Blender freezes when deleting or unparenting nurbs path (hangs in particle collision detection) #89608

New Issue

rohan stevenson · 2021-07-02T16:54:53+02:00

rohan stevenson commented

2021-07-02 16:54:53 +02:00

System Information
Operating system: macOS-10.14.6-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon RX 570 OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.25

Blender Version
Broken: version: 2.93.1, branch: master, commit date: 2021-06-22 05:57, hash: 1b8d33b18c
Worked: (newest version of Blender that worked as expected)

Short description of error
Blender will hang if attempting to delete or unparent empty controlling this model that is parented to the curbs path.

Exact steps for others to reproduce the error

Open attached blend file.
Delete nurbs path

Result = Blender will hang.

Attempt to remove parenting to nurbs path by selecting object properties of the Empty "Nautilus Empty v2".

Result = Blender will hang.

N.B. - The file is simplified as much as possible. The collection "Nautilus" was appended into a brand new Blend file.

Blender Hangs Deleting Nurbs Path.blend.zip

**System Information** Operating system: macOS-10.14.6-x86_64-i386-64bit 64 Bits Graphics card: AMD Radeon RX 570 OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.25 **Blender Version** Broken: version: 2.93.1, branch: master, commit date: 2021-06-22 05:57, hash: `1b8d33b18c` Worked: (newest version of Blender that worked as expected) **Short description of error** Blender will hang if attempting to delete or unparent empty controlling this model that is parented to the curbs path. **Exact steps for others to reproduce the error** 1. Open attached blend file. 2. Delete nurbs path Result = Blender will hang. 3. Attempt to remove parenting to nurbs path by selecting object properties of the Empty "Nautilus Empty v2". Result = Blender will hang. N.B. - The file is simplified as much as possible. The collection "Nautilus" was appended into a brand new Blend file. [Blender Hangs Deleting Nurbs Path.blend.zip](https://archive.blender.org/developer/F10209670/Blender_Hangs_Deleting_Nurbs_Path.blend.zip) ![image.png](https://archive.blender.org/developer/F10211830/image.png)

rohan stevenson commented

2021-07-02 16:54:53 +02:00

Added subscriber: @rohan.stevenson

Philipp Oeser commented

2021-07-05 11:10:52 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-07-05 11:10:52 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Philipp Oeser commented

2021-07-05 11:10:52 +02:00

Can confirm.
Hangs when trying to determine collisions, does not happen without the particle systems

Can confirm. Hangs when trying to determine collisions, does not happen without the particle systems ![image.png](https://archive.blender.org/developer/F10211830/image.png)

Philipp Oeser changed title from ~~Blender Hangs When Deleting or Unparenting Nurbs Path~~ to Blender freezes when deleting or unparenting nurbs path (hangs in particle collision detection)

2021-07-05 11:11:52 +02:00

rohan stevenson commented

2021-07-05 11:43:56 +02:00

Ah. Particles again. I should have thought of that....and in fact I did when working around the problem.

Dalai Felinto commented

2022-05-09 15:17:14 +02:00

Added subscriber: @dfelinto

Dalai Felinto commented

2022-05-09 15:17:14 +02:00

Thanks for the report. Marking this as known issue since it depends on the old particle settings which is end of life .

Thanks for the report. Marking this as known issue since it depends on the [old particle settings which is end of life ](https://developer.blender.org/tag/nodes_physics/).

Philipp Oeser removed the

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Blender freezes when deleting or unparenting nurbs path (hangs in particle collision detection) #89608