Miscellaneous tab.

Fixes

3 issues fixed

From released versions before Java Edition 1.12

• MC-5228 – Cow's/Mooshroom's udder texture is wrong
• MC-110474 – Activator Rail ejects 2 block tall Mobs to the wrong spot inside of 2 block tall room
• MC-113125 – Loaded world shows clouds and void for few seconds

17w13a

17w13a is the second snapshot released for Java Edition 1.12, which adds parrots.

Additions

Items

Knowledge books

• A green-colored book.
• Currently obtainable only with the /give @p knowledge_book command.
• A Knowledge Book with a Recipes NBT tag, which contains a list of item IDs, will be consumed and unlock the specified items' recipes for any player that uses it.
  • Especially useful when /gamerule doLimitedCrafting is set to true.

Spawn eggs

• Parrot (new mob): Green with red dots.

Mobs

Parrots

• Tamable with cookies
• Fly around, but sit when "tired."
• Follow and crowd around nearby mobs.
• Imitates sounds of other mobs.
• Using tamed parrots will place them on the player's shoulder.
  • Will let go if the player jumps.
  • Can fly with players during elytra flight.
• Have 6 health.
• Come in red, blue, green and cyan.

Gameplay

Gamerules

• doLimitedCrafting
  • Off by default.
  • Enabling will only allow players to craft recipes they have unlocked.

Command format

/recipe <give|take> [player] <name|*>

• Can unlock, or lock, the given recipes for the given player.
• If * is specified, it will lock or unlock all recipes for the player.

/advancement <grant|revoke|test> <player> <advancement> [criterion]

• Can grant, test or revoke advancements, and particular advancement criteria, for a given player.

General

Advancements

• Replaces achievements.
• Can be customized via JSON files.
• Tab-based UI.
  • Currently one tab (Minecraft) although more will be supported in the future.
  • Different background per tab, single texture on repeat for now.
  • Data-driven UI, including positioning and layout.

Narrator

• CTRL + B toggles a text-to-speech engine that automatically reads player chat messages, including the name.
• The Narrator will not read commands or command outputs, nor will it read messages produced with /me.

NBT tags

• ShoulderEntityLeft / ShoulderEntityRight: Contains entity data about an entity on the left and right shoulders of the player.
• seenCredits: Changes to 1 if the player leaves the End through the portal.
• recipeBook: A string containing a list of recipes, formatted as JSON, that the player has seen.
• Recipes: A list of crafting recipes to unlock for the player that right-clicks while holding a Knowledge Book.
  • If this is not specified, the Knowledge Book will not be consumed.

Recipe books

• Catalogs recipes that are unlocked when the criteria are met.
• When a recipe is clicked, it will appear in the crafting grid, and can be crafted if materials are available.
• recipes folder added with all item recipes as .json files.

Changes

Blocks

Comparison of the terracotta texture changes.

Glazed Terracotta

• Textured changed for cyan, magenta, orange, and white glazed terracotta, to remove unintentional and potentially offensive imagery.

Beacons

• Now display their name when hovering over them.

Enchantment Tables

• Now display their name when hovering over them.

Items

Fishing rods

• Changed the sound of bobbers being thrown.

General

Achievements

• Removed and replaced by advancements.

Crafting

• Closing the crafting interface with items inside will no longer drop the items in front of you, but will send them instead to the inventory.

Java version

• This is the first snapshot to use, and thus require, Java 8.

Moving backwards

• The player's body now entirely faces to the front, when moving backwards.
  • Prior to this snapshot, moving backwards would cause the player model to rotate one side, making it look like the player was strafing backwards somewhat.

Fixes

2 issues fixed

From the previous development version

• MC-113377 – New block Swastika
• MC-113844 – White Glazed Terracotta symbol (looks like the symbol of the Hungarian Nazi party)

17w13b

17w13b is the third snapshot released for Java Edition 1.12.

Additions

Mobs

Parrots

• Added gray-yellow parrot, resembling a cockatiel.

Fixes

13 issues fixed

From the previous development version

• MC-114878 – Crash: Initializing game - java.lang.UnsatisfiedLinkError: Unable to load library
• MC-114881 – Some entity block models do not render.
• MC-114883 – No recipes unlocking on server.
• MC-114891 – Advancement window is blank when no advancements are unlocked.
• MC-114893 – Parrots being erased from existence if too many are held.
• MC-114909 – Parrots' Eye Level isn't Aligned with their Model's Eyes.
• MC-114933 – Parrots don't Imitate Cave Spiders.
• MC-114936 – Game crashes when trying to use crafting book and items needed are in off-hand or armor slots.
• MC-114937 – Parrots show hearts when clicked with wheat.
• MC-115004 – "Summon the Wither" advancement checks to see if you summoned the ender dragon.
• MC-115026 – Message in the chat: New recipe unlocked for minecraft.
• MC-115098 – Parrots unrestricted spawning causing world to inevitably crash from the number of entities.
• MC-115101 – "full" option for the "inventory_changed" trigger inversely compares stack size.

17w14a

17w14a is the fourth snapshot released for Java Edition 1.12.

Changes

Mobs

Parrots

• They are now able to make sounds while sitting on the player's shoulders
• Parrots now dance and change colors if playing music on a nearby jukebox
• Changed the right-click action:
  • Right-click on a tamed parrot tells it to sit down
• Walking over/through/near a tamed parrot while crouching will cause it to sit on the player's shoulders

Zombies

• New ConversionPlayerLeast and ConversionPlayerMost tags
  • Contains the UUID of the player that is converting the zombie.
  • Used with the "minecraft:cured_zombie_villager" trigger for advancements.

General

Advancements

• Added new advancements, including a new "adventure" tab
• Pop-up notification for when players advance
  • New sliding effect
  • Comes in two different colors - yellow for normal advancements, and pink for "challenge" advancements

NBT tags

• recipeBook: Now a compound tag (was a string) containing recipe book information
  • isFilteringCraftable: Becomes 1 if the player has enabled the "Show Craftable" feature in the recipe book.
  • isGuiOpen: Checks if the player has left the GUI open.
    • unlocked
  • recipes: Contains information about all recipes the player has seen.
    • displayed: Checks if the player has tried out the recipe in the recipe book before (by clicking it/viewing it)

Recipe book

• Changed the icon on the trigger button, from a standard book to the Knowledge Book
• Added a shift-click ability to the recipe book that puts all available materials in the crafting grid.
• Added a new white-and-gray colored notification that pops up when the player unlocks new recipes
  • The notification only appears upon reloading the world; Dinnerbone has stated that this is a bug
• If you search "excited" (changed in 17w18a) in the Recipe book, your language switches to Pirate Speak.

