Regression: Grease Pencil : multiple Line Art modifiers cause crashes #103880

New Issue

Jonathan Lanza · 2023-01-14T13:31:14+01:00

Jonathan Lanza commented

2023-01-14 13:31:14 +01:00

System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 522.30

Blender Version
Broken: version: 3.5.0 Alpha, branch: master, commit date: 2023-01-13 23:22, hash: 3a3d9488a1
Broken: 3.4.0
Worked: 3.3.2

Caused by 0aaff9a07d

Short description of error
Create 2 cubes, add the grease pencil Line Art modifier on both of them, go in camera view, turn the camera around the object or pan the camera away from the objects to crash blender.

It seems that this crash dosent happen in 3.3.2

Exact steps for others to reproduce the error
With the attached .blend file, just pan the camera up to crash blender.
line art crash.blend

NOTE: running blender with -t 1 does not crash

NOTE: getting "blender/source/blender/windowmanager/intern/wm_event_system.cc:282:22: runtime error: member access within null pointer of type 'const struct wmNotifier'" in the console

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 522.30 **Blender Version** Broken: version: 3.5.0 Alpha, branch: master, commit date: 2023-01-13 23:22, hash: `3a3d9488a1` Broken: 3.4.0 Worked: 3.3.2 Caused by 0aaff9a07d **Short description of error** Create 2 cubes, add the grease pencil Line Art modifier on both of them, go in camera view, turn the camera around the object or pan the camera away from the objects to crash blender. It seems that this crash dosent happen in 3.3.2 **Exact steps for others to reproduce the error** With the attached .blend file, just pan the camera up to crash blender. [line art crash.blend](https://archive.blender.org/developer/F14149608/line_art_crash.blend) NOTE: running blender with -t 1 does not crash NOTE: getting "blender/source/blender/windowmanager/intern/wm_event_system.cc:282:22: runtime error: member access within null pointer of type 'const struct wmNotifier'" in the console

Jonathan Lanza commented

2023-01-14 13:31:14 +01:00

Added subscriber: @BoJo

Iliya Katushenock commented

2023-01-14 13:36:40 +01:00

Added subscriber: @mod_moder

Iliya Katushenock commented

2023-01-14 13:36:40 +01:00

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

Iliya Katushenock commented

2023-01-14 13:36:40 +01:00

The failure is not regular, there is a fact of randomness.
It seems that if you quickly jerk the camera, causing the lines to completely disappear and appear, then the chances are high.
There is no stack even in debugging.

The failure is not regular, there is a fact of randomness. It seems that if you quickly jerk the camera, causing the lines to completely disappear and appear, then the chances are high. There is no stack even in debugging.

Travis commented

2023-01-14 19:23:48 +01:00

Added subscriber: @Travis-Szabo

Travis commented

2023-01-14 19:23:48 +01:00

Blender Version
Broken: version: 3.5.0 Alpha

I've just tested this one.

It happens in 3.4 as well, but not in 3.3.1

> Blender Version > Broken: version: 3.5.0 Alpha I've just tested this one. It happens in 3.4 as well, but not in 3.3.1

Jonathan Lanza commented

2023-01-14 19:37:17 +01:00

For me, once i have 2 separate objets with line art on them, it absolutely will eventually crash, sometimes i can move the camera for a few seconds, other times its crashing instantly on the smallest movement.

I found a little workaround that is interesting to take into account ; if i create multiple objetcs with some detail, then i join them all together and only THEN add the line art, the crash would not happen.

it seems the crash is only happening with multiple objects.

For me, once i have 2 separate objets with line art on them, it absolutely will eventually crash, sometimes i can move the camera for a few seconds, other times its crashing instantly on the smallest movement. I found a little workaround that is interesting to take into account ; if i create multiple objetcs with some detail, then i join them all together and only THEN add the line art, the crash would not happen. it seems the crash is only happening with multiple objects. ![joined objects.png](https://archive.blender.org/developer/F14149988/joined_objects.png)

Philipp Oeser commented

2023-01-17 14:17:23 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2023-01-17 14:17:23 +01:00

will bisect this

Philipp Oeser commented

2023-01-17 14:27:36 +01:00

Seems to be a threading issue, blender -t 1 doesnt crash

Seems to be a threading issue, `blender -t 1` doesnt crash

Philipp Oeser commented

2023-01-17 14:50:03 +01:00

Added subscriber: @ideasman42

Philipp Oeser commented

2023-01-17 14:50:03 +01:00

Caused by 0aaff9a07d

also getting this:

/blender/windowmanager/intern/wm_event_system.cc:282:22: runtime error: member access within null pointer of type 'const struct wmNotifier'
Writing: /tmp/line art crash.crash.txt

CC @ideasman42

Caused by 0aaff9a07d also getting this: ``` /blender/windowmanager/intern/wm_event_system.cc:282:22: runtime error: member access within null pointer of type 'const struct wmNotifier' Writing: /tmp/line art crash.crash.txt ``` CC @ideasman42

Philipp Oeser changed title from ~~Grease Pencil : multiple Line Art modifiers cause crashes~~ to Regression: Grease Pencil : multiple Line Art modifiers cause crashes

2023-01-17 14:52:56 +01:00

Campbell Barton self-assigned this 2023-01-18 13:03:55 +01:00

blender-admin commented

2023-01-19 10:33:44 +01:00

This issue was referenced by 2907227db2

This issue was referenced by 2907227db2c91a55d9b55f5d06e82f0547200bb9

Campbell Barton commented

2023-01-19 10:43:17 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Campbell Barton closed this issue

2023-01-19 10:43:17 +01:00

Bastien Montagne added this to the Core project 2023-02-09 15:43:10 +01:00

Bastien Montagne removed this from the Core project 2023-02-09 18:19:06 +01:00

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Regression: Grease Pencil : multiple Line Art modifiers cause crashes #103880