[MC-170951] Cannot teleport entities outside of the world

How to reproduce

Run this command to teleport yourself below bedrock
```
/tp @s ~ -1 ~
```
Notice you don't get teleported and you get "Invalid position for teleport"

Why we need this: a lot of data packs use this feature to remove mobs without the death animation showing as well as preventing sounds, item drops, slimes splitting, etc.

Linked issues

is duplicated by 2

MC-171775 /teleport no longer allows a player to teleport below Y layer 0. Resolved

MC-172072 /teleport no longer allows an entity to teleport above Y layer 255 NOT A DUPLICATE!!!!!!!!!!!!!!!!!!!!!!!!!! Resolved

relates to 2

MC-123587 Kicked from the game when reaching y levels over 30,000,000 Resolved

MC-172374 Can teleport to invalid y coordinates and crash the game Resolved

Attachments

Comments 3

DinoTimes 2020-02-05T21:06:49Z

if you mine down and mine the bedrock and go bellow then you do /tp @s ~ ~ ~ then it still says the error message

Arcensoth 2020-02-05T21:14:22Z

The ability to teleport entities into the void has been a common technique for years. Having it removed from the game and failing with an error is a significant breaking change for commands/datapacks.

I'd suggest a new "super kill" command that immediately disposes of entities without any of the aforementioned side-effects, but that still wouldn't fix all of the outdated datapacks.

onnowhere 2020-02-05T21:16:02Z

This did not occur in 1.15. Apparently this was as a side effect of a bug fix for teleporting to coordinates that are too large causing a crash, which may have led the fix to limit negative y as well, which should not be necessary as it isn't a large number.