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{{Infobox version
|title=Minecraft 18w19a
|image =18w19a.png
|image2=Java Edition 18w19a.png
|edition=Java
|type=Snapshot
|date=May 8, 2018
|parent=1.13
|prevparent=1.12.2
|nextparent=1.13.1
|clienthash=d52b2e8f15a764000c1ca6dabab4440069ff97a4
|jsonhash=cc868f094a6cdec8e1a24ed90dde12c8006e308c
|serverhash=97ad982d57fb7b7cb9dc28ffd87c79538b1901f6
|prev=18w16a
|next=18w19b
}}
<onlyinclude>

'''18w19a''' is the thirty-third [[Minecraft:snapshot]] for [[Minecraft:Java Edition 1.13]], released on May 8, 2018,<ref name="18w19a">{{snap|18w19a|May 8, 2018}}</ref> which added the [[Minecraft:Dolphin's Grace]] effect and changed some IDs, mainly to biomes.

== Additions ==
=== Gameplay ===
'''[[Minecraft:Effect]]s'''
* [[File:Dolphin's Grace JE1.png|32px]] [[Minecraft:Dolphin's Grace]].
** Acquired by swimming near [[Minecraft:dolphin]]s.
** Makes the player swim faster.

=== Fluids ===
'''[[Minecraft:Logic]]'''
* Separated some of the logic for blocks and fluids.<ref>{{tweet|Dinnerbone|987293762069155841|Trying to extract parts of BlockState into StateHolder<T> and turn BlockStateDefinition into StateDefinition<T> so I can use the same system for liquids|April 20, 2018}}</ref>
** Current fluids:
*** <code>minecraft:empty</code>
*** <code>minecraft:flowing_water</code>
*** <code>minecraft:water</code>
*** <code>minecraft:flowing_lava</code>
*** <code>minecraft:lava</code>
** The fluid at a location is currently dependent on the block at the location; currently there still are water and lava blocks. 
* Added two new fluid [[Minecraft:tag]]s: <code>minecraft:lava</code> and <code>minecraft:water</code>.
* This system is mostly internal; it cannot be directly interacted with yet.

=== World generation ===
'''[[Minecraft:Buffet]] worlds'''
* New generation type: "Caves".
** Creates [[Minecraft:Nether]]-like generation.

== Changes ==
=== Blocks ===
'''Block IDs'''
* Changed names and IDs of several [[Minecraft:block]]s:
:{| class="wikitable" data-description="Changed block names and IDs"
! Old name !! New name
|-
| <code>Sea Grass</code> || Seagrass
|-
| <code>Tall Sea Grass</code> || Tall Seagrass
|-
! Old ID !! New ID
|-
| <code>sea_grass</code> || <code>seagrass</code>
|-
| <code>tall_sea_grass</code> || <code>tall_seagrass</code>
|}

=== Items ===
'''[[Minecraft:Turtle egg]]s'''
* Changed texture.

'''[[Minecraft:Spawn egg]]s'''
* [[Minecraft:Phantom]] spawn eggs now look more like the mob's updated texture.

'''[[Minecraft:Heart of the sea]]'''
* Now generates in buried treasure chests (as stacks of 1).

'''Item IDs'''
* Changed names of several [[Minecraft:item]]s:
:{| class="wikitable" data-description="Changed item names and IDs"
! Old name !! New name
|-
| <code>Clownfish</code> || <code>Tropical Fish</code>
|-
| <code>Puffer Fish Bucket</code> || <code>Pufferfish Bucket</code>
|}

=== Mobs ===
'''[[Minecraft:Swimming]]'''
* All undead mobs (except for [[Minecraft:zombie horse]]s)<ref>{{bug|MC-129262}}</ref> now sink.
* [[Minecraft:Husk]]s morph into [[Minecraft:zombie]]s after a while if they are in water.
* [[Minecraft:Skeleton horse]]s are now rideable underwater.

'''[[Minecraft:Phantom]]s'''
* Now flap their wings smoother and faster.
* Now drop experience.

'''[[Minecraft:Parrot]]s'''
* Now imitate [[Minecraft:phantom]]s and [[Minecraft:drowned]].

'''[[Minecraft:Dolphin]]s'''
* If dolphins start drowning, they now swim to the surface.

'''[[Minecraft:Polar bear]]s'''
* Can now spawn on top of [[Minecraft:ice]].

