[MC-131014] Observers and block states not updated by tree growth

The bug

Observers do not update upon tree growth unless they were already observing the sapling.

Demonstration

Also, block states are not updated properly, for example fences do not start connecting.

[media]

Code Analysis

A code analysis by @unknown can be found in this comment in MC-136442.

Linked issues

is duplicated by 5

MC-134566 Observer doesn't detect tree growth anymore. Resolved

MC-136485 Observer blocks not detecting tree leaves Resolved

MC-136787 Observer blocks no longer recognize leaf blocks? Resolved

MC-137001 Leaves do not detect when a tree is grown Resolved

MC-137270 Fences, glass panes, iron bars, etc. don't attach to new grown tree Resolved

relates to 4

MC-176644 Observers don't trigger when a fence connects to a newly grown tree Resolved

MC-136442 Blocks of giant mushrooms don't send block updates after growing Resolved

MC-168913 Observers do not detect changes in a leave's block distance from nearest stump, when updated by a sapling growing into a tree Resolved

MC-180771 Observer not updating when tree grows leaves in front of it Resolved

Attachments

2018-08-25 15-27-40.mp4

Comments 29

Ely G 2018-06-07T05:05:39Z

This does not affect 1.12.2

TheEliteFriendsYT 2018-06-07T07:05:44Z

I tested it out on 1.13-pre-1 and it worked, it even captured the sapling growth stages!

Ely G 2018-06-07T12:52:51Z

See the gif; it works with the sapling; it doesn't work with the log above the sapling

[Mod] Neko 2018-06-07T23:05:22Z

Can confirm.

CreonC 2018-07-13T15:06:21Z

note*piz do not mark unreleased version,you don't have access to the game version.

19 more comments

Ely G 2018-07-13T15:07:50Z

...Except I have access to 1.13pre8?

Pär-Erik Segolsson 2018-07-16T18:07:21Z

Can confirm, Observer does not see block Update of tree’s growing. 1.13(pre8)

HalfSlabBacon 2018-07-24T07:12:04Z

Confirmed in 1.13 stable, my poor tree farm is now useless.

user-f2760 2018-07-24T07:23:37Z

That's already marked as affected...

Louis Grasset 2018-09-11T09:26:02Z

Getting the same with 1.13.1

lord.quadrato 2018-09-11T13:07:14Z

@unknown 1.13.1 is already marked as affected

Brandon Blackmer 2018-10-19T04:28:29Z

I hope they will fix this bug in the next few updates

Ely G 2018-10-19T04:35:08Z

Me too. Personally, I think there should be updates dedicated only to bug fixes, but I don't control the update schedule so what can you do :/

Antonio Cavrić 2018-12-04T20:10:50Z

1.13.2 still same problem. any idea on the solution?

RemcoW 2018-12-06T10:42:07Z

Bug has been open for half a year now, is it possible to get a progress report or escalate the priority of fixing this?

Sunroses 2018-12-07T18:27:17Z

someone who's good with minecraft code help me budget this my tree farm is dying

Frilioth 2019-01-20T11:26:32Z

Confirmed. Still a bug in 19w03c

Brandon Blackmer 2019-02-22T06:01:38Z

Hey guys since this is still a problem I did find a way around it for those tree farms for right now. It can be found here: https://youtu.be/FcrRmz5x890. It will work without the smart saplings also.

ZeNico13 2019-04-03T20:14:08Z

Still in 19w13b and 19w14a

ZeNico13 2019-04-10T19:40:06Z

Still in 19w14b and 1.14 Pre-Release 1

ZeNico13 2019-04-14T23:24:32Z

Relates to MC-107664

Ely G 2019-04-19T04:57:03Z

It would be nice if this was fixed in time for 1.14

ZeNico13 2019-04-23T19:10:06Z

Still in 1.14 Release

Brandon Blackmer 2019-05-01T02:20:20Z

this is not fixed in my version of 1.14 Minecraft on Java edition....This is not resolved

Ely G 2019-05-01T04:17:13Z

It says it's fixed in a future version. This should say 1.14.1+

Ely G 2019-05-08T01:16:34Z

confirmed fixed in 1.14.1pre1

MukiTanuki 2019-05-18T05:13:12Z

This appears to still be an issue for 2x2 spruce trees in 1.14.2 pre2

Ely G 2019-05-18T05:43:49Z

I can't confirm this. It seems like 2x2 trees need the surrounding airspace in order to grow, so unfortunately I can't think of a way to test this. If you have direct evidence of this still occurring please do post it here

violine1101 2019-05-18T08:54:46Z

If 2x2 tree growth cannot be detected, please create a new ticket about that, as large trees are a special case.