Splashes

• "Now Java 6!" changed to "Now Java 8!"

Fixes

21 issues fixed

From the Java Edition 1.12 development versions

• MC-114879 – Picking up an item has a chance to duplicate it
• MC-114896 – Parrots don't make any sounds when they are on your shoulder
• MC-114943 – Items in crafting table disappear when selecting a recipe
• MC-114976 – Parrots don't show up on subtitles
• MC-114987 – Unknown recipe message not translated
• MC-114989 – recipe command causes unknown errors with invalid player argument
• MC-114999 – Hover text of items in crafting grid is rendered behind crafting help
• MC-115028 – Crafting recipe pop-up renders above items in the inventory gui
• MC-115054 – Recipe interface doesn't remember "showing all/craftable" preference when inventory closed
• MC-115065 – "loot" reward for advancements does not provide items
• MC-115067 – All instances of entity-matching conditions do not function for advancements
• MC-115074 – Potion effects are still rendered under the recipe book
• MC-115100 – Hover text of items in crafting help does not use same text and text box like hovering over item in inventory
• MC-115107 – Helmet does not render after using autorecipe feature
• MC-115123 – Parrots keep moving their legs even if they are on shoulders
• MC-115129 – Missing crafting recipe resources render in front of item description
• MC-115153 – recipe command not showing an error with invalid first argument
• MC-115175 – New crafting menu texture bug
• MC-115204 – Crash when canceling/changing recipe in recipe book with full inventory

From the previous development version

• MC-115191 – Parrots disappear completely when leaving the End via a portal
• MC-115209 – Crafting Book Not Accounting for Item Count

17w15a

17w15a is the fifth snapshot released for Java Edition 1.12.

Additions

Blocks

Beds

• Added colored beds which can be crafted with colored wool or by dyeing a white bed
• Now bounce the player like slime blocks, albeit much less
• Now reduce (but not negate) fall damage when landed on
  • The player can survive a 41 block fall onto a bed
    • Any higher, and the second bounce will deal the remaining amount of damage to kill them
  • The player can survive a 45 block fall onto a bed if they don't take further fall damage (e.g. by landing on a platform)
• Now a block entity, and each half can be colored individually using the NBT tag color
• Now use a 3D item model instead of a 2D item because of the new colors

General

Advancements

• Added descriptions to advancements and changed some titles
• The Adventuring Time achievement has been made into an advancement

Narrator

• Added a toast notification for toggling the narrator
• Added the option to toggle narrator between: "off", "chat & system", "chat only", and "system messages only"

Splashes

• Added "Don't feed chocolate to parrots!"

Changes

Blocks

Stairs

• The rear face and underside of stairs are now considered "solid"
  • Allows for torches, fences, iron bars, glass panes, walls, and snow layers to connect to them properly

Fences, cobblestone walls, glass panes, and iron bars

• Now connect to stairs, buttons, signs, all types of rails, banners, string, redstone, pressure plates, levers, tripwire hooks, sticky pistons, and structure voids.

Mobs

Parrots

• No longer cycle through parrot colors when dancing

General

Recipe books

• The icon in the pop-up notification now quickly cycles through all recipes that were unlocked

Fixes

43 issues fixed

From released versions before Java Edition 1.12

• MC-2813 – Snow doesn't form / cannot be placed on upside down slabs / stairs
• MC-8345 – Placing torch on backside of stairs impossible
• MC-9176 – Glass panes not correctly rendering with the back of stairs
• MC-10613 – Fence doesn't connect with stairs
• MC-11963 – bed hind legs not rendered
• MC-109663 – Tamed dogs attack tamed cats

From the Java Edition 1.12 development versions

• MC-114899 – Recipes removed on gamemode 2
• MC-114907 – Parrots in flight tend to spin around in circles rather than fly in a direction
• MC-114950 – Book crafting recipe doesn't exist in the newest snapshot
• MC-114961 – Multiplayer players get kicked on pickup first item for advancement
• MC-114974 – Clicking on crafting recipe in Spectator mode moves items to crafting grid
• MC-114991 – Crafting recipe list shows 1/0 pages when no recipes were unlocked
• MC-115025 – Clicking on recipe or on book to close crafting help additionally clicks in inventory
• MC-115048 – Parrots sitting on shoulders don't drown in water or burn in lava / Parrots shouldn't go diving
• MC-115050 – Statistics page never loads
• MC-115064 – Custom advancements in world folder use the "minecraft" namespace instead of folder name
• MC-115121 – Credits are not shown when leaving end for the first time but after that are always shown
• MC-115148 – F3 + T does not reload advancements but does reload loot tables
• MC-115157 – No advancements on server
• MC-115159 – Repeated key events are not enabled for crafting search
• MC-115182 – Parrots become invisible when on a players shoulder while player swims up.
• MC-115184 – Parrot imitations show up on subtitles as original sound
• MC-115221 – Certain blocks don't render correctly in crafter helper.
• MC-115277 – Your tamed wolf will attack your tamed parrot
• MC-115341 – Bug with the Narrator
• MC-115361 – doLimitedCrafting set to 'true' disables ability to combine used tools

From the previous development version

• MC-115423 – Duplicate bug in "Click and hold for more" menu + text message bug
• MC-115426 – Background doesn't become darker in most GUIs
• MC-115427 – Tool info not showing up in most GUIs
• MC-115436 – Item duplication using recipe book
• MC-115443 – 17w14a doLimitedCrafting(true) returns FATAL ERROR on servers when recipe should unlock
• MC-115444 – "Obtain Armor" and "Shiny Gear" advancement notification at each piece of armor.
• MC-115462 – Can craft "incomplete" recipe using alternate ingredients
• MC-115465 – Items can be dropped if you click while hovering over recipe interface
• MC-115466 – 17w14a doLimitedCrafting(true) Crafting Based duplication
• MC-115469 – Parrots do not appear dancing for other players
• MC-115470 – Parrots go to players' shoulders in spectator mode
• MC-115474 – Taken recipes are still available until player relogs
• MC-115481 – 17w14a STDOUT spam when hurting/killing mobs
• MC-115504 – Recipe book does not correctly render character
• MC-115508 – Parrots on your shoulder look darker if many items in your inventory
• MC-115530 – "Recipes unlocked" message only shows up when reloading the world.
• MC-115726 – Tool and armor duplication glitch with doLimitedCrafting set to true

17w16a

17w16a is the sixth snapshot released for Java Edition 1.12.

