blender crashes on entering sculpt mode when mesh has no faces #111255

New Issue

heini · 2023-08-18T10:04:07+02:00

heini commented

2023-08-18 10:04:07 +02:00

System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 527.56

Blender Version
Broken: version: 4.0.0 Alpha, branch: main, commit date: 2023-08-17 23:26, hash: 0fb4c107db92

Caused by 1be70f22cc

Short description of error
If a mesh has no faces, entering sculpt mode will crash blender (factory defaults)

Exact steps for others to reproduce the error
create unfilled circle, enter sculpt mode

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 527.56 **Blender Version** Broken: version: 4.0.0 Alpha, branch: main, commit date: 2023-08-17 23:26, hash: `0fb4c107db92` Caused by 1be70f22ccb7ea1e75d600bf7083da9358fce06d **Short description of error** If a mesh has no faces, entering sculpt mode will crash blender (factory defaults) **Exact steps for others to reproduce the error** create unfilled circle, enter sculpt mode

heini added the

labels 2023-08-18 10:04:08 +02:00

Pratik Borhade commented

2023-08-18 10:45:08 +02:00

Hi, thanks for the report. No crash here in current master, instead I observed rise in memory usage (memory leak perhaps?)

heini commented

2023-08-18 11:19:34 +02:00

Strange. I updated my gfx drivers and tried it on my linux laptop. Same result. On Linux I need to hard reset. On Windows it just freezes then quits to desktop after some time.
I uploaded the file I was testing it on, but there is nothing special about it as far as I can tell.

edit: I found some older builds on Linux, one from july 25 (no crash) another from aug 05 (crash)

Strange. I updated my gfx drivers and tried it on my linux laptop. Same result. On Linux I need to hard reset. On Windows it just freezes then quits to desktop after some time. I uploaded the file I was testing it on, but there is nothing special about it as far as I can tell. edit: I found some older builds on Linux, one from july 25 (no crash) another from aug 05 (crash)

circle.blend

853 KiB

Philipp Oeser commented

2023-08-18 11:40:50 +02:00

Can confirm the crash (going out of memory)

sculpting faceless meshes is generally a minefield (I recall even making a patch that prevents entering sculptmode on faceless meshes).
See related:

But the crash is new, will check.

Can confirm the crash (going out of memory) sculpting faceless meshes is generally a minefield (I recall even making a patch that prevents entering sculptmode on faceless meshes). See related: - #86940 - https://archive.blender.org/developer/D10966 - https://archive.blender.org/developer/D10851 But the crash is new, will check.

Philipp Oeser added

Status

Confirmed

Module

Sculpt, Paint & Texture

and removed

Status

Needs Triage

labels 2023-08-18 11:41:25 +02:00

heini commented

2023-08-18 11:46:59 +02:00

I only discovered it because I totally misremembered that you couldn't sculpt on wires only. Must have mixed it up with grease pencil sculpt mode. In 3.6 where it doesn't crash it behaves a little strange too, when I for example try to sculpt on a cube with a face only on one side (the face moves, but the connected edges won't update on screen)