Adding subdivision modifier to a certain mesh causes segfault #50931

New Issue

Joel Palmius · 2017-03-12T17:35:05+01:00

Joel Palmius commented

2017-03-12 17:35:05 +01:00

System Information

Ubuntu 16.04 (64-bit), geforce nvidia gtx 980 ti + geforce nvidia gtx 980.

Blender Version

Broken: 2.78 (first release, not a, b or c)

Short description of error

A specific mesh is able to cause a segfault in blender when adding a subdivision modifier.

Exact steps for others to reproduce the error

I have imported a mesh using MHX2. When adding a subdivision modivier to the mesh, it disappears (is no longer visible in viewport). Trying to get around this, I join it with a cube, and then add the subdivision modifier. This causes blender to segfault.

I am able to reproduce the error by repeating the whole procedure. I'm here attaching a blend file with the step immediately before the crash. For me, if adding a subdivision modifier as a next step to the toga joined with cube object, the crash happens.

toga_crash.blend

No other mesh I have causes the disappearance nor the segfault.

Also attaching crash log

LightRoom2.crash.txt

**System Information** Ubuntu 16.04 (64-bit), geforce nvidia gtx 980 ti + geforce nvidia gtx 980. **Blender Version** Broken: 2.78 (first release, not a, b or c) **Short description of error** A specific mesh is able to cause a segfault in blender when adding a subdivision modifier. **Exact steps for others to reproduce the error** I have imported a mesh using MHX2. When adding a subdivision modivier to the mesh, it disappears (is no longer visible in viewport). Trying to get around this, I join it with a cube, and then add the subdivision modifier. This causes blender to segfault. I am able to reproduce the error by repeating the whole procedure. I'm here attaching a blend file with the step immediately before the crash. For me, if adding a subdivision modifier as a next step to the toga joined with cube object, the crash happens. [toga_crash.blend](https://archive.blender.org/developer/F507827/toga_crash.blend) No other mesh I have causes the disappearance nor the segfault. Also attaching crash log [LightRoom2.crash.txt](https://archive.blender.org/developer/F507828/LightRoom2.crash.txt)

Joel Palmius commented

2017-03-12 17:35:05 +01:00

Changed status to: 'Open'

Joel Palmius commented

2017-03-12 17:35:05 +01:00

Added subscriber: @joepal

Bastien Montagne commented

2017-03-14 15:13:53 +01:00

Added subscriber: @mont29

Bastien Montagne commented

2017-03-14 15:13:53 +01:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2017-03-14 15:13:53 +01:00

Bastien Montagne self-assigned this 2017-03-14 15:13:53 +01:00

Bastien Montagne commented

2017-03-14 15:13:53 +01:00

That mesh is invalid (use C.object.data.validate(1) in py console with said mesh active, and see messages in system console - it will also fix its issues…).

That mesh is invalid (use `C.object.data.validate(1)` in py console with said mesh active, and see messages in system console - it will also fix its issues…).

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Adding subdivision modifier to a certain mesh causes segfault #50931