Subdividing a plane with overlapping faces created via Grid Fill crashes Blender #120143

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Albert-OShea · 2024-04-01T14:21:34+02:00

Albert-OShea commented

2024-04-01 14:21:34 +02:00

System Information
Operating system: Windows-10-10.0.22621-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 536.99

Blender Version
Broken: version: 4.1.0, branch: blender-v4.1-release, commit date: 2024-03-25 20:42, hash: 40a5e739e270
Also broken in 3.6, 4.0

Short description of error
Using the Grid Fill operation on a simple plane can create 2 overlapping faces, both of which connected to the same 4 vertices. If you then use the Subdivide operation on this in edit mode, and increase the number of cuts to 3, Blender crashes.

Exact steps for others to reproduce the error

Open attached blend file
Press Ctrl+E > Subdivide
In the bottom left operator panel, increase the number of cuts to 3
Blender crashes

**System Information** Operating system: Windows-10-10.0.22621-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 536.99 **Blender Version** Broken: version: 4.1.0, branch: blender-v4.1-release, commit date: 2024-03-25 20:42, hash: `40a5e739e270` Also broken in 3.6, 4.0 **Short description of error** Using the Grid Fill operation on a simple plane can create 2 overlapping faces, both of which connected to the same 4 vertices. If you then use the Subdivide operation on this in edit mode, and increase the number of cuts to 3, Blender crashes. **Exact steps for others to reproduce the error** - Open attached blend file - Press Ctrl+E > Subdivide - In the bottom left operator panel, increase the number of cuts to 3 - Blender crashes

grid-fill-subdivide.blend

619 KiB

Albert-OShea added the

labels 2024-04-01 14:21:34 +02:00

Germano Cavalcante commented

2024-04-02 00:41:40 +02:00

Thanks for the report.
The mesh you provided seems to have duplicate faces, which is invalid and shouldn't be allowed in Blender.
We are aware of this issue and the crash that occurs when using subdivision on such meshes.
This was reported already in #70977: "Dissolve can create duplicate faces / invalid geometry (leading to crashes on further modeling operators such as Subdivide Edges)."

I will merge the reports. Please subscribe in #70977 if you want to see further updates

Thanks for the report. The mesh you provided seems to have duplicate faces, which is invalid and shouldn't be allowed in Blender. We are aware of this issue and the crash that occurs when using subdivision on such meshes. This was reported already in #70977: "Dissolve can create duplicate faces / invalid geometry (leading to crashes on further modeling operators such as Subdivide Edges)." I will merge the reports. Please subscribe in #70977 if you want to see further updates

Germano Cavalcante closed this issue

2024-04-02 00:41:43 +02:00

Blender Bot added

and removed

labels 2024-04-02 00:41:43 +02:00

Germano Cavalcante added

Status

Duplicate