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Won't Fix

Unknown (hidden) 2019.4.X, 2020.1.X

Votes

0

Found in

2019.4.39f1

2020.1.0a19

Issue ID

UUM-11862

Regression

No

GameObject not disbled when changing the sibling order inside OnDisable

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1. What happened
If we change the sibiling order of an object inside OnDisable, it can cause that some objects aren't disabled during DestroyObject.
This leads to a lot of undefined behaviours.

This is due to how we iterate the objects in https://github.cds.internal.unity3d.com/unity/unity/blob/93a364f095f55c0e7616dc8d1638d6c6c37b5ad5/Runtime/BaseClasses/GameObject.cpp#L212

2. How we can reproduce it using the example you attached
- Open SampleScene
- Enter play mode

Expected behaviour:
- Both objects log from OnDisable

Actual Behaviour:
- Only Child1 logs from OnDisable
- The editor might crash due to trying to destroy an enabled GameObject

  1. Resolution Note:

    The bug is not reproducible in Version: 2020.3.40f1 which is now the legacy LTS.

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