Blender 2.92 crashing when editing fractured mesh #84134

New Issue

yves bodson · 2020-12-25T17:41:58+01:00

yves bodson commented

2020-12-25 17:41:58 +01:00

System Information
Operating system: Linux-5.4.0-58-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.80.02

Blender Version
Broken: version:

2.92.0 Alpha, branch: master, commit date: 2020-12-24 19:11, hash: af316d2761
2.91.0
2.90.1
2.83.10
Worked: ?

Short description of error
I have used cell fracture to fracture a UV sphere. I did separate the parts using P. I tried to edit a part and it is where the crash happens.

/home/yves/Downloads/blender291/blender(BLI_system_backtrace+0x20) [0x84ba490]
/home/yves/Downloads/blender291/blender() [0xe5293a]
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7fa720a5e210]
/home/yves/Downloads/blender291/blender(DRW_mesh_batch_cache_create_requested+0x5a9) [0x1364e89]
/home/yves/Downloads/blender291/blender() [0x1311158]
/home/yves/Downloads/blender291/blender(DRW_draw_render_loop_ex+0x35d) [0x131232d]
/home/yves/Downloads/blender291/blender(view3d_main_region_draw+0x8f) [0x1afb15f]
/home/yves/Downloads/blender291/blender(ED_region_do_draw+0x7e1) [0x16b43f1]
/home/yves/Downloads/blender291/blender(wm_draw_update+0x52e) [0x11c181e]
/home/yves/Downloads/blender291/blender(WM_main+0x30) [0x11bf740]
/home/yves/Downloads/blender291/blender(main+0x30d) [0xd8d12d]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7fa720a3f0b3]
/home/yves/Downloads/blender291/blender() [0xe4f0b3]

{F9530087}

{F9530088}

Exact steps for others to reproduce the error

Open the attached file and select Sphere_cell.055.
Try to switch to edit mode.

**System Information** Operating system: Linux-5.4.0-58-generic-x86_64-with-debian-bullseye-sid 64 Bits Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.80.02 **Blender Version** Broken: version: - 2.92.0 Alpha, branch: master, commit date: 2020-12-24 19:11, hash: `af316d2761` - 2.91.0 - 2.90.1 - 2.83.10 Worked: ? **Short description of error** I have used cell fracture to fracture a UV sphere. I did separate the parts using P. I tried to edit a part and it is where the crash happens. ```lines /home/yves/Downloads/blender291/blender(BLI_system_backtrace+0x20) [0x84ba490] /home/yves/Downloads/blender291/blender() [0xe5293a] /lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7fa720a5e210] /home/yves/Downloads/blender291/blender(DRW_mesh_batch_cache_create_requested+0x5a9) [0x1364e89] /home/yves/Downloads/blender291/blender() [0x1311158] /home/yves/Downloads/blender291/blender(DRW_draw_render_loop_ex+0x35d) [0x131232d] /home/yves/Downloads/blender291/blender(view3d_main_region_draw+0x8f) [0x1afb15f] /home/yves/Downloads/blender291/blender(ED_region_do_draw+0x7e1) [0x16b43f1] /home/yves/Downloads/blender291/blender(wm_draw_update+0x52e) [0x11c181e] /home/yves/Downloads/blender291/blender(WM_main+0x30) [0x11bf740] /home/yves/Downloads/blender291/blender(main+0x30d) [0xd8d12d] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7fa720a3f0b3] /home/yves/Downloads/blender291/blender() [0xe4f0b3] ``` {F9530087} {F9530088} **Exact steps for others to reproduce the error** - Open the attached file and select `Sphere_cell.055`. - Try to switch to edit mode.

yves bodson commented

2020-12-25 17:41:58 +01:00

Added subscriber: @YvesBodson

yves bodson commented

2020-12-25 17:46:03 +01:00

I am testing cell fracture addon and this could be the origin of the crash. Blender bail out dry when trying to enter in edit mode on a part of the fractured object. Before I have used the P to separate elements.
Could it be the attached force field that is the cause?
Anyway..

I am testing cell fracture addon and this could be the origin of the crash. Blender bail out dry when trying to enter in edit mode on a part of the fractured object. Before I have used the P to separate elements. Could it be the attached force field that is the cause? Anyway..

