Particle instance modifier can crash when create from Children is checked and Normal is not #53151

New Issue

Peter Sampson · 2017-10-25T03:12:11+02:00

Peter Sampson commented

2017-10-25 03:12:11 +02:00

System Information
OSX 10.11.6, xeon w3680 6core 12thread
system-info.txt
Blender Version
2.69.7 5bd8ac9
also Nightly 2.79 34fe3f9c06

Short description of error
Using a particle instance modifier with Children checked and Normal not checked and then attempting to change certain parameters of the particle system such as in the velocity or children tabs causes a crash. Enabling Normal in the particle instance modifier prevents this from happening.
Exact steps for others to reproduce the error
Create a Plane with a hair type particle system.
Create a cube with a particle instance modifier and set the object to the Plane with the particle system.
Check the box for Children and uncheck the box for Normal.
Go to the particle system on the Plane and check Advanced.
Drag any of the values in Velocity or Children and soon it will crash.
Crash_ParticleInstance.zip

**System Information** OSX 10.11.6, xeon w3680 6core 12thread [system-info.txt](https://archive.blender.org/developer/F1064374/system-info.txt) **Blender Version** 2.69.7 5bd8ac9 also Nightly 2.79 34fe3f9c069 **Short description of error** Using a particle instance modifier with Children checked and Normal not checked and then attempting to change certain parameters of the particle system such as in the velocity or children tabs causes a crash. Enabling Normal in the particle instance modifier prevents this from happening. **Exact steps for others to reproduce the error** Create a Plane with a hair type particle system. Create a cube with a particle instance modifier and set the object to the Plane with the particle system. Check the box for Children and uncheck the box for Normal. Go to the particle system on the Plane and check Advanced. Drag any of the values in Velocity or Children and soon it will crash. [Crash_ParticleInstance.zip](https://archive.blender.org/developer/F1064389/Crash_ParticleInstance.zip)

Peter Sampson commented

2017-10-25 03:12:11 +02:00

Changed status to: 'Open'

Peter Sampson commented

2017-10-25 03:12:11 +02:00

Added subscriber: @Peter-Sampson

ronan ducluzeau commented

2017-10-25 11:54:09 +02:00

Added subscriber: @zeauro

ronan ducluzeau commented

2017-10-25 11:54:09 +02:00

I had an instant crash with attached .blend and master 6ec8344 under ubuntu 16.04 64bits.
But I have no problem with official 2.79. And I did not manage to reproduce from scratch.

No problem with master launched with factory settings.
It may be related to an addon or a preference.

I don't really understand why but I have to disable Cuda device for Cycles to be able to open blend file. Then, I have no crash.
Maybe it is related to hair changes.

I had an instant crash with attached .blend and master 6ec8344 under ubuntu 16.04 64bits. But I have no problem with official 2.79. And I did not manage to reproduce from scratch. No problem with master launched with factory settings. It may be related to an addon or a preference. I don't really understand why but I have to disable Cuda device for Cycles to be able to open blend file. Then, I have no crash. Maybe it is related to hair changes.

Bastien Montagne commented

2017-10-31 11:44:09 +01:00

Added subscriber: @mont29

Bastien Montagne self-assigned this 2017-10-31 11:44:09 +01:00

Bastien Montagne commented

2017-10-31 11:44:09 +01:00

Yeah, I can confirm the crash here too… will try to investigate what exactly happens here, it's not immediately clear from ASAN report :/

Bastien Montagne was unassigned by Dalai Felinto

2019-12-23 16:36:28 +01:00

Germano Cavalcante commented

2020-01-24 14:56:22 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-01-24 14:56:22 +01:00

I tested it on blender 2.83.
I managed to crash once by changing the properties of childrens, but I can't do it again no matter how hard I try.
I will mark this as Known Issue as there are plans to refactoring this area in the near future.

I tested it on blender 2.83. I managed to crash once by changing the properties of childrens, but I can't do it again no matter how hard I try. I will mark this as `Known Issue` as there are plans to refactoring this area in the near future.

Philipp Oeser removed the

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Particle instance modifier can crash when create from Children is checked and Normal is not #53151