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Attached file imported with new OBJ importer later crashes on edge subdivision #103649

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opened 2023-01-05 01:26:24 +01:00 by David Conway · 22 comments
David Conway commented 2023-01-05 01:26:24 +01:00
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System Information
Operating system:Windows 10
Graphics card:Geforce GTX

Blender Version
3.4

Short description of error
Crash on subdividing a mesh which is imported with new obj importer
(Mesh corruption is the reason I think)

Exact steps for others to reproduce the errora

  • Open default scene -> delete all
  • Import obj with new importer
  • Select object -> switch to edit mode
  • Select all verts/edges
  • call Subdivide from context menu (Right click)
    stage2.obj
    blender.crash.txt
**System Information** Operating system:Windows 10 Graphics card:Geforce GTX **Blender Version** 3.4 **Short description of error** Crash on subdividing a mesh which is imported with new obj importer (Mesh corruption is the reason I think) **Exact steps for others to reproduce the error**a - Open default scene -> delete all - Import obj with new importer - Select object -> switch to edit mode - Select all verts/edges - call `Subdivide` from context menu (Right click) [stage2.obj](https://archive.blender.org/developer/F14114587/stage2.obj) [blender.crash.txt](https://archive.blender.org/developer/F14114444/blender.crash.txt)
David Conway commented 2023-01-05 01:26:24 +01:00
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Added subscriber: @generalkenobi2

Added subscriber: @generalkenobi2
Iliya Katushenock commented 2023-01-05 01:30:15 +01:00
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Added subscriber: @mod_moder

Added subscriber: @mod_moder
Iliya Katushenock commented 2023-01-05 01:30:15 +01:00
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Changed status from 'Needs Triage' to: 'Needs User Info'

Changed status from 'Needs Triage' to: 'Needs User Info'
Iliya Katushenock commented 2023-01-05 01:30:15 +01:00
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Hello, please, add some infor about your system and blender version: image.png

Hello, please, add some infor about your system and blender version: ![image.png](https://archive.blender.org/developer/F13771057/image.png)
David Conway commented 2023-01-05 01:47:47 +01:00
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This comment was removed by @generalkenobi2

*This comment was removed by @generalkenobi2*
David Conway commented 2023-01-05 01:48:04 +01:00
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system-info.txt

[system-info.txt](https://archive.blender.org/developer/F14114466/system-info.txt)
David Conway commented 2023-01-05 01:48:29 +01:00
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I've attached the sys-info

I've attached the sys-info
Iliya Katushenock commented 2023-01-05 01:55:26 +01:00
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Thank you, though I meant the information for the report header. It's usually enough

Thank you, though I meant the information for the report header. It's usually enough
David Conway commented 2023-01-05 02:27:15 +01:00
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Am I still missing info?

Am I still missing info?
Iliya Katushenock commented 2023-01-05 02:29:23 +01:00
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Changed status from 'Needs User Info' to: 'Needs Triage'

Changed status from 'Needs User Info' to: 'Needs Triage'
Iliya Katushenock commented 2023-01-05 02:31:55 +01:00
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Changed status from 'Needs Triage' to: 'Needs User Info'

Changed status from 'Needs Triage' to: 'Needs User Info'
Iliya Katushenock commented 2023-01-05 02:31:55 +01:00
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Okay, thanks for the system details. Now about the file. Can you attach an example where you can confirm the failure?

Okay, thanks for the system details. Now about the file. Can you attach an example where you can confirm the failure?
David Conway commented 2023-01-05 03:32:09 +01:00
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stage2.obj

[stage2.obj](https://archive.blender.org/developer/F14114587/stage2.obj)
Iliya Katushenock commented 2023-01-05 03:46:35 +01:00
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Changed status from 'Needs User Info' to: 'Needs Triage'

Changed status from 'Needs User Info' to: 'Needs Triage'
Iliya Katushenock commented 2023-01-05 03:46:35 +01:00
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Thank you. I checked and can't confirm.
I tested the model import and division in both today's debug build and the old regular build. I have a suspicion that it's either just out of memory or related to the render hardware.

