Boolean modifier crash (when animating) #86390

New Issue

Carl Brewer · 2021-03-08T13:50:01+01:00

Carl Brewer commented

2021-03-08 13:50:01 +01:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 3070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.72

Blender Version
Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: 02948a2cab
Worked: (newest version of Blender that worked as expected)

Short description of error
When running this animation, Blender crashes at random frames. when running with 2.91.2 it crashes after hanging for 30s or so at frame 126

Exact steps for others to reproduce the error
Run the animation in the attached .blend file

gov-11.blend

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce RTX 3070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.72 **Blender Version** Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: `02948a2cab` Worked: (newest version of Blender that worked as expected) **Short description of error** When running this animation, Blender crashes at random frames. when running with 2.91.2 it crashes after hanging for 30s or so at frame 126 **Exact steps for others to reproduce the error** Run the animation in the attached .blend file [gov-11.blend](https://archive.blender.org/developer/F9879271/gov-11.blend)

Carl Brewer commented

2021-03-08 13:50:01 +01:00

Added subscriber: @Bleve

Falk David commented

2021-03-08 15:03:02 +01:00

Added subscriber: @filedescriptor

Falk David commented

2021-03-08 15:03:02 +01:00

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

Falk David commented

2021-03-08 15:03:02 +01:00

I can confirm this crash on the latest 2.93.0 Alpha, branch: master, commit date: 2021-03-08 07:52, hash: 74c50d0c77.

This crashes in the blender/source/blender/blenlib/intern/mesh_boolean.cc file due to an assert:

/* In zero-volume cells, the cell should have exactly two patches. */
BLI_assert(cell->patches().size() == 2);

(cell->patches().size() was 6)

Switching the solver to "Fast" in the modifier will not crash.

I can confirm this crash on the latest 2.93.0 Alpha, branch: master, commit date: 2021-03-08 07:52, hash: `74c50d0c77`. This crashes in the `blender/source/blender/blenlib/intern/mesh_boolean.cc` file due to an assert: ``` /* In zero-volume cells, the cell should have exactly two patches. */ BLI_assert(cell->patches().size() == 2); ``` (`cell->patches().size()` was 6) Switching the solver to "Fast" in the modifier will not crash.

Carl Brewer commented

2021-03-09 07:50:04 +01:00

Thank you, Falk, I've moved the boolean switch to "fast" and the crash is gone.

Campbell Barton changed title from ~~Crash when animating~~ to Boolean crash (when animating)

2021-03-09 09:12:29 +01:00

Campbell Barton changed title from ~~Boolean crash (when animating)~~ to Boolean modifier crash (when animating)

2021-03-09 09:12:40 +01:00

Howard Trickey was assigned by Campbell Barton

2021-03-09 09:15:42 +01:00

Howard Trickey commented

2021-03-13 20:36:27 +01:00

i am looking at this now. There are lots of zero or near-zero area faces because the ring inside the face on the top of the arm pin (Cylinder.009) has what appear to be doubled vertices with zero-length edges connecting them. I advise selecting all vertices and then doing Mesh > Clean Up > Degenerate Dissolve on that mesh. Then the animation runs without crashing.

But of course, the code should be robust against such things so I shall continue to track down why my assumption that that assert is about was violated and fix it so it doesn't crash.

i am looking at this now. There are lots of zero or near-zero area faces because the ring inside the face on the top of the arm pin (Cylinder.009) has what appear to be doubled vertices with zero-length edges connecting them. I advise selecting all vertices and then doing Mesh > Clean Up > Degenerate Dissolve on that mesh. Then the animation runs without crashing. But of course, the code should be robust against such things so I shall continue to track down why my assumption that that assert is about was violated and fix it so it doesn't crash.

blender-admin commented

2021-03-14 01:23:14 +01:00

This issue was referenced by e8e4a79512

This issue was referenced by e8e4a795122a10dfa0b10c8e91247a1ab3288319

Howard Trickey commented

2021-03-14 01:26:13 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Howard Trickey closed this issue

2021-03-14 01:26:13 +01:00

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Boolean modifier crash (when animating) #86390