Additions

Blocks

Note blocks

• When placed on top of a bone block, wool, clay, packed ice or gold blocks, the noteblock produces no sound when altered or activated (this is to make place for new noteblock sounds coming up).
  • Added sound events (when using /playsound) for the following:
    • minecraft:block.note.bell
    • minecraft:block.note.chime
    • minecraft:block.note.flute
    • minecraft:block.note.guitar
    • minecraft:block.note.xylophone

Mobs

Version exclusive: Illusioners

• New illager.
• Affects players with Blindness for 20 seconds then shoots with a bow.
• Summons duplicates of itself.
  • All duplicates will show shooting animation, but only the real one can be hit and shoots the arrow
• Does not currently have a spawn egg, so can only be summoned with /summon illusion_illager
• Targets both the player and villagers

Command format

Selectors

• @s
• Targets the executing entity, e.g: /execute @e[type=Villager] ~ ~ ~ /say @s

General

All the tutorial hints.

Version exclusive: Tutorial hints

• Displayed in the top right
• Will display only in Survival mode, and only upon starting a new world for the first time
  • Saved per player, stored in options.txt
    • Name: tutorialStep
    • List of criteria: movement, find_tree, punch_tree, open_inventory, craft_planks, and none

Controls

• Version exclusive: Added keybinding options for Creative toolbar saving

JSON format

• Added 'group' to recipe json format, to clump similar recipes together
• Added new 'keybind' text component, to refer to the player's keybindings

Changes

Blocks

Hardened clay

• Renamed to terracotta.

Glazed terracotta

• Will no longer "stick" to slime blocks if attached to the side, top or bottom, but not if attached to the front or back.

Shulker boxes

• Colors changed in accordance with the changes to other block colors.
  • This causes the 'default' (purple) shulker boxes to be a vibrant purple that mismatches all other purpur items and blocks (reverted in 17w17a).

Command blocks

• Now executes all of the commands in a chain before scheduling them for the next tick.
  • It is now possible to stop/modify the operation of a chain via commands and get results instantly (as opposed to getting them in a 1 tick delay).

Items

Fishing rods

• Version exclusive: Added sounds for reeling in the fishing bobber.

Mobs

Comparison of old and new shulker and shulker box colors.

Shulkers

• Colors changed in accordance with the changes to other block colors.
  • This causes the 'default' (purple) shulkers to be a vibrant purple that mismatches all other purpur items and blocks (reverted in 17w17a).

General

Narrator

• Now displays a message whenever the Narrator isn't available.

Controls

• Version exclusive: Pressing F1 will now hide all toast messages.

NBT format

• Improved NBT parsing in commands.
  • Keys can now (optionally) be quoted, e.g: "Motion":[0.0,0.0,0.0]
  • Unquoted string values are now stricter; they can no longer contain spaces or special symbols, e.g: CustomName:Test Test
  • Indices, which were previously optional in lists, are no longer allowed, e.g: Motion:[0:7.3,1:1.0,2:3.1]
  • Empty keys and values are no longer allowed.
• Improved error messaging; now points to where exactly the error occurred.

Fixes

27 issues fixed

From released versions before Java Edition 1.12

• MC-9565 – Fences and Cobblestone Walls connect to Fence Gates, which are facing the other direction
• MC-95560 – Wrong command message: Last character of NBT parsing error message is missing
• MC-97662 – NBT parser regex checks for pipebars as tag declaration
• MC-114219 – NBT integer array regex matches non integer arrays
• MC-114220 – NBT integer arrays have trailing comma in string representation

From the Java Edition 1.12 development versions

• MC-113915 – Inadvertently saving/overwriting saved hotbars due to stuck modifier key
• MC-114889 – Parrots on shoulders disappear when flying up in creative or spectator mode
• MC-115046 – Recipe book icon changes when wearing enchanted armor
• MC-115336 – Closing crafting menu drops or deletes items in some cases
• MC-115528 – Local client crashes when using the new shift click recipe book in a server
• MC-115603 – Shift clicking recipe deletes other applicable items with different meta data

From the previous development version

• MC-115797 – Server output shows errors and nothing else
• MC-115802 – Crash when going to Statistics/items-blocks or trying to customize Superflat settings
• MC-115806 – Clicking on coloring white bed recipe selects creating bed recipe (placing planks in armor slots of player)
• MC-115807 – Game crash if right clicked on the underside of block with torch in hand
• MC-115809 – Advancements/recipes notifications don't show correctly in F1 mode.
• MC-115812 – ⇧ Shift + F3 crashes the game
• MC-115837 – Gap between advancements and recipe toast
• MC-115873 – Can't drop items by clicking outside of inventory
• MC-115938 – Toasts darken in some GUIs and while some tooltips are displayed
• MC-115942 – Parrots imitating mobs causes null pointer exception
• MC-116004 – "Parrot" isn't translatable in the "imitates" subtitle
• MC-116136 – Parrots are invisible when on shoulder
• MC-116213 – Parrots on your shoulder change color when the player is wearing an enchanted elytra
• MC-116314 – Bows destroy other bows while crafting using recipe book
• MC-116316 – Shulker boxes not matching the new hues

From the current version, hotfixed

• MC-116352 – Crash when opening the chat settings

17w16b

17w16b is the seventh snapshot released for Java Edition 1.12.

Additions

Gameplay

Gamerules

• maxCommandChainLength
  • The default is 65536.
  • Determines the number at which the chain command block acts as a "chain".

General

Advancements

• New trigger: minecraft:item_durability_changed
  • Triggers when an item in the player's inventory is damaged in some manner, such as hurting a mob with a sword.
  • Three conditions that can be used for this trigger:
    • item: Checks information about the item before durability loss.
    • durability: Checks the durability of the item after durability loss.
    • delta: Checks how much durability was lost.

Fixes

9 issues fixed

From released versions before Java Edition 1.12

• MC-111753 – Hopper/Dropper will not input water bottles into brewing stand after potions have been removed by a hopper from brewing stand

From the Java Edition 1.12 development versions

• MC-115883 – Parrots disappear when climbing ladders/vines
• MC-116271 – Parrots turn red

From the previous development version

• MC-116357 – Some items appear multiple times in the recipe book
• MC-116365 – The "conditional" setting no longer works for command blocks
• MC-116372 – Chain command blocks set to "needs redstone" still executes without signal
• MC-116388 – Chain command blocks can clone themselves to create an infinite loop which freezes the server
• MC-116398 – Crash when changing dimension/relogging with a full inventory
• MC-116432 – Server crashed when leaving items on crafting table with full inventory

17w17a

17w17a is the eighth snapshot released for Java Edition 1.12.

