Crash when switching to/from Weight Paint mode #68268

New Issue

Demeter Dzadik · 2019-08-05T18:27:59+02:00

Demeter Dzadik commented

2019-08-05 18:27:59 +02:00

System Information
Operating system: Linux-5.0.0-21-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.34

Blender Version
Broken: version: 2.81 (sub 1), branch: master, commit date: 2019-08-05 13:33, hash: 8f1a55831c
Worked: Been using July 25 build for a while, so this crash must've been introduced between then and now.

Short description of error
Crashed 3 times today in the span of a few hours. The 3rd crash, which I have the stack trace for, happened when switching from edit mode to weight paint mode. The one before this was going from weight paint into object mode, and the first crash I don't remember exactly, but weight paint mode was definitely what I was switching into or out of.

Exact steps for others to reproduce the error

Open attached blend
Set undo steps in system preferences to 2
Do some weight painting on GEO-rain_body_weightpaint.001
Switch from weight paint to edit mode
isolate some selected vertices with shift+H
Switch back to weight paint mode
It should crash.

Blend:
rain_rig.blend

Trace:
weightpaintcrash

**System Information** Operating system: Linux-5.0.0-21-generic-x86_64-with-debian-buster-sid 64 Bits Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.34 **Blender Version** Broken: version: 2.81 (sub 1), branch: master, commit date: 2019-08-05 13:33, hash: `8f1a55831c` Worked: Been using July 25 build for a while, so this crash must've been introduced between then and now. **Short description of error** Crashed 3 times today in the span of a few hours. The 3rd crash, which I have the stack trace for, happened when switching from edit mode to weight paint mode. The one before this was going from weight paint into object mode, and the first crash I don't remember exactly, but weight paint mode was definitely what I was switching into or out of. **Exact steps for others to reproduce the error** - Open attached blend - Set undo steps in system preferences to 2 - Do some weight painting on `GEO-rain_body_weightpaint.001` - Switch from weight paint to edit mode - isolate some selected vertices with shift+H - Switch back to weight paint mode - It should crash. Blend: [rain_rig.blend](https://archive.blender.org/developer/F7650473/rain_rig.blend) Trace: [weightpaintcrash](https://archive.blender.org/developer/F7650471/weightpaintcrash)

Demeter Dzadik commented

2019-08-05 18:27:59 +02:00

Added subscriber: @Mets

Demeter Dzadik changed title from ~~Crash when to switching to/from Weight Paint mode~~ to Crash when switching to/from Weight Paint mode

2019-08-05 18:29:47 +02:00

Sebastian Parborg commented

2019-08-05 18:52:09 +02:00

Added subscriber: @ZedDB

Sebastian Parborg self-assigned this 2019-08-05 18:52:09 +02:00

Sebastian Parborg commented

2019-08-05 18:52:09 +02:00

We need a bit more concrete step to be able to look into this issue.
Exact steps to make it crash would be awesome to have.

We need a bit more concrete step to be able to look into this issue. Exact steps to make it crash would be awesome to have.

Demeter Dzadik commented

2019-08-06 13:07:38 +02:00

I felt a crash coming, so I saved, and I was right.

File:
rain_rig62.blend

Trace:
weightpaintcrash2

After saving, these are exactly what I did:

Switch to object mode
select GEO-rain_body_weightpaint.001
isolate selection with shift+H
enter edit mode
deselect all
select roughly the same verts that were selected before
switch to weight paint mode
crash.

But of course, it refuses to be consistently reproducible so it doesn't happen again :P

I'll keep hunting.

I felt a crash coming, so I saved, and I was right. File: [rain_rig62.blend](https://archive.blender.org/developer/F7651524/rain_rig62.blend) Trace: [weightpaintcrash2](https://archive.blender.org/developer/F7651523/weightpaintcrash2) After saving, these are exactly what I did: - Switch to object mode - select `GEO-rain_body_weightpaint.001` - isolate selection with shift+H - enter edit mode - deselect all - select roughly the same verts that were selected before - switch to weight paint mode - crash. But of course, it refuses to be consistently reproducible so it doesn't happen again :P I'll keep hunting.

Demeter Dzadik commented

2019-08-06 15:08:10 +02:00

No blend but this time I isolated some verts in edit mode before entering weight paint mode and crashing. Still can't consistently reproduce.

weightpaintcrash3

No blend but this time I isolated some verts in edit mode before entering weight paint mode and crashing. Still can't consistently reproduce. [weightpaintcrash3](https://archive.blender.org/developer/F7651609/weightpaintcrash3)

Demeter Dzadik commented

2019-08-07 12:24:34 +02:00

Unhid verts in edit mode with Alt+H, switched to weight paint mode, crash.

weightpaintcrash4

Unhid verts in edit mode with Alt+H, switched to weight paint mode, crash. [weightpaintcrash4](https://archive.blender.org/developer/F7652781/weightpaintcrash4)

Demeter Dzadik commented

2019-08-07 15:58:51 +02:00

(Upgraded to latest build today)

Isolated verts in edit mode with Shift+H, switched to weight paint mode, crash.