'''[[Minecraft:Pufferfish]]'''
* Changed the name and ID of the pufferfish mob:
{| class="wikitable" data-description="Changed pufferfish name and ID"
! Old name !! New name
|-
| <code>Puffer Fish</code> || <code>Pufferfish</code>
|-
! Old ID !! New ID
|-
| <code>puffer_fish</code> || <code>pufferfish</code>
|}

=== World generation ===
'''Incompatibilities'''
* Due to changes in world generation, worlds from previous snapshots no longer work.

'''[[Minecraft:Seagrass]]'''
* Now generates in underwater caves.

=== Command format ===
'''{{cmd|seed}}'''
* The output of the command can now be copied.

=== General ===
'''Improvements'''
* Improved the upgrade paths from old versions.

'''[[Minecraft:Credits]]'''
* Updated the credits list.

'''[[Minecraft:Experience]] orbs'''
* Now floats up in water.

'''[[Minecraft:Advancement]]s'''
* "How Did We Get Here?" now includes the [[Minecraft:Conduit Power]] status effect.

'''[[Minecraft:Sounds]]'''
* New sounds for [[Minecraft:conduit]] and [[Minecraft:beacon]].

'''[[Minecraft:Debug screen]]'''
* The F3 menu now shows the biome ID, rather than name.

'''[[Minecraft:Biome]]s'''
* Changed the names of several biomes:
:{| class="wikitable collapsible collapsed" data-description="Changed biome names"
! [[Minecraft:Resource location]] !! Old name !! New name
|-
| <code>extreme_hills</code> || Extreme Hills || Mountains
|-
| <code>swampland</code> || Swampland || Swamp
|-
| <code>ice_flats</code> || Ice Plains || Snowy Tundra
|-
| <code>ice_mountains</code> || Ice Mountains || Snowy Mountains
|-
| <code>mushroom_island</code> || Mushroom Island || Mushroom Fields
|-
| <code>mushroom_island_shore</code> || Mushroom Island Shore || Mushroom Field Shore
|-
| <code>forest_hills</code> || Forest Hills || Wooded Hills
|-
| <code>smaller_extreme_hills</code> || Extreme Hills Edge || Mountain Edge
|-
| <code>stone_beach</code> || Stone Beach || Stone Shore
|-
| <code>cold_beach</code> || Cold Beach || Snowy Beach
|-
| <code>roofed_forest</code> || Roofed Forest || Dark Forest
|-
| <code>taiga_cold</code> || Cold Taiga || Snowy Taiga
|-
| <code>taiga_cold_hills</code> || Cold Taiga Hills || Snowy Taiga Hills
|-
| <code>redwood_taiga</code> || Mega Taiga || Giant Tree Taiga
|-
| <code>redwood_taiga_hills</code> || Mega Taiga Hills || Giant Tree Taiga Hills
|-
| <code>extreme_hills_with_trees</code> || Extreme Hills+ || Wooded Mountains
|-
| <code>mesa</code> || Mesa || Badlands
|-
| <code>mesa_rock</code> || Mesa Forest Plateau || Wooded Badlands Plateau
|-
| <code>mesa_clear_rock</code> || Mesa Plateau || Badlands Plateau
|-
| <code>sky_island_low</code> || The End - Floating island || Small End Islands
|-
| <code>sky_island_medium</code> || The End - Medium island || End Midlands
|-
| <code>sky_island_high</code> || The End - High island || End Highlands
|-
| <code>sky_island_barren</code> || The End - Barren island || End Barrens
|-
| <code>warm_deep_ocean</code> || Warm Deep Ocean || Deep Warm Ocean
|-
| <code>lukewarm_deep_ocean</code> || Lukewarm Deep Ocean || Deep Lukewarm Ocean
|-
| <code>cold_deep_ocean</code> || Cold Deep Ocean || Deep Cold Ocean
|-
| <code>frozen_deep_ocean</code> || Frozen Deep Ocean || Deep Frozen Ocean
|-
| <code>mutated_desert</code> || Mutated Desert || Desert Lakes
|-
| <code>mutated_extreme_hills</code> || Mutated Extreme Hills || Gravelly Mountains
|-
| <code>mutated_taiga</code> || Mutated Taiga || Taiga Mountains
|-
| <code>mutated_swampland</code> || Mutated Swampland || Swamp Hills
|-
| <code>mutated_ice_flats</code> || Ice Plains Spikes || Ice Spikes
|-
| <code>mutated_jungle</code> || Mutated Jungle || Modified Jungle
|-
| <code>mutated_jungle_edge</code> || Mutated Jungle Edge || Modified Jungle Edge
|-
| <code>mutated_birch_forest</code> || Mutated Birch Forest || Tall Birch Forest
|-
| <code>mutated_birch_forest_hills</code> || Mutated Birch Forest Hills || Tall Birch Hills
|-
| <code>mutated_roofed_forest</code> || Mutated Roofed Forest || Dark Forest Hills
|-
| <code>mutated_taiga_cold</code> || Mutated Cold Taiga || Snowy Taiga Mountains
|-
| <code>mutated_redwood_taiga</code> || Mega Spruce Taiga || Giant Spruce Taiga
|-
| <code>mutated_redwood_taiga_hills</code> || Mutated Redwood Taiga Hills || Giant Spruce Taiga Hills
|-
| <code>mutated_extreme_hills_with_trees</code> || Mutated Extreme Hills+ || Gravelly Mountains+
|-
| <code>mutated_savanna</code> || Mutated Savanna || Shattered Savanna
|-
| <code>mutated_savanna_rock</code> || Mutated Savanna Plateau || Shattered Savanna Plateau
|-
| <code>mutated_mesa</code> || Mesa (Bryce) || Eroded Badlands
|-
| <code>mutated_mesa_rock</code> || Mutated Mesa Forest Plateau || Modified Wooded Badlands Plateau
|-
| <code>mutated_mesa_clear_rock</code> || Mutated Mesa Plateau || Modified Badlands Plateau
|-
| <code>hell</code> || Hell || Nether
|}