Additions

General

Advancements

• Added new advancements
  • New tabs: "The End" and "Nether"
• New levitation trigger, with the following conditions:
  • duration - number of ticks the player is levitating for
  • distance - distance the player levitated so far
  • Both can be either a range (min and / or max) or a value (value)
• New feature condition added to the location trigger
  • The value is a feature name as used in the /locate command

NBT tags

• UpdateLastExecution (byte):
  • Defaults to 1b. If set to 0b, loops can be created, where the same command block can run multiple times in one tick.
• LastExecution (long):
  • Stores the tick a chain command block was last executed in.
• toBeDisplayed (list):
  • Added into the recipeBook compound of the player.
  • Within are recipe names that the player has unlocked but not viewed in the crafting helper yet
  • Used for remembering to play the animation for new recipes

Sounds

• New note block sounds
  • Bone block = xylophone
  • Block of gold = bell
  • Clay = flute
  • Packed ice = chime
  • Wool = guitar

• New sound effects
  • Parrots
  • Illusioners
  • Casting a fishing rod
  • Reeling in a fishing rod
  • Throwing an eye of ender
  • An eye of ender exploding or popping back into item form
  • Putting ender eye in end portal frames (dinging sound)
  • Completing the end portal and having the portal spawn (evil sound)
  • Boat paddles

Changes

Blocks

Terracotta

• It has now unique colors on the map

Beds

• Each leg can now be textured individually

Mobs

Illusioners

• Its blindness spell will only be cast if the regional difficulty is 3 or above.

Shulkers

• Reverted the purple shulker color change from 17w16a.

Command format

• /advancement:
  • Added five modifiers to the /advancement grant and /advancement revoke commands:
    • "everything" - all advancements, no specification required (same as "*")
    • "from" - this advancement, its children, and their children, etc.
    • "until" - this advancement, its parent, and its parent, etc.
    • "through" - both of the above
    • "only" - this advancement, and nothing else
  • Examples:
    • /advancement grant dinnerbone until story/elytra
    • /advancement revoke dinnerbone everything

General

Advancements

• Moved some existing advancements around
• Advancements can now execute commands when achieved
  • The command written in the rewards section of the advancement will be executed as the player (for example writing /say @s would be equivalent to /execute <the_player_who_obtained_this_advancement> ~ ~ ~ say @s)
• Advancement icons now allow data values
  • Specifically, icon has switched from being a string to an object
    • Within it are a required item string (specifying the item ID) and an optional data integer, specifying the metadata of the item
• The "damage flags object" now contains two new entity objects:
  • source_entity - specifies the "owner" of the damage that was dealt
  • direct_entity - specifies the direct cause of the damage

Crafting

• Optimized the recipe book

Fixes

20 issues fixed

From released versions before Java Edition 1.12

• MC-116623 – Stained hardened clay / terracotta blocks do not have correct color on map

From the Java Edition 1.12 development versions

• MC-114979 – advancement command doesn't allow bulk grant/revoking
• MC-115056 – "Remote Getaway" advancement cannot be obtained by using ender pearls
• MC-115170 – Advancements Test Command Success Uses the Wrong Translation
• MC-115173 – Unsuccessful advancement test command has player and advancement name interchanged
• MC-115442 – Advancement alerts aren't aligned to the top-right corner
• MC-115574 – "Sniper Duel" advancement triggered when killing non-skeleton mob at distance
• MC-115740 – Inconsistent error message for /advancement grant @p *
• MC-115805 – Fences/panes/walls/bars/torches connect to a number of non-solid blocks
• MC-115821 – Tooltips with long titles in the advancements menu are cut off
• MC-115880 – 'Take Aim' advancement granted by projectiles other than arrows
• MC-115936 – Narrator does not properly read output from /say, /tell and /tellraw command
• MC-115940 – Division by zero crash with alternating /recipe commands
• MC-116016 – Advancement "adventure/trade" uses criteria named "shot_arrow"
• MC-116245 – "Zombie Doctor" advancement description has a period, while others don't

From the previous development version

• MC-116471 – Conditional command blocks SuccessCount doesn't update
• MC-116514 – "durability" option for item-based triggers succeeds for items without durability
• MC-116516 – "item_durability_changed" triggers when base change is 0, but not when Unbreaking reduces the change to 0
• MC-116536 – Recipe red/white outline is inconsistent while searching
• MC-116650 – Wooden fences connect to nether brick fence

17w17b

17w17b is the ninth snapshot released for Java Edition 1.12.

Additions

General

NBT tags

•  LoveCauseLeast,  LoveCauseMost for breedable entities.
  • Together these record the UUID of the entity that caused a given animal to breed.

Advancements

• Added a new number display to track progress while completing certain advancements
• Added the changed_dimension trigger
  • Takes two optional conditions: to and from, both being strings that accept "overworld", "the_nether", or "the_end".
  • Without the conditions, you can check if the player travels to any dimension from any dimension.
• The "location" shared object has a new dimension string (same values as above).

Changes

Mobs

Illusioners

• The regional difficulty requirement for them to cast their Blindness spell is decreased from 3 to 2.

General

Advancements

• The default advancements now all receive their titles and descriptions from the localization files.

Fixes

15 issues fixed

From released versions before Java Edition 1.12

• MC-108175 – Villagers sent through an end gateway portal in a minecart lose their AI.

From the Java Edition 1.12 development versions

• MC-114971 – Missing usage translation for /advancement test command
• MC-115392 – Only host can unlock advancements on LAN
• MC-115505 – Advancement background does not find texture from resources.zip embedded in world folder
• MC-115710 – Rapidly pressing jump while riding a vehicle will make the parrot on your shoulder invisible
• MC-116143 – Don't have to enter the Nether to get the "Nether" advancement
• MC-116616 – The bred_animals trigger doesn't work when saving & re-entering after breeding
• MC-116683 – The @s selector not mentioned in command block interface

From the previous development version

• MC-116654 – "Spooky Scary Skeleton" (nether/get_wither_skull.json) advancement tests for blaze rod instead of wither skull
• MC-116656 – Closing world during ender dragon respawn and reopening it causes crash
• MC-116661 – Long advancement titles are cut off in toasts
• MC-116665 – Recipe command tab completes string representation of recipe objects
• MC-116671 – The "durability" option for item-based triggers fails for items with durability
• MC-116676 – Parrots don't imitate illusioners
• MC-116700 – "The End" is granted to the player when they step on the portal

17w18a

17w18a is the tenth snapshot released for Java Edition 1.12.

