Unity Issue Tracker - Crash on CollectTransformsRecursive when redoing Animator's transform hierarchy optimization

Postponed means that the issue was either a feature request or something that requires major refactoring on our side. Since that makes the issue not actionable in the close future we choose to close it as Postponed and add it on our internal roadmaps and technical debt pages instead.

Postponed

Votes

0

Found in

2017.3.0a1

2018.2.0a1

2018.2.8f1

2018.3.0a1

2019.1.0a1

Issue ID

1092889

Regression

No

Crash on CollectTransformsRecursive when redoing Animator's transform hierarchy optimization

Themes

-

Oct 21, 2018

How to reproduce:
1. Open the "Animator_Redo_Crash.zip" project
2. Open the "SampleScene.unity" scene
3. Select "Crash_Model" in the Hierarchy
4. In the Inspector, press Animator settings icon > Optimize Transform Hierarchy
5. Press CTRL-Z
6. Press CTRL-Y

Actual result: Unity crashes.

Reproducible with: 2019.1.0a10, 2019.1.0a1, 2018.3.0b12, 2018.3.0a1, 2018.2.18f1, 2018.2.0a1, 2018.1.9f2, 2017.4.16f1, 2017.3.0a1.

Notes:
In 2017.4 and lower Unity throws "Could not allocate memory: System out of memory!" error.

2019.1.0a1 - 2019.1.0a3 Unity goes into an Infinite loop after pressing "Optimize Transform Hierarchy" and crashes when the computer runs out of memory.
The loop keeps logging error into editor log file:

Setting the parent of a transform which resides in a Prefab instance is not possible.
(Filename: C:/buildslave/unity/build/Runtime/Transform/Transform.cpp Line: 605)

Resolution Note:

Will be investigated as part of ongoing undo refactor

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Comments (1)

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Aug 19, 2020 13:26

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