== Fixes ==
{{fixes|fixedin=18w19a|prefix=Minecraft
|;old
| 7908 | Spawning underwater / In the middle of an (lava) ocean
| 86016 | Some Mojang staff not mentioned in credits.txt
| 118072 |Redwood Taiga Hills M Biome misnamed
|;dev
| 121285 | Crash on start when resolution is changed in profile
| 121636 | Server commands available in singleplayer with weird/bad effects
| 121661 | Typing <code>/help + unavailable command</code> returns "unexpected error" message
| 121799 | Cannot summon lightning bolt
| 121999 | Incorrect {{cmd|help}} behavior for non-ops
| 122557 | Setting the <code>size</code> parameter for the dust particle to <code>0</code> or very close to it crashes the game
| 122596 | Command autocomplete overrides command history navigation
| 122630 | {{cmd|help}} no longer prefixes "/" to commands
| 123053 | Game crashes when using an item with a tag in the <code>CanDestroy</code> or <code>CanPlaceOn</code> NBT tag
| 123606 | Server crash: Ticking entity 'java.lang.ClassCastException: ass cannot be cast to aui'
| 122632 | {{cmd|help}} entries for subcommands do not print main command prefix
| 123778 | Team color doesn't work in playerlist and sidebar before reconnecting
| 123813 | Team colors no longer show in json results
| 123835 | Colored sidebar display slots are not visible
| 123852 | Glowing effect doesn't change depending on team color
| 123856 | Clicking [Intentional Game Design] on death screen doesn't open a link to MCPE-28723
| 124091 | Team color doesn't affect name above head
| 124092 | Some team options don't work
| 124098 | jeb_ sheep don't change color
| 124102 | Book signing shows the author name as string representation of the textcomponent
| 124147 | Zombie horses are invisible and replaced with regular zombies on reload
| 124237 | Command syntax help doesn't clamp to the right chat line border
| 124560 | Server says "type help or ?" but <code>?</code> is not a valid command anymore
| 124633 | Feedback text for "<code>/team option seeFriendlyInvisibles false</code>" when <code>seeFriendlyInvisibles</code> is already disabled is wrong
| 124720 | Cannot start server with GUI
| 124750 | {{cmd|particle}} acting strangely across dimensions
| 124889 | You cannot shift click smeltable items into a furnace
| 124894 | Chests and dispenser don't spawn in structures on superflat worlds
| 124895 | Trees generate side by side
| 124898 | Minerals tab in furnace recipe book displays apple item
| 124949 | Tree generating in village house and as part of field
| 124956 | Furnace recipe book availability toggle has wrong tooltip ("Showing craftable")
| 125060 | Furnace recipe book availability toggle has crafting table icon
| 125107 | Mineshafts don't generate support blocks when a block is above it
| 125115 | Command suggestions don't order numbers from least to greatest
| 125130 | Selector auto-completion tooltips mixed up
| 125174 | Ore pockets do not generate in superflat worlds
| 125232 | Phantoms attack players in peaceful mode
| 125258 | Preparing spawn area spams 0%
| 125283 | Jungle Biomes are extremely cluttered
| 125381 | Effects from the turtle master potion don't show amplifier
| 125442 | Extreme Lag in Jungle Biome
| 125466 | Fishing drops don't come towards player
| 125550 | Experience orbs don't float up in water
| 125607 | Going inside of bubble columns in spectator mode plays bubble column sound
| 125803 | <code>NoGravity</code> no longers works on items
| 125872 | Superflat preset "the void" doesn't generate starting platform anymore
| 125915 | Zombies can destroy turtle eggs through a full block and a half above the egg
| 125946 | Phantoms can spawn inside/colliding with blocks
| 125997 | Deep Frozen Ocean isn't frozen