Additions

Gameplay

Gamerules

• /gamerule announceAdvancements
  • Defaults to true
  • Toggles announcing of advancements in chat, replacing the old server.properties entry

Command format

/reload

• Command to reload advancements and loot tables from disk
• This command is available to all opped players in single player and to all level 4 operators on a multiplayer server.
• Cannot be run from a command block.

General

Advancements

• Re-introduced announcements to chat when someone earns an advancement
  • Shows the description on hover, like before with achievements
• Added new Adventure advancements:
  • Best Friends Forever - Tame an animal
  • The Parrots and the Bats - Breed two animals together
  • Two by Two - Breed all the animals! (Requires sheep, cows, pigs, rabbits, chickens, horses, wolves, ocelots, mooshrooms, and llamas)
• Added new minecraft:tick trigger
  • Activates for each player on every tick, provided that the advancement was revoked before the next tick starts.
• Added new minecraft:tame_animal trigger
  • Activates whenever the player tames an animal. The entity condition can be specified to check that the animal that was tamed.
• Added new show_toast display option
  • Optional boolean defaulting to true. When false, the specified advancement will not display the toast popup when the advancement is fulfilled.
• Added new announce_to_chat display option
  • Optional boolean defaulting to true. When false, this specific advancement will not announce the player fulfilling it to the chat for all players to see.

Changes

Blocks

Command blocks

• Optimized error conditions in command blocks

Items

Maps

• Changed some map colors around again
  • Reverted the wool colors on maps
  • Moved dyed blocks such as banners to the new terracotta map color palette

Command format

/give and /replaceitem

• Now reinforces item-specific stacking restrictions.
  • This is a reverse of 16w32a (MC-105965 resolved as "Works as Intended")

General

Advancements

• "entity" objects and the minecraft:levitation trigger now use a shared "distance" object
  • Check if the player is within or outside of the specified range on the x, y, or z axis (in either the positive or negative direction)
  • absolute and horizontal ranges check if the player is within range on all axes, though horizontal will exclude the Y axis.
• Changed the Levitate advancement to 50 vertical blocks
• Changed the Sniper Duel advancement to horizontal distance
• Advancement loading is now strict JSON

Narrator

• Narrator optimized, it should work for more people now

Recipe books

• Some optimizations to the recipe book
• If the player searches "excitedze" in the Recipe book, their language switches to Pirate Speak.
  • Searching "excited" will no longer do this.

Fixes

20 issues fixed

From the Java Edition 1.12 development versions

• MC-113374 – Map color palette changed
• MC-114966 – Advancements overlap other advancements
• MC-115323 – Parrots spawn rarely in Jungle
• MC-115577 – Parrot play the flapping wings(fly) sound, when player push it
• MC-115774 – Parrots still make sounds when they are on player shoulder and Silent:1b
• MC-115810 – Custom resource pack added sounds not playing
• MC-115902 – Flying parrots will not avoid lava
• MC-116482 – The server.properties file still has announce-player-achievements
• MC-116498 – You can't place ladders on the back of stairs
• MC-116515 – Placing a torch on a wall with a fence gate underneath causes crash
• MC-116534 – Pressing "Showing craftable" sometimes doesn't show any recipes
• MC-116537 – Stopping jukebox music while a sitting parrot is dancing occasionally causes the parrot's entire upper body to be misplaced.
• MC-116574 – "showing craftable" option has several issues
• MC-116586 – Items in crafting grid disappear if the inventory is not properly closed
• MC-116638 – Oak Wood in Recipe Book
• MC-116670 – No toast is shown for first advancement made
• MC-116675 – Debug messages are printed in log when levitating
• MC-116704 – The sound block.note.chime is sharp
• MC-116713 – Creating new world with same name crashes with NullPointerException

From the previous development version

• MC-116931 – Crash when placing a snow layer on top of a fence gate

17w18b

17w18b is the eleventh and final snapshot released for Java Edition 1.12.

Additions

General

Advancements

• Added a new "Husbandry" tab and several new advancements:
  • A Seedy Place - Plant a seed and watch it grow
  • Serious Dedication - Completely use up a diamond hoe, and then reevaluate your life choices
  • A Balanced Diet - Eat everything that is edible, even if it's not good for you
  • Hired Help - Summon an Iron Golem to help defend a village
• Added new advancement triggers:
  • consume_item
  • placed_block
  • arbitrary_player_tick - only one player runs it per tick

Changes

General

Advancements

• The "Monster Hunter" and "Monsters Hunted" advancements now use 22 mobs instead of 23, removing the illusioner from the list
• Moved the advancements added in 17w18a into the Husbandry tab

Narrator

• Made the narrator work on nearly all systems (Linux requires Flite for it to work).

Fixes

12 issues fixed

From the Java Edition 1.12 development versions

• MC-114930 – Narrator not working
• MC-115838 – Dark dot on white bed in recipe selection
• MC-116746 – @s selector ignores dx/dy/dz
• MC-116772 – Illusion Illagers are required for advancement "Kill All Mobs" even though they don't spawn
• MC-116810 – Models on Recipe Book tabs render badly
• MC-116821 – doLimitedCrafting gamerule not working
• MC-116940 – Client/server disagreement when using a knowledge book with invalid recipes

From the previous development version

• MC-116950 – Cannot place buttons, levers, torches... on barrier blocks
• MC-116953 – A single horse is considered tamed multiple times in a row
• MC-116974 – Can place block-dependent blocks on glassy blocks or leaves
• MC-116976 – Shulker box duplication when placed below lever
• MC-116985 – Buttons and levers can't be placed on the sides of corner stairs

1.12-pre1

1.12-pre1 is the first pre-release for Java Edition 1.12.

Additions

Gameplay

Gamerule

• gameLoopFunction <namespace:path/to/function/file>
  • Runs a function every tick through the server.

Command format

/function <namespace:path/to/function/file>

• Runs a function once through the entity or command block which ran the /function command.

