What's New in Minecraft Snapshot 17w45b?

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Today Minecraft Snapshot 17w45b was released - a snapshot for Minecraft 1.13, a.k.a the "technical update". This one has a couple of small changes to reading and writing data, that can totally revolutionize command contraptions! #minecraftemployee

slicedlime works as a Tech Lead for Minecraft at Mojang, but the YouTube and Twitch channels are personal projects run entirely in his spare time.

Official announcement: https://minecraft.net/en-us/article/minecraft-snapshot-17w45a

Minecraft news playlist: https://www.youtube.com/watch?v=SEqam0f7VN8&list=PL4ZS2guXqa_jrD_9AGgzp9ZEntWkNDOsm

What's New in Minecraft 1.12? https://www.youtube.com/watch?v=M6HsqQMHuSs

The Minecraft JIRA (bug tracker): https://bugs.mojang.com/browse/MC

If you want to play this pre-release, choose the "Snapshots" profile in your launcher. Keep in mind that snapshots are unstable - they can break your world if you are unlucky - keep backups!

Changes in this version:
Merged /entitydata and /blockdata into /data:
- /data merge (block|entity)
- /data get
- /data remove

Reworked /execute
- /execute store (result|success) (score|entity|block)
- Made /execute if ... return values if used on their own
- Fixed /execute not working in functions
- Fixed execute unless always failing on entities
- Fixed execute on multiple entities canceling once one command fails
- Fixed the order in which execute runs the command for each entity being in reverse

Selectors:
- Fixed being unable to use namespace in type= for selectors
- Fixed @s failing to build valid commands
- Fixed the distance argument being unable to find players with @a, @p or @e[type=player]
- Fixed @a or @s not including dead player

Scoreboard:
- Fixed - -= being an invalid operation in scoreboard players operation
- Fixed removing scoreboard points adding them

Teleport:
- Fixed /teleport with rotation not working
- Fixed only players being able to teleport with relative coordinates

Other fixes:
- Made command-function loading much faster
- Fixed "optional" commands following conditional execute chain succeeding or failing strangely
- Fixed some creative commands being available to survival players with cheats disabled
- Fixed gamerules copying from other worlds
- Fixed tellraw only supporting 1 target

Messages:
- Fixed tab auto-completion being case-sensitive
- Fixed an incorrect message when teleporting a single entity
- Fixed an incorrect failed /fill result message
- Fixrd an incorrect result message when teleporting a single entity

Music: "Blue Forest" and "Outpost" by Crinkles (http://http://crinklesmusic.com/) licensed under Creative Commons: By Attribution 4.0 (http://creativecommons.org/licenses/by/4.0/)

Outro music "The Fire" by Amarante (http://amarante.bandcamp.com) licensed under Creative Commons: By Attribution 3.0 (http://creativecommons.org/licenses/by/3.0/)

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