Crash changing any object property in depsgraph_update_post (with the viewport compositing enabled) #107235

New Issue

Nikita Akimov · 2023-04-22T10:54:04+02:00

Nikita Akimov commented

2023-04-22 10:54:04 +02:00

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 680/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.27

Blender Version
Broken: version: 3.5.0, branch: blender-v3.5-release, commit date: 2023-03-29 02:56, hash: 1be25cfff18b
Worked: 3.4

Short description of error
This error occurs only if the viewport compositor is enabled - rendered mode of the viewport and Compositor = Always.
When trying to change the viewport color of the object by script on depsgraph update event, this error occurs.

The short script example:

import bpy

def on_depsgraph_update_post(scene, depsgraph):
    if depsgraph.id_type_updated('SCENE'):
        for obj in depsgraph.updates:
            if isinstance(obj.id, bpy.types.Object):
                print('change object color')
                bpy.data.objects[obj.id.name].color = (1, 0, 0, 0)

bpy.app.handlers.depsgraph_update_post.append(
    on_depsgraph_update_post
)

After executing this script in the Text editor, switching to the "Rendered" mode of the 3D Viewport and enabling viewport compositing - when adding or copying the object - Blender throws an error.

This occurs only if the viewport compositing is enabled, if it is not used - code works as expected.

Error occurs on 3.5 and 3.6 alpha.

Exact steps for others to reproduce the error

I attached .blend file with the example
Open .blend file
Switch the viewport to the "Rendered" mode (z - Rendered)
Execute script in the Text editor
Try to copy cube (shift + d)
Error throws

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 680/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.27 **Blender Version** Broken: version: 3.5.0, branch: blender-v3.5-release, commit date: 2023-03-29 02:56, hash: `1be25cfff18b` Worked: 3.4 **Short description of error** This error occurs only if the viewport compositor is enabled - rendered mode of the viewport and Compositor = Always. When trying to change the viewport color of the object by script on depsgraph update event, this error occurs. The short script example: ``` import bpy def on_depsgraph_update_post(scene, depsgraph): if depsgraph.id_type_updated('SCENE'): for obj in depsgraph.updates: if isinstance(obj.id, bpy.types.Object): print('change object color') bpy.data.objects[obj.id.name].color = (1, 0, 0, 0) bpy.app.handlers.depsgraph_update_post.append( on_depsgraph_update_post ) ``` After executing this script in the Text editor, switching to the "Rendered" mode of the 3D Viewport and enabling viewport compositing - when adding or copying the object - Blender throws an error. This occurs only if the viewport compositing is enabled, if it is not used - code works as expected. Error occurs on 3.5 and 3.6 alpha. **Exact steps for others to reproduce the error** 1. I attached .blend file with the example 2. Open .blend file 3. Switch the viewport to the "Rendered" mode (z - Rendered) 4. Execute script in the Text editor 5. Try to copy cube (shift + d) 6. Error throws

dpupd_err.blend

858 KiB

dpupd_err.crash.txt

18 KiB

err.jpg

273 KiB