BLI_assert failed: BKE_id_defgroup_list_get() #89899

New Issue

Demeter Dzadik · 2021-07-16T16:06:05+02:00

Demeter Dzadik commented

2021-07-16 16:06:05 +02:00

System Information
Operating system: Linux-5.8.0-7642-generic-x86_64-with-glibc2.32 64 Bits
Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.56

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-07-16 07:47, hash: 038345fa56
Worked: Before 3b6ee8cee7 sorry @HooglyBoogly @JacquesLucke, got another one for ya!

Short description of error
In our pipeline, we keep character hair grooming and rigging in separate files, and use an addon to combine them. Recently, the "Update Grooming" button started crashing with the following stack trace: P2257

I have hunted down the crash to this line in our code:

bpy.ops.object.data_transfer({'object': obj_from, 'selected_editable_objects': [obj_to]},
			data_type='VGROUP_WEIGHTS',
			use_create=True,
			vert_mapping='NEAREST',
			layers_select_src='ALL',
			layers_select_dst='NAME',
			mix_mode='REPLACE')

Running Blender with --threads 1 also produces the same crash, but running only this line instead of the full operator of our addon does not produce the crash.

Exact steps for others to reproduce the error

Files: id_defgroup_list_get_crash.zip
This zip includes another zip which can be installed as an addon. I also already added a bunch of prints to the addon so it's easier to see how far it gets.
With the addon enabled, open jay.rigging.blend, and click the Update Grooming button.
It should crash with the above stack trace.

grooming_crash-2021-07-16_15.51.03.mp4
Interestingly, as you see later in the video, deleting some of the objects, then pressing the Update Grooming button, then undo-ing to before the objects were deleted, and then pressing the Update Grooming button again, avoids the crash.
Yet at the same time, using the undo history to go back to "Original" still results in the crash. So that's odd.

**System Information** Operating system: Linux-5.8.0-7642-generic-x86_64-with-glibc2.32 64 Bits Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.56 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-07-16 07:47, hash: `038345fa56` Worked: Before 3b6ee8cee7080af200e25 sorry @HooglyBoogly @JacquesLucke, got another one for ya! **Short description of error** In our pipeline, we keep character hair grooming and rigging in separate files, and use an addon to combine them. Recently, the "Update Grooming" button started crashing with the following stack trace: [P2257](https://archive.blender.org/developer/P2257.txt) I have hunted down the crash to this line in our code: ``` bpy.ops.object.data_transfer({'object': obj_from, 'selected_editable_objects': [obj_to]}, data_type='VGROUP_WEIGHTS', use_create=True, vert_mapping='NEAREST', layers_select_src='ALL', layers_select_dst='NAME', mix_mode='REPLACE') ``` Running Blender with `--threads 1` also produces the same crash, but running only this line instead of the full operator of our addon does not produce the crash. **Exact steps for others to reproduce the error** - Files: [id_defgroup_list_get_crash.zip](https://archive.blender.org/developer/F10225929/id_defgroup_list_get_crash.zip) - This zip includes another zip which can be installed as an addon. I also already added a bunch of prints to the addon so it's easier to see how far it gets. - With the addon enabled, open jay.rigging.blend, and click the Update Grooming button. - It should crash with the above stack trace. [grooming_crash-2021-07-16_15.51.03.mp4](https://archive.blender.org/developer/F10225938/grooming_crash-2021-07-16_15.51.03.mp4) Interestingly, as you see later in the video, deleting some of the objects, then pressing the Update Grooming button, then undo-ing to before the objects were deleted, and then pressing the Update Grooming button again, avoids the crash. Yet at the same time, using the undo history to go back to "Original" still results in the crash. So that's odd.

Demeter Dzadik commented

2021-07-16 16:06:05 +02:00

Added subscribers: @HooglyBoogly, @JacquesLucke, @Mets

Jacques Lucke commented

2021-07-16 16:35:58 +02:00

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

Jacques Lucke commented

2021-07-16 16:35:58 +02:00

Can reproduce.
Full Backtrace: P2259

Here BKE_object_defgroup_list is called with an armature object, which does not have vertex groups.

After a simple fix for that I'm running into a different problem: P2260. Hard to tell if it is related.

Can reproduce. Full Backtrace: [P2259](https://archive.blender.org/developer/P2259.txt) Here `BKE_object_defgroup_list` is called with an armature object, which does not have vertex groups. After a simple fix for that I'm running into a different problem: [P2260](https://archive.blender.org/developer/P2260.txt). Hard to tell if it is related.

Hans Goudey self-assigned this 2021-07-16 17:54:36 +02:00

blender-admin commented

2021-07-16 18:23:55 +02:00

This issue was referenced by c4df8ac1a4

This issue was referenced by c4df8ac1a40c7a98a4244c7c14e19791b1e1e99f

Hans Goudey commented

2021-07-16 18:24:54 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Hans Goudey closed this issue

2021-07-16 18:24:54 +02:00

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BLI_assert failed: BKE_id_defgroup_list_get() #89899