Blend file crashes Blender. #103870

New Issue

Joseph Masaki · 2023-01-14T00:23:04+01:00

Joseph Masaki commented

2023-01-14 00:23:04 +01:00

System Information
Operating system: Linux-6.0.12-76060006-generic-x86_64-with-glibc2.35 64 Bits
Graphics card: Mesa Intel(R) UHD Graphics (TGL GT1) Intel 4.6 (Core Profile) Mesa 22.2.0

Blender Version
Broken: version: 3.4.1, branch: blender-v3.4-release, commit date: 2022-12-19 17:00, hash: 55485cb379
Worked: Can't find a build of blender where it doesn't crash going back to 2.7

Short description of error
Blender crashes when opening file.

Exact steps for others to reproduce the error
Open the attach file and blender crashes.

I have had several friends try to open the file on their PCs, and it crashed for them too. Appending the mesh into a file also makes Blender crash.crash.blend

**System Information** Operating system: Linux-6.0.12-76060006-generic-x86_64-with-glibc2.35 64 Bits Graphics card: Mesa Intel(R) UHD Graphics (TGL GT1) Intel 4.6 (Core Profile) Mesa 22.2.0 **Blender Version** Broken: version: 3.4.1, branch: blender-v3.4-release, commit date: 2022-12-19 17:00, hash: `55485cb379` Worked: Can't find a build of blender where it doesn't crash going back to 2.7 **Short description of error** Blender crashes when opening file. **Exact steps for others to reproduce the error** Open the attach file and blender crashes. I have had several friends try to open the file on their PCs, and it crashed for them too. Appending the mesh into a file also makes Blender crash.[crash.blend](https://archive.blender.org/developer/F14148889/crash.blend)

Joseph Masaki commented

2023-01-14 00:23:04 +01:00

Added subscriber: @JosephMasaki

Harley Acheson commented

2023-01-15 01:25:07 +01:00

Added subscribers: @HooglyBoogly, @Harley

Harley Acheson commented

2023-01-15 01:25:07 +01:00

@HooglyBoogly

When this file is loaded it dies in BKE_mesh_legacy_convert_flags_to_selection_layers. It looks like it has some number of mesh->mvert but probably not mesh->totvert.

It hits return vert.flag_legacy & SELECT and vert is nullptr, so access violation getting to vert.flag_legacy.

@HooglyBoogly When this file is loaded it dies in `BKE_mesh_legacy_convert_flags_to_selection_layers`. It looks like it has some number of mesh->mvert but probably not mesh->totvert. It hits `return vert.flag_legacy & SELECT` and `vert` is nullptr, so access violation getting to vert.flag_legacy.

Pratik Borhade commented

2023-01-16 05:38:06 +01:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2023-01-16 05:38:06 +01:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Pratik Borhade commented

2023-01-16 05:38:06 +01:00

I can confirm.

It looks like it has some number of mesh->mvert but probably not mesh->totvert.

Maybe mesh is corrupted?

I can confirm. > It looks like it has some number of mesh->mvert but probably not mesh->totvert. Maybe mesh is corrupted?

Germano Cavalcante commented

2023-01-16 16:23:07 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2023-01-16 16:23:07 +01:00

From what I can see the Mesh has totvert but the pointer to the mverts has not been assigned.
I guess it was caused by 1af62cb3bf.
May be a result of the same bug mentioned in #103878 (Regression: Crash when try recover last session).

From what I can see the Mesh has `totvert` but the pointer to the `mverts` has not been assigned. I guess it was caused by 1af62cb3bf. May be a result of the same bug mentioned in #103878 (Regression: Crash when try recover last session).

3DMish (Mish7913) commented

2023-01-20 08:11:20 +01:00

Added subscriber: @3DMish

3DMish (Mish7913) commented

2023-01-20 08:11:20 +01:00

Hi, I opened this file in hex, and how I see this file was saved by Blender 3.5 version.

So, I downloaded Blender 3.5.0-Alpha, and file opens without a problems.

Hi, I opened this file in hex, and how I see this file was saved by Blender 3.5 version. ![ScreenShot 2023-01-19 23-52-43.png](https://archive.blender.org/developer/F14178543/ScreenShot_2023-01-19_23-52-43.png) So, I downloaded Blender 3.5.0-Alpha, and file opens without a problems.

Hans Goudey commented

2023-01-20 14:52:18 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Resolved'

Hans Goudey closed this issue

2023-01-20 14:52:18 +01:00

Hans Goudey self-assigned this 2023-01-20 14:52:18 +01:00

Hans Goudey commented

2023-01-20 14:52:18 +01:00

Thanks, I'll close this report then.

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Blend file crashes Blender. #103870