Java Edition 16w42a

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 "field": "October 19, 2016",
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 "field": "[https://piston-data.mojang.com/v1/objects/3742e2ccb78ef02f1820f7dc73f5aafcf8c213a8/client.jar Client] ([https://piston-meta.mojang.com/v1/packages/6ffff59eb02a4fef3c6aee893136858606832183/16w42a.json .json])<br />[https://piston-data.mojang.com/v1/objects/ad6aa39daf88864fcd84b231638e3dc28bde83f3/server.jar Server]",
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 "label": "<span style=\"white-space: normal;\">(link to Pack format#List of pack formats article, displayed as Resource pack format)</span>"
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 "field": "<span class=\"plainlinks\">[https://en.wikipedia.org/wiki/Java_version_history#Java_SE_6 Java SE 6]</span>",
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 "footer": "<table style=\"margin: auto; word-break: break-word;\">\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\" >[[Java Edition 1.10.2|<span style=\"margin-right:-0.35em\">◄</span>◄  1.10.2]]</td>\n<td style=\"padding: 0.4em\">'''[[Java Edition 1.11|1.11]]'''</td>\n<td style=\"padding: 0.4em\" >[[Java Edition 1.11.1| 1.11.1 <span style=\"margin-right:-0.35em\">►</span>►]]</td>\n</tr>\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\">\n[[Java Edition 16w41a|◄  16w41a]]\n</td>\n<td style=\"padding: 0.4em\">''' 16w42a'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 16w43a| 16w43a ►]]\n</td>\n</tr>\n</table>"
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16w42a is the twelfth snapshot for Java Edition 1.11, released on October 19, 2016^[2] mainly to fix a bunch of bugs and crashes.

Arrows

• Now have a crit tag which determines whether the arrow deals critical hit damage.

Vexes

• Now do more damage - their attack damage on Easy has been increased from 3HP👁 ❤️
  👁 💔
  to 5HP👁 ❤️
  👁 ❤️
  👁 💔
  , on Normal 4HP👁 ❤️
  👁 ❤️
  to 9HP👁 ❤️
  👁 ❤️
  👁 ❤️
  👁 ❤️
  👁 💔
  , and on Hard 6HP👁 ❤️
  👁 ❤️
  👁 ❤️
  to 13HP👁 ❤️
  × 6.5.

37 issues fixed

From released versions before 1.11

• MC-3367 – Reflecting ghast fireballs is nearly impossible.
• MC-12788 – Custom superflat world GUI graphical glitch with chests/ender chests / trapped chests/beacon blocks,
• MC-46309 – Command feedback doesn't work with @e and no mobs which match the selector.
• MC-46345 – Maps stop updating after going through nether portal / Map update packets ignored by client.
• MC-50156 – WitherSkull / fireball disappears at y >~ 256.
• MC-58795 – Spectator mode teleportation to team member causes crash.
• MC-59144 – A held item replaced by the same kind of item by /replaceitem does not visually update.
• MC-64119 – stat.drop won't increase when player throws items out of their inventory screen.
• MC-73205 – FallingSand glitches upwards.
• MC-79318 – Double piston extender: sand on top falling in between pistons.
• MC-80549 – Slime /entitydata motion causing unkillable slime.
• MC-81731 – Dropped items are doubled in Creative, Survival inventory.
• MC-86163 – When hostile mobs hit you while blocking with shield, sound of taking damage is not played.
• MC-88089 – Two players going down a ladder at the same time makes them stuck or go up.
• MC-90175 – Game crashes with exit code -805306369 (out of memory?) when boats are summoned as a passenger of a boat that is a passenger of a living entity.
• MC-92106 – ThrownPotion not using particles from CustomPotionEffects tag.
• MC-95735 – (Splash) harming and healing potion still applies effect even if it's specified not to.
• MC-97360 – Hitting a bed, sign, or banner displays the "Block broken" caption instead of "Block breaking".
• MC-97692 – Boat riding on an entity riding on an entity.
• MC-98727 – Standing on a boat starves the player extremely quickly.
• MC-99763 – /help command not suggesting tab completion when executed from other entity.
• MC-100260 – Explosion impulse on non-living entities is not attenuated by power, distance, or obstructions.
• MC-102986 – Can place Grass Path at "invalid" locations.
• MC-105845 – Memory usage graph of server GUI not drawing.
• MC-107138 – Shot arrow loses its critical state after reloading.
• MC-108253 – Zombie villagers despawn.
• MC-108664 – Witches that spawn in witch huts don't have PersistenceRequired set to 1.
• MC-108748 – Can't trade with villagers while holding a spawn egg.

From the 1.11 development versions

• MC-108081 – Item name shown in /give command feedback has no hoverEvent.
• MC-108351 – No play placed sound and subtitles, when placing blocks on cake.
• MC-108405 – Maps break after leaving the End.

From the previous development version

• MC-108676 – Skeletons and wither skeletons can spawn anywhere in the Nether.
• MC-108685 – The corners of the offhand hotbar slot have transparent textures.
• MC-108718 – Illagers and Vexes not randomly looking at the player when not aggressed.
• MC-108727 – Thorns enchantment has no effect on vexes.
• MC-108729 – When giving yourself items with negative durability, the game crashes.
• MC-108752 – Elder Guardians spawned from spawn egg/command do not have full health.

• 16w42a was previously removed from the launcher for some time, but was added back in September 2018.