[MC-245602] Cloning a command block infinitely clones itself

When a command block contains a command to clone itself into a new location, the command re-triggers indefinitely, executing the clone over and over again. This occurs in 1.18, but not in 1.17.

Reproduction

Place a command block
Type in the command
```
clone ~ ~ ~ ~ ~ ~ ~ ~2 ~
```
Place a button on the command block
Press the button

Expected Outcome
The command block is cloned with the command two spaces above the original block.

Actual Outcome
The command block is cloned infinitely upwards every other block (see screenshot).

Linked issues

is duplicated by 1

MC-231492 Cloning area's can overlap using the command blocks. Resolved

Attachments

Comments 6

Avoma 2021-12-16T15:02:44Z

I believe that this is working as intended, since MC-49010 was fixed in 21w43a.

Timothy Foster 2021-12-17T00:02:21Z

I did see that bug was fixed, but I'm not sure why that would imply command block should re-trigger themselves upon being cloned. These feel like different, albeit maybe related, issues to me.

user-39c63 2022-01-03T23:02:50Z

Can confirm as of 1.18.1

Moesh 2022-01-19T11:04:06Z

Can reproduce this in 1.17.1. This is WAI.

boq 2022-01-19T11:24:10Z

Note: to test 1.17 command has to be changed to
clone ~ ~ ~ ~1 ~1 ~1 ~ ~2 ~
What changed in this version is that game no longer (incorrectly) skips some ticks when cloning (basically, off-by-one bug)

Peter Bar 2024-08-25T17:10:37Z

The issue is still there in 1.21
Is this really supposed to be WAI? infinite cloning by the command block itself makes various vehicles exploiting the "masked move" option impossible to create. I think in versions before 1.18 it worked normally, now it's broken, so the issue is NOT resolved.