[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 5

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

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

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

MC-107664 Some events / actions do not trigger observers Open

Attachments

Comments 29

migrated 2018-06-07T05:05:39Z

This does not affect 1.12.2

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

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

migrated 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

migrated 2019-05-01T04:17:13Z

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

migrated 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

migrated 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

[Mod] 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.