General

Advancements

• Added new advancements:
  • A Furious Cocktail - Have every potion effect applied at the same time
  • Postmortal - Use a Totem of Undying to cheat death
  • Subspace Bubble - Use the Nether to travel 7km in the Overworld
  • Uneasy Alliance - Rescue a Ghast from the Nether, bring it safely home to the Overworld... and then kill it
• Added hidden field to advancement display info, defaults to false
• Added new effects_changed, used_totem, nether_travel advancements triggers
• Added function to advancement rewards

Functions

• Added new function system, which are plaintext files in world/data/functions/namespace/file.txt
• Functions are a list of commands, one line per command, with // or # comment support

NBT tags

• Added the enteredNetherPosition NBT tag for players.

Changes

Advancements

• Advancement trees are now centered in the UI
• Items & entities in advancements have an extra NBT field (string NBT, like in commands)
• Entities in advancements have an extra effects and location field
• Removed commands from advancement rewards
• Removed arbitrary_player_tick advancement trigger

Recipe books

• Optimized the recipe book

Fixes

34 issues fixed

From released versions before Java Edition 1.12

• MC-11240 – Ignited TNT can be set on fire by a Flame Bow.
• MC-50166 – Game states that "The block couldn't be placed" when using /setblock to place air in a space occupied by a tile entity, despite working
• MC-95367 – Tamed dog, cat or parrot in a minecart teleports to a player (not visually)
• MC-100468 – Dogs, cats and parrots teleport to player despite being in a boat (yet not visually)
• MC-111699 – Can't rename stacked items
• MC-111744 – Anvil outputs only 1 item when renaming

From the Java Edition 1.12 development versions

• MC-113380 – Concrete powder won't turn into concrete when replacing water
• MC-113434 – The color of white wool sheep is light gray
• MC-114235 – Concrete powder texture is not randomly rotated
• MC-114534 – Beacon beam is darker than it should be
• MC-115070 – Issue with crafting table UI on non-16:9 instances
• MC-115206 – Parrots stare at bats over 30 blocks away, through the ground
• MC-115460 – Recipe advancements for yellow dye have reversed unlock conditions
• MC-115813 – Old (non-dyed) beds are invisible
• MC-116024 – Pre-17w15a beds become red if in-world but white in chests
• MC-116459 – Parrots suffocate when getting in a bed with a solid block behind it
• MC-116760 – @a selector doesn't work with the /recipe command in multiplayer
• MC-116945 – Knowledge book gives recipe before removing itself from inventory causing unexpected advancement behavior
• MC-116952 – Can't read CPU info and shows 'CPU: <unknown>' in the debug screen (F3)
• MC-116957 – Advancement doesn't get revoked when /reload is quickly executed afterwards
• MC-116963 – Changing dimension prints debug message in log
• MC-116964 – Parrots sometimes run in circles instead of pathfinding normally.
• MC-117001 – "Serious dedication" challenge is granted when breaking any tool
• MC-117007 – milk_bucket can't trigger consume_item of advancements
• MC-117008 – Vines under trapdoors block them
• MC-117015 – Glass panes & iron bars no longer connect to glass
• MC-117019 – Tripwire hooks break off of backs and sides of stairs upon receiving a block update
• MC-117036 – 17w18b Crafting book glitch
• MC-117063 – Snow layers on barriers
• MC-117069 – Door in Recipe Book when hold click shows the trapdoor recipe
• MC-117118 – Levers / buttons placed on the trapdoor are dropped if pressed
• MC-117160 – Parrots follow and watch invisible mobs
• MC-117161 – Parrots imitate silent mobs
• MC-117167 – Error message for player advancement data containing only "null" calls advancements "achievement"

1.12-pre2

1.12-pre2 is the second pre-release for Java Edition 1.12.

Additions

Advancements

• Added new hidden advancement:
  • How Did We Get Here? – Have every effect applied at the same time

Fixes

5 issues fixed

From the Java Edition 1.12 development versions

• MC-115201 – Narrator does not stop when leaving a world
• MC-117211 – Crash upon crafting without accessing recipe book first
• MC-117218 – Console spammed with command logging even after sendCommandFeedback, commandBlockOutput and logAdminCommands turned off
• MC-117235 – Items are still placed in crafting grid after one stack reached the maximum stack size invalidating recipe and deleting items
• MC-117302 – Recipe book GUI is incorrectly placed when resizing window to show / not show overlapping recipe book

1.12-pre3

1.12-pre3 is the third pre-release for Java Edition 1.12.

Additions

General

Advancements

• Added resistance to the list of required effects in the "How Did We Get Here?" hidden challenge
  • Now gives 1000 experience as a reward, instead of 100
• Added more required food items to the "A Balanced Diet" challenge
  • Now requires 35 food items instead of 30
• Advancements will now remember the tab you last selected
• Changed requirements of advancements to an AND of ORs

Controls

• Added new keybinding for opening advancements (default "L")

Functions

• Now use a new file extension ".mcfunction" instead of ".txt"

Sounds

• Added new sounds for sound events entity.player.hurt_drown and entity.player.hurt_on_fire

Changes

Mobs

Parrots

• Changed parrots to be tamed with seeds, not cookies
  • Attempting to feed a parrot a cookie will instantly kill the parrot
    • The parrot will give off Poison particles as it dies
    • Displays the message "Parrot was slain by <player>"
• Allowed parrots to spawn in old jungles

Withers

• Can no longer break end gateway blocks and piston extensions

General

Functions

• Commands on each line no longer begin with "/" (forwards slash)
• Now only use "#" to comment (not "//")
• Functions should recurse as expected, even while mixing /function and /execute

Optimizations

• Huge optimizations to both recipe book and creative inventory searching
• Some optimizations to advancements