Starting to see a pattern emerge here, but still can't consistently do it.

weightpaintcrash5

(I might have missed the first few lines of some of the previous stack traces)

(Upgraded to latest build today) Isolated verts in edit mode with Shift+H, switched to weight paint mode, crash. Starting to see a pattern emerge here, but still can't consistently do it. [weightpaintcrash5](https://archive.blender.org/developer/F7652995/weightpaintcrash5) (I might have missed the first few lines of some of the previous stack traces)

Demeter Dzadik commented

2019-08-07 17:50:37 +02:00

Updated post with consistent reproduction steps with help from @ZedDB

Alex commented

2019-08-07 18:49:10 +02:00

Added subscriber: @SpectreFirst

Alex commented

2019-08-07 18:49:10 +02:00

I'm afraid this particular case is 100% reproducible using the same "ten clicks" trick that we used before:

Undo Steps is set to 2.
Open provided rain_rig62.blend
Click left mouse button ten times on any vertex.
Switch to Weight Paint and Blender will crash.

I can reproduce this 100% on provided file on dcad1eb03c from 2019-08-06

I'm afraid this particular case is 100% reproducible using the same "ten clicks" trick that we used before: 1. Undo Steps is set to 2. 2. Open provided rain_rig62.blend 3. Click left mouse button ten times on any vertex. 4. Switch to Weight Paint and Blender will crash. I can reproduce this 100% on provided file on dcad1eb03ccc from 2019-08-06

Sebastian Parborg removed their assignment 2019-08-07 19:13:56 +02:00

Campbell Barton was assigned by Sebastian Parborg

2019-08-07 19:13:56 +02:00

Sebastian Parborg commented

2019-08-07 19:13:56 +02:00

Added subscriber: @ideasman42

Sebastian Parborg commented

2019-08-07 19:13:56 +02:00

I can reproduce this too.

@ideasman42 it seems to be related to undo. Let me know if you need help reproducing this.

I can reproduce this too. @ideasman42 it seems to be related to undo. Let me know if you need help reproducing this.

Campbell Barton commented

2019-08-07 19:21:58 +02:00

Thanks, I can redo this. looking into it.

blender-admin commented

2019-08-07 19:51:24 +02:00

This issue was referenced by ba0870713b

This issue was referenced by ba0870713b9b563cb8fcecc9049197bf2dc3d835

Alex commented

2019-08-07 19:58:15 +02:00

Just in case, I was able to reproduce this with default Cube as well!

Undo Steps is set to 2.
Start Blender, add "Basis" and "Key 1" Shape Keys to default Cube.
Select "Key 1" and set it to 1.0.
Switch to Edit Mode. Click on any vertex 10 times.
Switch to Weight Paint.
Switch to Edit Mode.
Switch to Weight Paint, Vertex Paint or Sculpt Mode and Blender will crash.

You can even try on my simple file with a Cube – open it, switch to Weight Paint, to Edit Mode, to Weight Paint again and Blender will crash. The same trick works with Vertex Paint as well - switch to VP back and forth the same way. Sculpt Mode does this if you switch to Weight - to Edit - to Sculpt.
CrashingModesRound2.blend

Just in case, I was able to reproduce this with default Cube as well! 1. Undo Steps is set to 2. 2. Start Blender, add "Basis" and "Key 1" Shape Keys to default Cube. 3. Select "Key 1" and set it to 1.0. 4. Switch to Edit Mode. Click on any vertex 10 times. 5. Switch to Weight Paint. 6. Switch to Edit Mode. 7. Switch to Weight Paint, Vertex Paint or Sculpt Mode and Blender will crash. You can even try on my simple file with a Cube – open it, switch to Weight Paint, to Edit Mode, to Weight Paint again and Blender will crash. The same trick works with Vertex Paint as well - switch to VP back and forth the same way. Sculpt Mode does this if you switch to Weight - to Edit - to Sculpt. [CrashingModesRound2.blend](https://archive.blender.org/developer/F7653435/CrashingModesRound2.blend)

Campbell Barton commented

2019-08-07 20:37:39 +02:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2019-08-07 20:37:39 +02:00

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Crash when switching to/from Weight Paint mode #68268