| 126086 | Salmon and tropical fish hitbox on land is wrongly positioned
| 126139 | The fins of dying cod and some tropical fish show z-fighting
| 126178 | Can use the water (with fish) bucket to destroy kelp, sea grass, coral and coral fan
| 126190 | Salmon mobs often get stuck
| 126198 | Only players are poisoned by pufferfish
| 126218 | Held turtle eggs are too low in first person
| 126261 | Turtle Egg Placement
| 126362 | Shift-clicking fuel into non-empty furnaces only moves fuel client-side
| 126380 | Getting an uncarved pumpkin gives recipe for jack o' lantern
| 126656 | Bubble columns made by Soul Sand only appear every other block
| 126734 | A tree inside which a village house generated generated without its trunk, possibly missing some leaves
| 126762 | Red screen when player attack invalid tropical fish variant
| 126800 | The tropical fish item is named "clownfish".
| 126815 | Banner and treasure markers on maps show incorrect icons in multiplayer
| 126859 | Polar bears and rabbits not spawning in Ice Plains
| 126950 | Riding floating boats underwater
| 127069 | huge phantom crash
| 127166 | Parrots don't imitate dolphins, phantoms and drowned
| 127253 | {{keys|F3+Q}} list isn't sorted alphabetically anymore
| 127291 | Zombies drowning always drop armor items instead of using random chance
| 127295 | Zombies can gain tridents or fishing rods when they drown
| 127337 | {{keys|F3+C}} (copy coordinates) does not copy dimension
| 127388 | Pufferfish appear with their most inflated model after world load
| 127516 | Duplication and deletion of ingredients, inventory desync and game freezing caused by faulty handling of firework star recipe
| 127593 | Waterlogged blocks such as fence sign ladder etc, will not allow bubble columns to spawn next to them
| 127924 | Slow falling is considered a negative effect
| 127969 | Sea grass doesn't generate correctly above stairs
| 127998 | You cannot place sea pickles on top of non solid blocks
| 127999 | Glitching in sea pickles when standing on them while placing the fourth one in the block
| 128039 | New Phantom skins do not match spawning egg colors
| 128242 | Leaving water while swimming causes player's arm to render out of screen
| 128264 | Mobs can spawn on regular ice
| 128285 | Dolphins summoned with <code>NoAI</code> take damage and die
| 128336 | Kelp spawns on trapdoors, stairs, slabs and chests on sunken ships
| 128463 | The "How Did We Get Here" advancement does not require Conduit Power
| 128557 | Drowning dolphins don't swim to the surface.
|;previous
| 128666 | Flowing water above magma blocks turns into bubble columns
| 128674 | Buffet End island puts you in the void
| 128712 | Phantoms don't drop experience when killed by player
| 128733 | The ice block tag is missing <code>frosted_ice</code>
| 128766 | Blue ice doesn't mine fast using pickaxe
| 128779 | "Debug Mode" comes before "Buffet" in the world creation menu
| 128857 | Sea pickles change hitbox when increasing count, but turtle eggs don't
| 129143 | The {{keys|F3}} menu shows the translated biome name, rather than ID.
|;Private issues
| 122684 | Connected LAN players are able to kick/ban the server host<ref name=18w19a/>
| 127274 | {{keys|F3+C}} to copy coordinates works even when reduced debug info is enabled<ref name=18w19a/>
}}</onlyinclude>

== Videos ==
{{slicedlime|Nzr5VLP3D8c}}

== Trivia ==
* Unlike most of the first-of-the-week snapshots, this was released on a Tuesday instead of Wednesday.

== References ==
{{reflist}}

== Navigation ==
{{Navbox Java Edition versions|1.1x}}

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[[Minecraft:zh:Java版18w19a]]

Minecraft:Java Edition 18w19a - Revision history

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