Evan Wilson commented

2020-12-25 23:42:11 +01:00

Added subscriber: @EAW

Evan Wilson commented

2020-12-25 23:42:11 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Evan Wilson commented

2020-12-25 23:42:11 +01:00

Writing: /tmp/292 Covid fractured _01.crash.txt

Could you upload the crash.txt file please?

>Writing: /tmp/292 Covid fractured _01.crash.txt Could you upload the crash.txt file please?

yves bodson commented

2020-12-26 06:42:28 +01:00

Sorry I missed it.. Here it is
291 2021 Wishes no sources _01-03.crash.txt

292 Covid fractured _01.crash.txt

Sorry I missed it.. Here it is [291 2021 Wishes no sources _01-03.crash.txt](https://archive.blender.org/developer/F9530576/291_2021_Wishes_no_sources__01-03.crash.txt) [292 Covid fractured _01.crash.txt](https://archive.blender.org/developer/F9530577/292_Covid_fractured__01.crash.txt)

Evan Wilson commented

2020-12-26 10:22:04 +01:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Evan Wilson commented

2020-12-26 10:22:04 +01:00

Thank you.

Robert Guetzkow commented

2020-12-28 12:02:37 +01:00

Added subscriber: @rjg

Robert Guetzkow commented

2020-12-28 12:02:37 +01:00

I can reproduce the crash in all version from 2.92 to 2.83.10. The project has plenty dependency cycles. If I remove either the rigid body from one of the Sphere_cell objects (e.g. Sphere_cell.055) or the particle system, then I can switch to edit mode on that object without issues. The crash only happens on objects that have both the rigid body and particle system.

I can reproduce the crash in all version from 2.92 to 2.83.10. The project has plenty dependency cycles. If I remove either the rigid body from one of the `Sphere_cell` objects (e.g. `Sphere_cell.055`) or the particle system, then I can switch to edit mode on that object without issues. The crash only happens on objects that have both the rigid body and particle system.

Robert Guetzkow commented

2020-12-28 12:11:35 +01:00

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

Robert Guetzkow commented

2020-12-28 12:11:35 +01:00

I'm confirming this ticket for now as the setup shouldn't crash Blender, even when it might not be correctly setup.

Robert Guetzkow commented

2020-12-28 12:20:55 +01:00

Removing the force field also prevents the crash.

yves bodson commented

2020-12-28 14:10:24 +01:00

Hi Robert
You're right about the force field. I discovered the issue after I posted the crash.
There were two and I one was causing the issue. I have removed it and it works now with the latest release as of today. 292 OK 2021 Wishes Composit COVID Fracture particles material separated Sites_01-07-08.blend
I attach the blend file I did work on this morning and it works well.
Thanks

Hi Robert You're right about the force field. I discovered the issue after I posted the crash. There were two and I one was causing the issue. I have removed it and it works now with the latest release as of today. [292 OK 2021 Wishes Composit COVID Fracture particles material separated Sites_01-07-08.blend](https://archive.blender.org/developer/F9533908/292_OK_2021_Wishes_Composit_COVID_Fracture_particles_material_separated_Sites_01-07-08.blend) I attach the blend file I did work on this morning and it works well. Thanks

Jacques Lucke commented

2021-01-04 14:04:25 +01:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2021-01-04 14:04:25 +01:00

I can reproduce the crash.

The issue seems to be that BKE_object_handle_data_update is not called on the object that goes to edit mode. Therefore, its final mesh is never generated and that results in the crash during rendering. I noticed that BKE_object_handle_data_update is called on another object instead.

My best guess is that the depsgraph is confused due to all the dependency cycles and ends up not evaluating the object at all. I haven't looked into how dependency cycles are "resolved" yet, so not sure if that is a possibility.

I can reproduce the crash. The issue seems to be that `BKE_object_handle_data_update` is not called on the object that goes to edit mode. Therefore, its final mesh is never generated and that results in the crash during rendering. I noticed that `BKE_object_handle_data_update` is called on another object instead. My best guess is that the depsgraph is confused due to all the dependency cycles and ends up not evaluating the object at all. I haven't looked into how dependency cycles are "resolved" yet, so not sure if that is a possibility.

Philipp Oeser removed the

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Blender 2.92 crashing when editing fractured mesh #84134