Tutorial hints

• Now smarter about deciding whether or not to display

Fixes

63 issues fixed

From released versions before Java Edition 1.12

• MC-92324 – Players become invisible
• MC-96555 – Wolves, ocelots and parrots can teleport in all non-full cube blocks near owner including path, lava, fire
• MC-101234 – Stack trace is not printed in log when exception occurs while running command
• MC-103067 – The unit for "Minutes Played" statistic is not always minutes
• MC-108304 – "Level Requirement" message is not translatable
• MC-108343 – Minecraft crashes with "java.lang.NullPointerException: Ticking screen" while pinging server on multiplayer server list (previously due to network issues, now more frequent)
• MC-110243 – Sneaking + hit -> moved wrongly / no knockback
• MC-111054 – Invalid lang in options.txt leads to connection error
• MC-112017 – The anvil rename field accepts 31 characters but the server rejects it if it is over 30
• MC-112425 – Hitting rabbits with fire aspect sword: "Couldn't smelt 0xtile.air@0 because there is no smelting recipe"
• MC-112765 – hoverEvent JSON with specified color does not share among new lines
• MC-113255 – Server does not test if some files exist before trying to interact with them
• MC-113429 – Wither can break piston extension and end gateway
• MC-114110 – Constructor for playerlist header and footer packet SPacketPlayerListHeaderFooter is missing footer parameter
• MC-114281 – MutableBlockPos leak
• MC-115407 – Loot entries serialize incorrectly
• MC-116422 – Fires put out by splash water bottles do not cause block update
• MC-117197 – Message for non-existent team specified in entity NBT data is logged as info instead of warning or error

From the Java Edition 1.12 development versions

• MC-115033 – Recipes for certain item subtype are unlocked for any subtype of item
• MC-115404 – Items can duplicate if the item entity gets modified
• MC-116373 – Glazed terracotta blocks can be pulled with slime blocks
• MC-116409 – Popup instructions for new players invasive for experienced users
• MC-116422 – Fires put out by splash water bottles do not cause block update
• MC-116505 – Other sneaking players appear lower than you in multiplayer
• MC-116533 – Glazed terracotta can't be pushed by branched slime block
• MC-116663 – Empty advancement file crashes server when loading world
• MC-116667 – Advancement GUI loading random textures if no background is defined
• MC-116735 – "Previous Output" in command blocks shows under textbox
• MC-116808 – @s is described as "target yourself" in a command block
• MC-116905 – Dispenser recipe uses enchanted bow
• MC-116924 – Invalid advancement frame type crashes server
• MC-116925 – Messages for narrator library are not logged properly
• MC-116926 – Advancement file containing only null crashes server
• MC-116927 – Server crashes with null as advancement title or description value
• MC-116934 – Advancement trigger changed_dimension ignores End to Overworld
• MC-116973 – /fill only supports block entity tags for one of the filled blocks
• MC-116982 – Block particles displayed in corner of area when using destroy option in /fill command
• MC-117009 – Some blocks can't trigger placed_block of advancements
• MC-117012 – placed_block trigger doesn't detect corresponding block from buckets (but does detect the bucket item itself)
• MC-117022 – /fill does not always send block updates
• MC-117035 – Selected advancement tab is forgotten when menu is closed
• MC-117117 – Parrots disappear when entering the back of a boat
• MC-117138 – "Loaded 'X' advancements" console spam
• MC-117197 – Message for non-existent team specified in entity NBT data is logged as info instead of warning or error
• MC-117223 – /reload feedback does not mention functions
• MC-117268 – /function feedback says "commands" despite functions being able to contain only one command
• MC-117313 – Advancements inherit "hidden": "true" field from their parent and cannot be overwritten
• MC-117318 – Advancement title is not highlighted in hover text of advancement announcement in chat
• MC-117331 – Tripwire hooks and ladders can be placed on blocks that they should not be able to
• MC-117518 – Recipe book "Click and hold for more" option does not default to items you have in your inventory

From the previous development version

• MC-117319 – /executeselectors are broken
• MC-117321 – [Functions] Anything commands executed relative to anything doesn't doesn't run the command
• MC-117332 – Gamerule sendCommandFeedback and commandBlockOutput doesn't stop functions from writing errors
• MC-117341 – "How Did We Get Here?" does not require the Resistance effect
• MC-117352 – Advancements misaligned off-screen
• MC-117382 – "How did we get here" advancement does not give the reward
• MC-117402 – Recipe book does not correctly add items to already placed but offset items in crafting grid invalidating recipe
• MC-117419 – Advancement conditions with NBT data do not work correctly for inventory_changed
• MC-117471 – Obtaining charcoal unlocks block of coal recipe
• MC-117481 – Cannot place levers on hoppers anymore
• MC-117545 – Recipe book tabs are cut off/misaligned

Private issues

• MC-111859 – Movement validation wrong
• MC-116425 – Invalid map can crash server

1.12-pre4

1.12-pre4 is the fourth pre-release for Java Edition 1.12.

Additions

Command format

• /function
  • Added new arguments:
    • if <selector> - runs the function only if the specified selector is found (currently only matches 1)
    • unless <selector> - runs the function except when the specified selector is found (currently only matches 0 or 2+)

Changes

Items

Maps

• Beds now have the correct color on the map.

Fixes

17 issues fixed

From the Java Edition 1.12 development versions

• MC-115025 – Clicking on recipe or on book to close crafting help additionally clicks in inventory
• MC-116622 – Sometimes blocks from Creative inventory can't be placed or dropped
• MC-116723 – Particles of cracks when breaking colored shulkers boxes appear with the old color
• MC-117428 – /function with /execute "An unknown error occurred while attempting to perform this command"
• MC-117450 – Fences and walls now connect to melons, pumpkins, and jack-o'lanterns
• MC-117543 – Recipe book is inconsistent with existing UI elements
• MC-117544 – Colored beds don't appear colored on maps

From the previous development version

• MC-117560 – Recipe book crashes the game upon attempting to craft
• MC-117562 – Executing a function as an entity doesn't use new sender
• MC-117563 – Crash when using enchanted bow to craft dispenser via recipe book
• MC-117564 – Game crashes when you click "advancements" button while there is no advancement done
• MC-117579 – Tools and weapons tab icon of recipe book isn't centered
• MC-117580 – Recipe book doesn't update crafting grid if one of its slots already has enough items to craft as often as possible
• MC-117586 – Feeding a parrot uses item in off-hand as well
• MC-117589 – Feeding parrots cookies shows "fell out of world" death message
• MC-117593 – Cookies kill invulnerable parrots in survival mode
• MC-117605 – Ladders can be placed on transparent blocks if a solid block is nearby

1.12-pre5

1.12-pre5 is the fifth pre-release for Java Edition 1.12.