Thank you. I checked and can't confirm. I tested the model import and division in both today's debug build and the old regular build. I have a suspicion that it's either just out of memory or related to the render hardware.
David Conway commented 2023-01-05 03:50:29 +01:00
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In #103649#1469349, @mod_moder wrote:
Thank you. I checked and can't confirm.
I tested the model import and division in both today's debug build and the old regular build. I have a suspicion that it's either just out of memory or related to the render hardware.

How can I tell if im out of RAM, it crashes instantly and can't see it in task manager

> In #103649#1469349, @mod_moder wrote: > Thank you. I checked and can't confirm. > I tested the model import and division in both today's debug build and the old regular build. I have a suspicion that it's either just out of memory or related to the render hardware. How can I tell if im out of RAM, it crashes instantly and can't see it in task manager
Pratik Borhade commented 2023-01-05 05:24:35 +01:00
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Added subscribers: @aras_p, @PratikPB2123

Added subscribers: @aras_p, @PratikPB2123
Pratik Borhade commented 2023-01-05 05:24:35 +01:00
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Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'
Pratik Borhade commented 2023-01-05 05:24:35 +01:00
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Hi, thanks for the report. Can repro the crash if obj file is imported with new C++ importer.
Looks like importing through it generates corrupted mesh (got loads of error message after running mesh.validate )
This does not happen on importing with legacy obj importer.
@aras_p , any idea what's causing this?
One difference I noticed is: new importer has not included edge creases

Hi, thanks for the report. Can repro the crash if obj file is imported with new C++ importer. Looks like importing through it generates corrupted mesh (got loads of error message after running [mesh.validate ](https://docs.blender.org/api/current/bpy.types.Mesh.html#bpy.types.Mesh.validate)) This does not happen on importing with legacy obj importer. @aras_p , any idea what's causing this? One difference I noticed is: new importer has not included edge creases
Aras Pranckevicius changed title from Blender crashes on edge subdivision to Attached file imported with new OBJ importer later crashes on edge subdivision 2023-01-05 06:00:15 +01:00
Aras Pranckevicius self-assigned this 2023-01-05 06:00:15 +01:00
Aras Pranckevicius commented 2023-01-05 06:00:15 +01:00
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Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'

Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'
Aras Pranckevicius commented 2023-01-05 06:18:58 +01:00
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Looks like the OBJ file is produced from Blender itself. Can you also attach the original .blend file that you exported this model from? It seems that the OBJ file contains some "invalid mesh data" (duplicate faces, etc.), but I'm wondering how they got there in the first place.

Looks like the OBJ file is produced from Blender itself. Can you also attach the original .blend file that you exported this model from? It seems that the OBJ file contains some "invalid mesh data" (duplicate faces, etc.), but I'm wondering how they got there in the first place.
Bastien Montagne added this to the Pipeline, Assets & IO project 2023-02-09 15:39:30 +01:00
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Aras Pranckevicius commented 2023-05-30 20:47:00 +02:00
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From what I can tell, the repro OBJ file is invalid (duplicate faces etc.). The "validate option" is off in the new OBJ importer by default (following what is done with USD/Alembic), since validation has quite a lot of overhead. With validate option on, the crash does not happen.

The user never replied how they got the invalid OBJ file in the first place, so I'm thinking of closing this.

From what I can tell, the repro OBJ file is invalid (duplicate faces etc.). The "validate option" is off in the new OBJ importer by default (following what is done with USD/Alembic), since validation has quite a lot of overhead. With validate option on, the crash does not happen. The user never replied how they got the invalid OBJ file in the first place, so I'm thinking of closing this.
Aras Pranckevicius added
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Bastien Montagne removed this from the Pipeline, Assets & IO project 2023-07-03 13:02:47 +02:00
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