Trimmed curve with subsurf crashes Blender #79207

Closed
opened 2020-07-23 23:13:20 +02:00 by Serge Lyatin · 9 comments

System Information
Operating system: win10

Blender Version
Broken: (2.90.2 Alpha, 2.79b)

Short description of error
Curve has 2 beveled splines, one is zero length (see it in edit mode), end is trimmed at 0.99 value with "spline" mode (see curve's data tab).
Enabling subsurf modifier in viewport crashes Blender. Other trimming modes works w/o issue.

Exact steps for others to reproduce the error

  • In an empty scene, add the biezer curve
  • Go to Edit mode
  • Duplicate and move the spline ({key Shift D})
  • Set handle type of the new spline to free ({key V})
  • Scale this new spline to zero ({key S 0})
  • Exit edit mode
  • In Object Data Properties -> Geometry -> Bevel set:
  • Depth: 1.0
  • Bevel End: 0.99
  • Bevel Mapping Start: Spline
  • Bevel Mapping End: Spline
  • Add the subsurf modifier -> crash
    or:
  • Open attached file
  • enable subsurf modifier in viewport -> crash

Curve_subsurf.blend

**System Information** Operating system: win10 **Blender Version** Broken: (2.90.2 Alpha, 2.79b) **Short description of error** Curve has 2 beveled splines, one is zero length (see it in edit mode), end is trimmed at 0.99 value with "spline" mode (see curve's data tab). Enabling subsurf modifier in viewport crashes Blender. Other trimming modes works w/o issue. **Exact steps for others to reproduce the error** - In an empty scene, add the biezer curve - Go to Edit mode - Duplicate and move the spline ({key Shift D}) - Set handle type of the new spline to `free` ({key V}) - Scale this new spline to zero ({key S 0}) - Exit edit mode - In `Object Data Properties` -> `Geometry` -> `Bevel` set: - `Depth`: 1.0 - `Bevel End`: 0.99 - `Bevel Mapping Start`: Spline - `Bevel Mapping End`: Spline - Add the subsurf modifier -> crash or: - Open attached file - enable subsurf modifier in viewport -> crash [Curve_subsurf.blend](https://archive.blender.org/developer/F8716817/Curve_subsurf.blend)
Author

Added subscriber: @SergeL

Added subscriber: @SergeL

Added subscriber: @mano-wii

Added subscriber: @mano-wii

I can confirm. But I can't say if the problem is a corrupted data.
It would be interesting if you described the steps to achieve that curve.

I can confirm. But I can't say if the problem is a corrupted data. It would be interesting if you described the steps to achieve that curve.
Author

It's a result from Animation Nodes, I've fixed zero-length splines (is it considered as corrupted data?) inside it and everything is ok. But still thinking Blender should not crash that hard.

It's a result from Animation Nodes, I've fixed zero-length splines (is it considered as corrupted data?) inside it and everything is ok. But still thinking Blender should not crash that hard.

Changed status from 'Needs Triage' to: 'Confirmed'

Changed status from 'Needs Triage' to: 'Confirmed'

After investigating further I figured out how to recreate the curve.
I edited the description.
Thanks for the report.
Confirming.

After investigating further I figured out how to recreate the curve. I edited the description. Thanks for the report. Confirming.
Sybren A. Stüvel self-assigned this 2020-07-27 15:58:34 +02:00

This issue was referenced by 2c68c92524

This issue was referenced by 2c68c925243707df50f54fbc49f43916f9bc1e4a

This issue was referenced by 2bc017ece1

This issue was referenced by 2bc017ece147bd5556ca524fb9989ab79789f30c

Changed status from 'Confirmed' to: 'Resolved'

Changed status from 'Confirmed' to: 'Resolved'
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Reference: blender/blender#79207
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