Changes

Advancements

• All recipe unlock advancements now have a parent of minecraft:recipes/root
• Some recipe unlock advancements were renamed

Fixes

9 issues fixed

From the Java Edition 1.12 development versions

• MC-115291 – Text-to-Speech doesn't follow English's grammatical rules... (Instead of saying {Player} says {Text}, it just says {Player} {Text.})
• MC-116961 – Tamed parrots still eat seeds.
• MC-117625 – Executes with relative coordinates in functions doesn't work properly.
• MC-117626 – Cannot use right click to place items in crafting grid after clicking recipe in recipe book while holding an item.
• MC-117628 – Ladders can't be placed above each other/drop when receiving block update.
• MC-117631 – Feeding seeds to tamed parrots additionally makes them sit down / stand up.
• MC-117638 – Ladders only go on adjacent block.
• MC-117643 – Feeding parrot a cookie does not count as killing.
• MC-117667 – Can't feed cookies to tamed parrots.

1.12-pre6

1.12-pre6 is the sixth pre-release for Java Edition 1.12, released on May 29, 2017, which adds the ability to see credits from the menu screen.

Additions

Menu screen

• Added the ability to see credits by clicking the copyright text.

Changes

Blocks

Command blocks

• Tab-completing command names in command blocks will no longer add a / prefix.

Banners

• "Chief fess" and "base fess" banners are now just "chief" and "base" banners.

Non-mob entities

Minecarts with TNT

• No longer instantly explode when hit with fire charges; instead, they explode as if primed by an activator rail.

General

Functions

• Skipped functions (when the conditional fails) is now considered a failure (for example in command blocks).

Language

• Many pieces of text are now translatable, where previously they were hardcoded English.
  • The full list of changes can be found here.

Optimizations

• Optimized recipe book and Creative inventory searching, especially when using mods.
  • Namespaces (e.g minecraft:stone) are no longer considered for searching.
• Optimized chunk loading, as the previous pre-release slowed it down.

Fixes

46 issues fixed

From released versions before Java Edition 1.12

• MC-12503 – Item Description is rendered behind Potion Effect Status in Inventory
• MC-40275 – Credit screen/End Poem music not playing correctly
• MC-94016 – Glass panes and iron bars connect to barrier blocks
• MC-109871 – Some advanced tooltips are not translatable
• MC-112602 – "disconnect.spam" kick message is untranslated
• MC-116489 – Unknown entity property for entity_properties loot table condition causes server crash for default loot tables
• MC-116669 – Exploding TNT minecarts and ender crystals can cause StackOverflow
• MC-117640 – Pets (wolves, ocelots, parrots) teleport onto magma blocks
• MC-117710 – Bonus Chest setting is not copied when re-creating world
• MC-117858 – Right-clicking an item stack into the creative mode item selector destroys the whole stack

From the Java Edition 1.12 development versions

• MC-115816 – During the destruction of the beds, cracks do not appear
• MC-116479 – Parrots dismount when y coordinate decreases
• MC-116625 – Animation speed of Crafting Guide items is dependant on framerate.
• MC-116696 – Animated textures in resource packs aren't animated in advancement icons
• MC-116834 – "Showing Craftable" button shows uncraftable items of same recipe group
• MC-117004 – Narrator is toggled when typing in text fields
• MC-117125 – Narrator still crashes on linux, flite installed
• MC-117265 – Typing in search bar in recipe book displays next variant for recipes with multiple variants
• MC-117310 – gamerule gameLoopFunction does not tab complete function names
• MC-117314 – stat.craftItem is missing most items
• MC-117568 – Survival tutorial steps shown in creative mode
• MC-117584 – Converting zombie villager without ConversionPlayer set crashes server
• MC-117611 – Extreme Lag on Multiplayer Server
• MC-117627 – Moving items in inventory with open recipe book displays next variant for recipes with multiple variants
• MC-117636 – construct_beacon advancement trigger is triggered when player gets near beacon instead of when building beacon
• MC-117661 – Conditional function command only runs the function if the selection matches exactly one entity
• MC-117663 – Conditional function commands do not work inside of functions
• MC-117677 – Jumping does not increase progress in tutorial
• MC-117687 – Recipe Book tries to use damaged bows to craft dispensers despite this being invalid

From the previous development version

• MC-117703 – Cannot kill invulnerable parrot with cookie in Creative mode
• MC-117704 – "excitedze" easter egg triggers when language is already "Pirate Speak"
• MC-117713 – skipping function triggers conditional command blocks
• MC-117714 – Clicking on dispenser recipe while only having enchanted bow in inventory places other ingredients anyways
• MC-117718 – Breeding animals without LoveCause set cause crash
• MC-117727 – @s is described as "a player in /execute" despite working for all entities
• MC-117752 – Knowledge book isn't consumed upon right-click
• MC-117785 – Clicking arrows in recipe book have no click sound
• MC-117789 – Crash: java.lang.IllegalAccessError: tried to access field com.sun.jna.Pointer.peer from class com.sun.jna.PointerTool
• MC-117812 – Weird criteria names in certain advancements
• MC-117823 – Single-ingredient recipes cannot be stacked by repeatedly clicking on the recipe
• MC-117827 – Nonexistent (or misnamed) tipped arrow recipe
• MC-117843 – Parrots lose their Name Tag upon dismounting a player's shoulder
• MC-117854 – Fences connect to barriers
• MC-117877 – Naming Parrots, becoming unnamed.
• MC-117883 – Advancement descriptions are able to go out of the Minecraft window
• MC-117960 – Strange vines behavior

1.12-pre7

1.12-pre7 is the seventh and final pre-release for Java Edition 1.12, released on May 31, 2017, which adds new splashes and experience rewards to advancements.

Additions

Advancements

• Added experience rewards to all "challenge" advancements

Splashes

• "The true meaning of covfefe"
  • Reference to a cryptic tweet from Donald Trump
• "An illusion! What are you hiding?"
• "Something's not quite right..."
  • The top two are references to Suramar City guards in World of Warcraft, who say these lines when a player, having an illusion on themself, goes nearby
  • The splash about the illusion could also be a reference to the illusioner.

Fixes

9 issues fixed

From released versions before Java Edition 1.12

• MC-59535 – Server log outputs TextComponent object rather than its Text property for player lost connection/Disconnecting message

From the Java Edition 1.12 development versions

• MC-117764 – No error is logged when using knowledge book with invalid recipes
• MC-118002 – Pausing game while moving causes screen shaking
• MC-118021 – Parrot spawn egg appears after rabbit spawn egg in English (US)
• MC-118036 – Disconnecting from server prints TranslatableComponent in log
• MC-118038 – Crafting items with no recipe file shows empty toast
• MC-118057 – Unexpectedly high CPU usage in menus
• MC-118067 – Pressing T in Spectator mode allows you to use recipe book search
• MC-118068 – Recipe book uses always T for focusing search